List of nuclides

This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopes of the first 105 elements, except for elements 87 (francium), 102 (nobelium) and 104 (rutherfordium). At least 3,300 nuclides have been experimentally characterized^[1] (see List of radioactive nuclides by half-life for the nuclides with decay half-lives less than one hour).

A nuclide is defined conventionally as an experimentally examined bound collection of protons and neutrons that either is stable or has an observed decay mode.

Introduction

There are 251 known so-called stable nuclides. Many of these in theory could decay through spontaneous fission, alpha decay, double beta decay, etc. with a very long half-life, but no radioactive decay has yet been observed. Thus, the number of stable nuclides is subject to change if some of these 251 are determined to be very long-lived radioactive nuclides in the future. In this article, the "stable" nuclides are divided into three tables, one for nuclides that are theoretically stable (meaning no decay mode is possible) and nuclides that can theoretically undergo spontaneous fission but have not been evaluated to check for evidence of this happening, one for nuclides that can theoretically undergo forms of decay other than spontaneous fission but have not been evaluated, and finally a table of nuclides that can theoretically decay and have been evaluated but without detecting any decay. In this latter table, where a decay has been predicted theoretically but never observed experimentally (either directly or through finding an excess of the daughter), the theoretical decay mode is given in parentheses and have "> number" in the half-life column to show the lower limit for the half-life based on experimental observation. Such nuclides are considered to be "stable" until a decay has been observed in some fashion. For example, tellurium-123 was reported to be radioactive, but the same experimental group later retracted this report, and it presently remains observationally stable.

The next group is the primordial radioactive nuclides. These have been measured to be radioactive, or decay products have been identified in natural samples (tellurium-128, barium-130). There are 35 of these (see these nuclides), of which 25 have half-lives longer than 10¹³ years. With most of these 25, decay is difficult to observe and for most purposes they can be regarded as effectively stable. Bismuth-209 is notable as it is the only naturally occurring isotope of an element which was long considered stable. A further 10 nuclides, platinum-190, samarium-147, lanthanum-138, rubidium-87, rhenium-187, lutetium-176, thorium-232, uranium-238, potassium-40, and uranium-235 have half-lives between 7.0×10⁸ and 4.83×10¹¹ years, which means they have experienced at least 0.5% depletion since the formation of the Solar System about 4.6×10⁹ years ago, but still exist on Earth in significant quantities. They are the primary source of radiogenic heating and radioactive decay products. Together, there are a total of 286 primordial nuclides.^[a]

The list then covers the ~700 radionuclides with half-lives longer than 1 hour, split into two tables, half-lives greater than one day and less than one day.

Over 60 nuclides that have half-lives too short to be primordial can be detected in nature as a result of later production by natural processes, mostly in trace amounts. These include ~44 radionuclides occurring in the decay chains of primordial uranium and thorium (radiogenic nuclides), such as radon-222. Others are the products of interactions with energetic cosmic-rays (e.g. cosmic ray spallation) (cosmogenic nuclides), such as carbon-14. This gives a total of about 350 naturally occurring nuclides. Other nuclides may be occasionally produced naturally by rare cosmogenic interactions or as a result of other natural nuclear reactions (nucleogenic nuclides), but are difficult to detect.

Further shorter-lived nuclides have been detected in the spectra of stars, such as isotopes of technetium, promethium, and some actinides. The remaining nuclides are known solely from artificial nuclear transmutation. Some, such as caesium-137, are found in the environment but as a result of contamination from releases of man-made nuclear fission product (from nuclear weapons, nuclear reactors, and other processes). Other are produced artificially for industrial or medical purposes.

List legend

Each group of radionuclides, starting with the longest-lived primordial radionuclides, is sorted by decreasing half-life, but the tables are sortable by other columns.

no (number) column

A running positive integer for reference. This number, i.e. position in this table, might be changed in the future, especially for nuclides with short half-lives.

nuclide column

Nuclide identifiers are given by their atomic mass number A and the symbol for the corresponding chemical element (corresponding to the unique proton number). In the cases that this is not the ground state, this is indicated by a m for metastable appended to the mass number. Sorting here sorts by mass number.

Z, N column

The number of protons (Z column) and number of neutrons (N column).

energy column

The column labeled "energy" denotes the energy equivalent of the mass of a neutron minus the mass per nucleon of this nuclide (so all nuclides get a positive value) in MeV, formally: m_n − m_nuclide / A, where A = Z + N is the mass number. Note that this means that a higher "energy" value actually means that the nuclide has a lower energy. The mass of the nuclide (in daltons) is A (m_n − E / k) where E is the energy, m_n is 1.008664916 Da and k = 931.49410242 the conversion factor between MeV and daltons.

half-life column

The main column shows times in seconds (31,556,926 seconds = 1 tropical year); a second column showing half-life in more usual units (year, day) is also provided.

Entries starting with a ">" indicates that no decay has ever been observed, with null experiments establishing lower limits for the half-life. Such elements are considered stable unless a decay can be observed (establishing an actual estimate for the half-life). Note half-lives may be imprecise estimates and can be subject to significant revision.

decay mode column

α	α decay
β^−	β^− decay
β^−β^−	double β^− decay
ε	electron capture
β^+	β^+ decay
β^+β^+	double β^+ decay
SF	spontaneous fission
IT	isomeric transition

Decay modes in parentheses are still not observed through experiment but are, by their energy, predicted to occur. Numbers in brackets indicate probability of that decay mode occurring in %, tr indicate <0.1%. Spontaneous fission is not shown as a theoretical decay mode for stable nuclides where other modes are possible (see these nuclides).

decay energy column

Multiple values for (maximal) decay energy are mapped to decay modes in their order. The decay energy listed is for the specific nuclide only, not for the whole decay chain. It includes the energy lost to neutrinos.

notes column

CG

Cosmogenic nuclide;

DP

Naturally occurring decay product (of thorium-232, uranium-238, and uranium-235);

ESS

Present in the early Solar System (first few million years), but extinct now as a primordial nuclide.

FP

Nuclear fission product (only those from uranium-235 or plutonium-239) (only those with a half-life over one day are shown);

IM

Industry or medically used radionuclide.^[3]

Full list

Theoretically stable nuclides

Main article: Stable nuclide

These are the theoretically stable nuclides, ordered by "energy".

No.	Nuclide	A	Z	N	Energy (MeV)
1	^56Fe	56	26	30	9.153567
2	^62Ni	62	28	34	9.147877
3	^60Ni	60	28	32	9.145862
4	^58Fe	58	26	32	9.142938
5	^52Cr	52	24	28	9.137037
6	^57Fe	57	26	31	9.127119
7	^59Co	59	27	32	9.126046
8	^54Cr	54	24	30	9.125633
9	^61Ni	61	28	33	9.124129
10	^55Mn	55	25	30	9.120611
11	^64Ni	64	28	36	9.119754
12	^66Zn	66	30	36	9.115258
13	^53Cr	53	24	29	9.114435
14	^63Cu	63	29	34	9.112272
15	^65Cu	65	29	36	9.106154
16	^68Zn	68	30	38	9.100845
17	^50Ti	50	22	28	9.099861
18	^51V	51	23	28	9.094884
19	^67Zn	67	30	37	9.084468
20	^48Ti	48	22	26	9.081488
21	^72Ge	72	32	40	9.079465
22	^70Ge	70	32	38	9.079372
23	^69Ga	69	31	38	9.076078
24	^88Sr	88	38	50	9.070438
25	^74Ge	74	32	42	9.063522
26	^49Ti	49	22	27	9.062323
27	^76Se	76	34	42	9.061485
28	^71Ga	71	31	40	9.059218
29	^78Se	78	34	44	9.058842
30	^90Zr	90	40	50	9.057631
31	^89Y	89	39	50	9.056743
32	^86Sr	86	38	48	9.054160
33	^82Kr	82	36	46	9.054126
34	^84Kr	84	36	48	9.052649
35	^73Ge	73	32	41	9.048006
36	^87Sr	87	38	49	9.046964
37	^75As	75	33	42	9.045093
38	^80Kr	80	36	44	9.044984
39	^77Se	77	34	43	9.040153
40	^85Rb	85	37	48	9.037998
41	^91Zr	91	40	51	9.037156
42	^83Kr	83	36	47	9.034966
43	^79Br	79	35	44	9.034220
44	^81Br	81	35	46	9.033979
45	^92Zr	92	40	52	9.032783
46	^46Ti	46	22	24	9.030532
47	^47Ti	47	22	25	9.027336
48	^44Ca	44	20	24	9.013793
49	^94Mo	94	42	52	9.011856
50	^93Nb	93	41	52	9.009051
51	^96Mo	96	42	54	8.996229
52	^95Mo	95	42	53	8.994564
53	^42Ca	42	20	22	8.989116
54	^38Ar	38	18	20	8.984870
55	^45Sc	45	21	24	8.983945
56	^97Mo	97	42	55	8.973806
57	^98Ru	98	44	54	8.971572
58	^43Ca	43	20	23	8.964551
59	^100Ru	100	44	56	8.963517
60	^99Ru	99	44	55	8.956348
61	^34S	34	16	18	8.951675
62	^40Ar	40	18	22	8.947325
63	^102Ru	102	44	58	8.944837
64	^101Ru	101	44	57	8.942117
65	^41K	41	19	22	8.938623
66	^39K	39	19	20	8.938174
67	^104Pd	104	46	58	8.930847
68	^37Cl	37	17	20	8.929760
69	^103Rh	103	45	58	8.925910
70	^36S	36	16	20	8.923108
71	^106Pd	106	46	60	8.919460
72	^105Pd	105	46	59	8.913356
73	^35Cl	35	17	18	8.900285
74	^108Pd	108	46	62	8.900253
75	^107Ag	107	47	60	8.897514
76	^110Cd	110	48	62	8.892718
77	^30Si	30	14	16	8.885761
78	^109Ag	109	47	62	8.885300
79	^32S	32	16	16	8.884318
80	^33S	33	16	17	8.876964
81	^31P	31	15	16	8.859744
82	^28Si	28	14	14	8.838935
83	^29Si	29	14	15	8.826327
84	^112Cd	112	48	64	8.880077
85	^111Cd	111	48	63	8.875445
86	^114Sn	114	50	64	8.865722
87	^113In	113	49	64	8.862212
88	^116Sn	116	50	66	8.860362
89	^115Sn	115	50	65	8.854249
90	^118Sn	118	50	68	8.848073
91	^117Sn	117	50	67	8.843977
92	^120Sn	120	50	70	8.830537
93	^119Sn	119	50	69	8.828201
94	^121Sb	121	51	70	8.811783
95	^122Te	122	52	70	8.811606
96	^124Te	124	52	72	8.801364
97	^123Sb	123	51	72	8.796727
98	^126Te	126	52	74	8.786126
99	^125Te	125	52	73	8.783505
100	^128Xe	128	54	74	8.773359
101	^127I	127	53	74	8.771981
102	^130Xe	130	54	76	8.762725
103	^129Xe	129	54	75	8.758904
104	^132Xe	132	54	78	8.747695
105	^131Xe	131	54	77	8.746253
106	^134Ba	134	56	78	8.735133
107	^133Cs	133	55	78	8.733515
108	^136Ba	136	56	80	8.724908
109	^135Ba	135	56	79	8.722072
110	^137Ba	137	56	81	8.711628
111	^138Ba	138	56	82	8.710904
112	^27Al	27	13	14	8.708242
113	^140Ce	140	58	82	8.700494
114	^139La	139	57	82	8.698892
115	^26Mg	26	12	14	8.694981
116	^141Pr	141	59	82	8.681405
117	^142Nd	142	60	82	8.676646
118	^24Mg	24	12	12	8.651911
119	^25Mg	25	12	13	8.599047
120	^156Gd	156	64	92	8.536342
121	^157Gd	157	64	93	8.522478
122	^158Gd	158	64	94	8.518775
123	^159Tb	159	65	94	8.508680
124	^23Na	23	11	12	8.485675
125	^163Dy	163	66	97	8.478607
126	^164Dy	164	66	98	8.473604
127	^22Ne	22	10	12	8.436087
128	^20Ne	20	10	10	8.423422
129	^16O	16	8	8	8.367390
130	^21Ne	21	10	11	8.344280
131	^19F	19	9	10	8.149612
132	^17O	17	8	9	8.118904
133	^18O	18	8	10	8.114744
134	^12C	12	6	6	8.071327
135	^15N	15	7	8	8.064594
136	^14N	14	7	7	7.866827
137	^13C	13	6	7	7.830943
138	^4He	4	2	2	7.465077
139	^11B	11	5	6	7.283337
140	^10B	10	5	5	6.866257
141	^9Be	9	4	5	6.810483
142	^7Li	7	3	4	5.941599
143	^6Li	6	3	3	5.723527
144	^3He	3	2	1	3.094327
145	^2H	2	1	1	1.503327
146	^1H	1	1	0	0.782327

Nuclides that are observationally stable, having theoretical decay modes other than spontaneous fission

Ordered by "energy".

No.	Nuclide	A	Z	N	Energy	Decay mode	Decay energy (MeV)
147	^80Se	80	34	46	9.043326	(β^−β^−)	0.134
148	^86Kr	86	36	50	9.039532	(β^−β^−)	1.256
149	^84Sr	84	38	46	9.031375	(β^+β^+)	1.787
150	^102Pd	102	46	56	8.933337	(β^+β^+)	1.172
151	^36Ar	36	18	18	8.911105	(β^+β^+)	0.433
152	^122Sn	122	50	72	8.808590	(β^−β^−)	0.366
153	^150Sm	150	62	88	8.585043	(α)	1.449
154	^152Sm	152	62	90	8.563227	(α)	0.220
155	^154Gd	154	64	90	8.549985	(α)	0.081
156	^155Gd	155	64	91	8.536341	(α)	0.081
157	^164Er	164	68	96	8.473462	(β^+β^+, α)	0.024, 1.304
158	^165Ho	165	67	98	8.464689	(α)	0.139
159	^166Er	166	68	98	8.462482	(α)	0.831
160	^167Er	167	68	99	8.450350	(α)	0.666
161	^168Er	168	68	100	8.446308	(α)	0.553
162	^169Tm	169	69	100	8.433931	(α)	1.200
163	^170Yb	170	70	100	8.428792	(α)	1.738
164	^171Yb	171	70	101	8.418182	(α)	1.559
165	^172Yb	172	70	102	8.415864	(α)	1.310
166	^173Yb	173	70	103	8.404023	(α)	0.946
167	^174Yb	174	70	104	8.398624	(α)	0.740
168	^175Lu	175	71	104	8.386589	(α)	1.620
169	^181Ta	181	73	108	8.338961	(α)	1.526
170	^185Re	185	75	110	8.308204	(α)	2.195
171	^191Ir	191	77	114	8.263508	(α)	2.084
172	^194Pt	194	78	116	8.250519	(α)	1.504
173	^193Ir	193	77	116	8.250259	(α)	1.017
174	^195Pt	195	78	117	8.239516	(α)	1.158
175	^196Pt	196	78	118	8.237896	(α)	0.794
176	^197Au	197	79	118	8.229404	(α)	0.954
177	^198Hg	198	80	118	8.227663	(α)	1.383
178	^199Hg	199	80	119	8.219805	(α)	0.824
179	^200Hg	200	80	120	8.218848	(α)	0.718
180	^201Hg	201	80	121	8.208956	(α)	0.334
181	^202Hg	202	80	122	8.206703	(α)	0.136
182	^203Tl	203	81	122	8.198230	(α)	0.911
183	^204Hg	204	80	124	8.192358	(β^−β^−)	0.416
184	^205Tl	205	81	124	8.187526	(α)	0.157

Observationally stable nuclides for which decay has been searched for but not found (only lower bounds known)

Ordered by lower bound on half-life.

No.	Nuclide	A	Z	N	Energy	Half-life (seconds)	Half-life (years)	Decay mode	Decay energy (MeV)
185	^134Xe	134	54	80	8.728973	> 8.8×10^29	> 2.8×10^22[4]	(β^−β^−)	0.825
186	^40Ca	40	20	20	8.942485	> 3.1×10^29	> 9.9×10^21[5]	(β^+β^+)	0.194
187	^184W	184	74	110	8.319737	> 2.8×10^29	> 8.9×10^21[5]	(α)	1.656
188	^182W	182	74	108	8.336424	> 2.4×10^29	> 7.7×10^21[5]	(α)	1.772
189	^208Pb	208	82	126	8.175888	> 8.2×10^28	> 2.6×10^21[6]	(α)	0.519
190	^206Pb	206	82	124	8.186791	> 7.9×10^28	> 2.5×10^21[6]	(α)	1.137
191	^126Xe	126	54	72	8.779010	> 6.0×10^28	> 1.9×10^21[7]	(β^+β^+)	0.897
192	^207Pb	207	82	125	8.179791	> 6.0×10^28	> 1.9×10^21[6]	(α)	0.391
193	^120Te	120	52	68	8.816369	> 5.0×10^28	> 1.6×10^21[5]	(β^+β^+)	1.700
194	^106Cd	106	48	58	8.893327	> 3.5×10^28	> 1.1×10^21[5]	(β^+β^+)	2.770
195	^58Ni	58	28	30	9.109736	> 2.2×10^28	> 7.0×10^20[5]	(β^+β^+)	1.926
196	^183W	183	74	109	8.324699	> 2.1×10^28	> 6.7×10^20[5]	(α)	1.680
197	^104Ru	104	44	60	8.918337	> 2.0×10^28	> 6.5×10^20[8]	(β^−β^−)	1.300
198	^54Fe	54	26	28	9.113040	> 1.4×10^28	> 4.4×10^20[9]	(β^+β^+)	0.680
199	^132Ba	132	56	76	8.741288	> 9.5×10^27	> 3.0×10^20[5]	(β^+β^+)	0.846
200	^110Pd	110	46	64	8.874500	> 9.1×10^27	> 2.9×10^20[5]	(β^−β^−)	2.000
201	^92Mo	92	42	50	9.014860	> 6.0×10^27	> 1.9×10^20[5]	(β^+β^+)	1.649
202	^204Pb	204	82	122	8.194414	> 4.4×10^27	> 1.4×10^20[6]	(α)	1.972
203	^112Sn	112	50	62	8.862944	> 3.1×10^27	> 9.7×10^19[10]	(β^+β^+)	1.922
204	^96Ru	96	44	52	8.967911	> 2.5×10^27	> 8.0×10^19[5]	(β^+β^+)	2.719
205	^192Os	192	76	116	8.258202	> 1.7×10^27	> 5.3×10^19[5]	(β^−β^−, α)	0.413, 0.362
206	^198Pt	198	78	120	8.222378	> 1.0×10^27	> 3.2×10^19[11]	(β^−β^−, α)	1.047, 0.087
207	^160Gd	160	64	96	8.496009	> 9.8×10^26	> 3.1×10^19[5]	(β^−β^−)	1.729
208	^144Sm	144	62	82	8.640577	> 4.4×10^26	> 1.4×10^19[12]	(β^+β^+)	1.781
209	^190Os	190	76	114	8.275045	> 3.8×10^26	> 1.2×10^19[13]	(α)	1.378
210	^64Zn	64	30	34	9.102634	> 3.5×10^26	> 1.1×10^19[14]	(β^+β^+)	1.096
211	^74Se	74	34	40	9.047175	> 2.2×10^26	> 7.0×10^18[15]	(β^+β^+)	1.209
212	^186W	186	74	112	8.299873	> 1.3×10^26	> 4.1×10^18[5]	(α)	1.123
213	^70Zn	70	30	40	9.065109	> 1.2×10^26	> 3.8×10^18[5]	(β^−β^−)	0.998
214	^188Os	188	76	112	8.290138	> 1.0×10^26	> 3.3×10^18[13]	(α)	2.143
215	^143Nd	143	60	83	8.658792	> 9.8×10^25	> 3.1×10^18[5]	(α)	0.521
216	^148Nd	148	60	88	8.594388	> 9.5×10^25	> 3.0×10^18[5]	(β^−β^−, α)	1.929, 0.599
217	^142Ce	142	58	84	8.666666	> 9.1×10^25	> 2.9×10^18[5]	(β^−β^−, α)	1.417, 1.298
218	^179Hf	179	72	107	8.353293	> 8.5×10^25	> 2.7×10^18[16]	(α)	1.806
219	^196Hg	196	80	116	8.233710	> 7.9×10^25	> 2.5×10^18[5]	(β^+β^+, α)	0.820, 2.027
220	^154Sm	154	62	92	8.541857	> 7.3×10^25	> 2.3×10^18[5]	(β^−β^−)	1.251
221	^146Nd	146	60	86	8.625649	> 5.0×10^25	> 1.6×10^18[5]	(β^−β^−, α)	0.070, 1.182
222	^50Cr	50	24	26	9.076517	> 4.1×10^25	> 1.3×10^18[5]	(β^+β^+)	1.167
223	^178Hf	178	72	106	8.365958	> 4.1×10^25	> 1.3×10^18[16]	(α)	2.083
224	^177Hf	177	72	105	8.370139	> 3.5×10^25	> 1.1×10^18[16]	(α)	2.245
225	^156Dy	156	66	90	8.523443	> 3.2×10^25	> 1.0×10^18[5]	(β^+β^+, α)	2.011, 1.758
226	^153Eu	153	63	90	8.550893	> 1.8×10^25	> 5.5×10^17[5]	(α)	0.274
227	^180Hf	180	72	108	8.347930	> 1.5×10^25	> 4.6×10^17[16]	(α)	1.283
228	^108Cd	108	48	60	8.897735	> 1.3×10^25	> 4.1×10^17[5]	(β^+β^+)	0.272
229	^170Er	170	68	102	8.424945	> 1.3×10^25	> 4.1×10^17[5]	(β^−β^−, α)	0.654, 0.050
230	^138Ce	138	58	80	8.705878	> 1.3×10^25	> 4.0×10^17[17]	(β^+β^+)	0.694
231	^180mTa	180	73	107	8.342767	> 9.1×10^24	> 2.9×10^17[18]	(β^−, ε, IT, α)	0.783, 0.929, 2.103
232	^176Hf	176	72	104	8.381427	> 8.5×10^24	> 2.7×10^17[16]	(α)	2.255
233	^46Ca	46	20	26	9.009047	> 5.7×10^24	> 1.8×10^17[19]	(β^−β^−)	0.988
234	^176Yb	176	70	106	8.375271	> 5.0×10^24	> 1.6×10^17[5]	(β^−β^−, α)	1.083, 0.570
235	^94Zr	94	40	54	8.999698	> 3.5×10^24	> 1.1×10^17[5]	(β^−β^−)	1.144
236	^124Sn	124	50	74	8.782914	> 3.2×10^24	> 1.0×10^17[5]	(β^−β^−)	2.287
237	^162Dy	162	66	96	8.492234	> 3.2×10^24	> 1.0×10^17[20]	(α)	0.085
238	^136Ce	136	58	78	8.707122	> 3.0×10^24	> 9.6×10^16[17]	(β^+β^+)	2.419
239	^114Cd	114	48	66	8.860985	> 2.9×10^24	> 9.2×10^16[5]	(β^−β^−)	0.540
240	^123Te	123	52	71	8.796302	> 2.9×10^24	> 9.2×10^16[21]	(ε)	0.052
241	^145Nd	145	60	85	8.632963	> 1.9×10^24	> 6.0×10^16[5]	(α)	1.578
242	^192Pt	192	78	114	8.260353	> 1.9×10^24	> 6.0×10^16[5]	(α)	2.418
243	^161Dy	161	66	95	8.494067	> 1.1×10^24	> 3.5×10^16[20]	(α)	0.344
244	^160Dy	160	66	94	8.506816	> 2.7×10^23	> 8.5×10^15[20]	(α)	0.439
245	^189Os	189	76	113	8.277599	> 1.1×10^23	> 3.5×10^15[13]	(α)	1.976
246	^187Os	187	76	111	8.291746	> 1.0×10^23	> 3.2×10^15[13]	(α)	2.720
247	^149Sm	149	62	87	8.589058	> 6.3×10^22	> 2.0×10^15[5]	(α)	1.870
248	^158Dy	158	66	92	8.516973	> 3.2×10^22	> 1.0×10^15[20]	(β^+β^+, α)	0.283, 0.875
249	^162Er	162	68	94	8.480852	> 4.4×10^21	> 1.4×10^14[5]	(β^+β^+, α)	1.844, 1.646
250	^168Yb	168	70	98	8.437845	> 4.1×10^21	> 1.3×10^14[5]	(β^+β^+, α)	1.422, 1.951
251	^98Mo	98	42	56	8.970426	> 3.2×10^21	> 1.0×10^14[5]	(β^−β^−)	0.112

Primordial radioactive nuclides (half-life > 10⁸ years)

Main article: Primordial nuclide

Ordered by half-life.

No.	Nuclide	A	Z	N	Energy	Half-life		Decay mode	Decay energy (MeV)
						(seconds)	(years)
252	^128Te	128	52	76	8.743261	6.94×10^31	2.2×10^24	β^−β^−	0.868
253	^124Xe	124	54	70	8.778264	5.68×10^29	1.8×10^22	εε	2.864
254	^78Kr	78	36	42	9.022349	2.90×10^29	9.2×10^21	εε	2.846
255	^136Xe	136	54	82	8.706805	7.5×10^28	2.38×10^21	β^−β^−	2.462
256	^76Ge	76	32	44	9.034656	5.642×10^28	1.8×10^21	β^−β^−	2.039
257	^130Ba	130	56	74	8.742574	3.79×10^28	1.2×10^21	εε	2.620
258	^130Te	130	52	78	8.766578	2.496×10^28	7.91×10^20	β^−β^−	2.530
259	^82Se	82	34	48	9.017596	3.408×10^27	1.1×10^20	β^−β^−	2.995
260	^48Ca	48	20	28	8.992452	1.766×10^27	5.6×10^19[5]	β^−β^−	4.274
261	^116Cd	116	48	68	8.836146	9.783×10^26	3.1×10^19	β^−β^−	2.809
262	^209Bi	209	83	126	8.158689	6.343×10^26	2.01×10^19	α	3.137
263	^96Zr	96	40	56	8.961359	6.3×10^26	2.0×10^19	β^−β^−	3.348
264	^150Nd	150	60	90	8.562594	2.935×10^26	9.3×10^18[5]	β^−β^−	3.367
265	^100Mo	100	42	58	8.933167	2.231×10^26	7.07×10^18[5]	β^−β^−	3.035
266	^151Eu	151	63	88	8.565759	1.458×10^26	4.62×10^18	α	1.964
267	^180W	180	74	106	8.347127	5.680×10^25	1.8×10^18	α	2.509
268	^50V	50	23	27	9.055759	8.552×10^24	2.71×10^17	β^+, β^−	2.205, 1.038
269	^174Hf	174	72	102	8.392287	2.2×10^24	7.0×10^16[22]	α	2.497
270	^113Cd	113	48	65	8.859372	2.430×10^23	7.7×10^15	β^−	0.321
271	^148Sm	148	62	86	8.607423	1.988×10^23	6.3×10^15	α	1.986
272	^144Nd	144	60	84	8.652947	7.227×10^22	2.29×10^15	α	1.905
273	^186Os	186	76	110	8.302508	6.312×10^22	2.0×10^15	α	2.823
274	^115In	115	49	66	8.849910	1.392×10^22	4.4×10^14	β^−	0.499
275	^152Gd	152	64	88	8.562868	3.408×10^21	1.1×10^14	α	2.203
276	^184Os	184	76	108	8.311850	3.53×10^20	1.12×10^13	α	2.963
277	^190Pt	190	78	112	8.267764	1.524×10^19	4.83×10^11	α	3.252
278	^147Sm	147	62	85	8.610593	3.364×10^18	1.066×10^11	α	2.310
279	^138La	138	57	81	8.698320	3.250×10^18	1.03×10^11	β^+, β^−	1.737, 1.044
280	^87Rb	87	37	50	9.043718	1.568×10^18	4.97×10^10	β^−	0.283
281	^187Re	187	75	112	8.291732	1.300×10^18	4.12×10^10	β^−	0.0026
282	^176Lu	176	71	105	8.374665	1.187×10^18	3.764×10^10	β^−, β^+[5]	1.193
283	^232Th	232	90	142	7.918533	4.434×10^17	1.406×10^10	α, SF	4.083
284	^238U	238	92	146	7.872551	1.410×10^17	4.471×10^9	α, SF, β^−β^−	4.270
285	^40K	40	19	21	8.909707	3.938×10^16	1.25×10^9	β^−, β^+	1.311, 1.505, 1.505
286	^235U	235	92	143	7.897198	2.222×10^16	7.04×10^8	α, SF	4.679

Radionuclides with half-lives of 10,000 years to 10⁸ years

Ordered by half-life. Some of these are known to have been present in the early Solar System (marked "ESS", meaning the first few million years of the Solar System's history), because of an excess of their decay products.^[23]

No.	Nuclide	Z	N	Energy	Half-life		Decay mode	Notes
					(seconds)	(years)
287	^146Sm	62	84	8.626136	2.903×10^15	9.20×10^7[2]	α	ESS[23]
288	^244Pu	94	150	7.826221	2.525×10^15	8.0×10^7	α, SF	interstellar,[24] ESS[23]
289	^92Nb	41	51	9.010980	1.095×10^15	3.47×10^7	β^+, β^−	CG,[25] ESS[23]
290	^236U	92	144	7.891470	7.391×10^14	2.34×10^7	α, SF	DP
291	^205Pb	82	123	8.187279	5.459×10^14	1.73×10^7	β^+	ESS[23]
292	^129I	53	76	8.757397	4.955×10^14	1.57×10^7	β^−	CG, FP, ESS[23]
293	^247Cm	96	151	7.806008	4.923×10^14	1.56×10^7	α	ESS[23]
294	^182Hf	72	110	8.324399	2.809×10^14	8.90×10^6	β^−	ESS[23]
295	^107Pd	46	61	8.897197	2.051×10^14	6.50×10^6	β^−	FP, ESS[23]
296	^97Tc	43	54	8.970503	1.329×10^14	4.21×10^6	β^+
297	^98Tc	43	55	8.953246	1.325×10^14	4.20×10^6	β^−
298	^53Mn	25	28	9.103175	1.180×10^14	3.74×10^6	β^+	CG, ESS[23]
299	^60Fe	26	34	9.094861	8.268×10^13	2.62×10^6	β^−	CG,[26] interstellar,[27] ESS[23]
300	^210mBi	83	127	8.140473	9.594×10^13	3.04×10^6	α
301	^237Np	93	144	7.881989	6.766×10^13	2.14×10^6	α, SF	DP
302	^150Gd	64	86	8.576454	5.649×10^13	1.79×10^6	α
303	^93Zr	40	53	9.008069	4.828×10^13	1.53×10^6	β^−	FP
304	^154Dy	66	88	8.528457	4.415×10^13	1.40×10^6[28]	α
305	^10Be	4	6	6.810657	4.377×10^13	1.387×10^6	β^−	CG, ESS[23]
306	^135Cs	55	80	8.720082	4.194×10^13	1.33×10^6[5]	β^−	FP
307	^26Al	13	13	8.540954	2.263×10^13	717000	β^+	CG, ESS[23]
308	^242Pu	94	148	7.845218	1.183×10^13	375000	α, SF
309	^208Bi	83	125	8.162049	1.161×10^13	368000	β^+
310	^248Cm	96	152	7.799586	1.098×10^13	348000	α, SF
311	^36Cl	17	19	8.891380	9.499×10^12	301000	β^−, β^+	CG, IM
312	^79Se	34	45	9.032310	9.309×10^12	295000	β^−	FP
313	^234U	92	142	7.908308	7.747×10^12	245500	α, SF	DP
314	^126Sn	50	76	8.754026	7.258×10^12	223000	β^−	FP
315	^81Kr	36	45	9.030513	7.227×10^12	229000	β^+	CG
316	^99Tc	43	56	8.953379	6.662×10^12	211100	β^−	FP, DP
317	^186mRe	75	111	8.295958	6.312×10^12	200000	IT
318	^233U	92	141	7.912873	5.024×10^12	159200	α, SF	DP
319	^236Np	93	143	7.887514	4.860×10^12	154000	β^+, β^−, α
320	^41Ca	20	21	8.928347	3.219×10^12	102000	β^+	CG, ESS[23]
321	^59Ni	28	31	9.107863	2.398×10^12	76000	β^+
322	^230Th	90	140	7.937136	2.379×10^12	75400	α, SF	DP
323	^137La	57	80	8.707101	1.893×10^12	60000	β^+
324	^202Pb	82	120	8.199714	1.657×10^12	52500	β^+
325	^231Pa	91	140	7.926627	1.034×10^12	32770	α, SF	DP
326	^239Pu	94	145	7.868022	7.609×10^11	24110	α, SF	IM, DP
327	^94Nb	41	53	8.990099	6.406×10^11	20300	β^−	CG[25]

Radionuclides with half-lives of 10 years to 10,000 years

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life (years)	decay mode	notes
328	^250Cm	96	154	7.779371	2.619×10^11	8300	SF, α, β^−
329	^245Cm	96	149	7.822329	2.60×10^11	8250	α, SF
330	^243Am	95	148	7.836035	2.326×10^11	7371	α, SF
331	^229Th	90	139	7.942127	2.316×10^11	7339	α	DP
332	^240Pu	94	146	7.862465	2.070×10^11	6560	α, SF	DP
333	^14C	6	8	7.855620	1.799×10^11	5700	β^−	CG, IM
334	^93Mo	42	51	9.004693	1.53×10^11	4839[29]	β^+
335	^246Cm	96	150	7.816781	1.502×10^11	4760	α, SF
336	^163Ho	67	96	8.478591	1.442×10^11	4570	β^+
337	^226Ra	88	138	7.966597	5.049×10^10	1600	α	DP
338	^247Bk	97	150	7.806182	4.355×10^10	1380	α
339	^166mHo	67	99	8.451273	3.787×10^10	1200	β^−
340	^251Cf	98	153	7.775969	2.834×10^10	898	α, SF
341	^91Nb	41	50	9.023327	2.146×10^10	680	β^+
342	^194Hg	80	114	8.237271	1.401×10^10	444	β^+
343	^108mAg	47	61	8.881439	1.382×10^10	437.9	β^+, IT
344	^241Am	95	146	7.851676	1.364×10^10	432.2	α, SF	IM
345	^249Cf	98	151	7.791305	1.108×10^10	351.1	α, SF
346	^39Ar	18	21	8.923686	8.489×10^9	269	β^−	CG
347	^192mIr	77	115	8.251875	7.605×10^9	241	IT
348	^158Tb	65	93	8.511055	5.680×10^9	180	β^+, β^−
349	^242mAm	95	147	7.841913	4.450×10^9	141	IT, α, SF
350	^32Si	14	18	8.823856	4.166×10^9	132	β^−	CG
351	^209Po	84	125	8.149633	3.913×10^9	124	α, β^+
352	^63Ni	28	35	9.111210	3.159×10^9	101	β^−	IM
353	^151Sm	62	89	8.565251	2.840×10^9	90.0	β^−	FP
354	^238Pu	94	144	7.877358	2.768×10^9	87.7	α, SF	IM, DP
355	^148Gd	64	84	8.586706	2.74×10^9	86.9[30]	α
356	^157Tb	65	92	8.522096	2.241×10^9	71.0	β^+
357	^232U	92	140	7.922143	2.174×10^9	68.9	α, SF
358	^44Ti	22	22	8.924702	1.893×10^9	59.1	β^+
359	^193Pt	78	115	8.249965	1.578×10^9	50.0	β^+
360	^121mSn	50	71	8.808499	1.385×10^9	43.89	IT, β^−
361	^150Eu	63	87	8.569974	1.164×10^9	36.89	β^+
362	^42Ar	18	24	8.890923	1.038×10^9	32.9	β^−
363	^207Bi	83	124	8.168209	1.038×10^9	31.6	β^+
364	^178m2Hf	72	106		9.776×10^8	31	IT
365	^137Cs	55	82	8.703047	9.477×10^8	30.1	β^−	FP, IM
366	^243Cm	96	147	7.836004	9.183×10^8	29.1	α, β^+, SF
367	^90Sr	38	52	9.026239	9.120×10^8	28.9	β^−	FP, IM
368	^210Pb	82	128	8.141462	7.006×10^8	22.2	β^−, α	DP, IM
369	^227Ac	89	138	7.957447	6.871×10^8	21.77	β^−, α	DP
370	^244Cm	96	148	7.831763	5.712×10^8	18.1	α, SF
371	^145Pm	61	84	8.631838	5.586×10^8	17.7	β^+, α
372	^93mNb	41	52		5.084×10^8	16.1	IT
373	^241Pu	94	147	7.851590	4.510×10^8	14.3	β^−, α, SF
374	^113mCd	48	65		4.380×10^8	13.9	β^−, IT	FP
375	^152Eu	63	89	8.550897	4.262×10^8	13.51	β^+, β^−
376	^250Cf	98	152	7.786640	4.128×10^8	13.08	α, SF
377	^3H	1	2	3.087994	3.888×10^8	12.32	β^−	CG, IM
378	^85Kr	36	49	9.029919	3.384×10^8	10.72	β^−	FP, IM
379	^133Ba	56	77	8.729624	3.319×10^8	10.52	β^+

Radionuclides with half-lives of 1 day to 10 years

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life	decay mode	notes
380	^248Bk	97	151	7.796811	> 2.84×10^8	> 9 y	α
381	^154Eu	63	91	8.537200	2.711×10^8	8.60 y	β^−, β^+
382	^194Os	76	118	8.238508	1.893×10^8	6.0 y	β^−
383	^228Ra	88	140	7.944390	1.815×10^8	5.75 y	β^−	DP
384	^146Pm	61	85	8.615574	1.745×10^8	5.53 y	β^+, β^−
385	^60Co	27	33	9.098811	1.663×10^8	5.27 y	β^−	IM
386	^155Eu	63	92	8.534711	1.500×10^8	4.75 y	β^−	FP
387	^204Tl	81	123	8.190671	1.193×10^8	3.78 y	β^−, β^+	IM
388	^174Lu	71	103	8.390726	1.045×10^8	3.31 y	β^+
389	^101Rh	45	56	8.936753	1.041×10^8	3.3 y	β^+
390	^102mRh	45	57	8.920680	9.152×10^7	2.9 y	β^+, IT
391	^208Po	84	124	8.155315	9.145×10^7	2.898 y	α, β^+
392	^236Pu	94	142	7.889536	9.019×10^7	2.858 y	α, SF
393	^125Sb	51	74	8.777367	8.705×10^7	2.759 y	β^−	FP
394	^55Fe	26	29	9.116407	8.637×10^7	2.737 y	β^+
395	^252Cf	98	154	7.769605	8.347×10^7	2.645 y	α, SF	IM
396	^147Pm	61	86	8.609068	8.279×10^7	2.624 y	β^−	FP, DP
397	^22Na	11	11	8.306891	8.213×10^7	2.603 y	β^+	CG
398	^134Cs	55	79	8.719768	6.517×10^7	2.065 y	β^−, β^+	FP
399	^171Tm	69	102	8.417620	6.059×10^7	1.92 y	β^−
400	^228Th	90	138	7.953906	6.033×10^7	1.912 y	α	DP
401	^172Hf	72	100	8.399252	5.901×10^7	1.87 y	β^+
402	^179Ta	73	106	8.352703	5.743×10^7	1.82 y	β^+
403	^173Lu	71	102	8.400147	4.323×10^7	1.37 y	β^+
404	^252Es	99	153	7.764621	4.075×10^7	1.291 y	α, β^+, β^−
405	^109Cd	48	61	8.883327	3.986×10^7	1.263 y	β^+
406	^235Np	93	142	7.896669	3.422×10^7	1.084 y	β^+, α
407	^106Ru	44	62	8.885686	3.228×10^7	1.023 y	β^−	FP
408	^144Pm	61	83	8.636751	3.136×10^7	363 d	β^+
409	^145Sm	62	83	8.627590	2.938×10^7	340 d	β^+
410	^248Cf	98	150	7.800198	2.881×10^7	333.4 d	α, SF
411	^249Bk	97	152	7.790805	2.851×10^7	330 d	β^−, α, SF
412	^49V	23	26	9.050040	2.843×10^7	329.1 d	β^+
413	^54Mn	25	29	9.100131	2.697×10^7	312.2 d	β^+, β^−	IM
414	^119m1Sn	50	69		2.534×10^7	293.1 d	IT
415	^144Ce	58	86	8.629918	2.462×10^7	285 d	β^−	FP
416	^254Es	99	155	7.748524	2.382×10^7	275.7 d	α, β^−, SF, β^+
417	^57Co	27	30	9.112454	2.348×10^7	271.8 d	β^+	IM
418	^68Ge	32	36	9.056327	2.341×10^7	271 d	β^+	IM
419	^143Pm	61	82	8.651509	2.290×10^7	265 d	β^+
420	^110mAg	47	63	8.865355	2.158×10^7	249.8 d	β^−, IT
421	^65Zn	30	35	9.085352	2.105×10^7	243.6 d	β^+	IM
422	^153Gd	64	89	8.547731	2.077×10^7	240.4 d	β^+	IM
423	^102Rh	45	57		1.788×10^7	207 d	β^+, β^−
424	^195Au	79	116	8.238353	1.608×10^7	186.1 d	β^+
425	^194mIr	77	117	8.238025	1.477×10^7	170.9 d	β^−
426	^184mRe	75	109	8.310670	1.460×10^7	169 d	IT, β^+
427	^242Cm	96	146	7.844860	1.407×10^7	162.8 d	α, SF
428	^45Ca	20	25	8.978261	1.405×10^7	162.6 d	β^−
429	^177mLu	71	106	8.361829	1.386×10^7	160.4 d	β^−, IT
430	^121mTe	52	69	8.800749	1.331×10^7	154.1 d	IT, β^+
431	^159Dy	66	93	8.506378	1.248×10^7	144.4 d	β^+
432	^174m1Lu	71	103		1.227×10^7	142 d	IT, EC
433	^210Po	84	126	8.147295	1.196×10^7	138.4 d	α	DP
434	^139Ce	58	81	8.696881	1.189×10^7	137.6 d	β^+
435	^123Sn	50	73	8.785311	1.116×10^7	129.2 d	β^−
436	^170Tm	69	101	8.423096	1.111×10^7	128.6 d	β^−, β^+
437	^151Gd	64	87	8.562685	1.071×10^7	124 d	β^+, α
438	^181W	74	107	8.337924	1.047×10^7	121.2 d	β^+
439	^75Se	34	41	9.033581	1.035×10^7	119.8 d	β^+	IM
440	^123mTe	52	71		1.03×10^7	119.2 d	IT
441	^113Sn	50	63	8.853035	9.944×10^6	115.1 d	β^+
442	^182Ta	73	109	8.326456	9.887×10^6	114.4 d	β^−
443	^127mTe	52	75	8.765759	9.418×10^6	109 d	IT, β^−
444	^88Y	39	49	9.029272	9.212×10^6	106.6 d	β^+
445	^257Fm	100	157	7.726619	8.683×10^6	100.5 d	α, SF
446	^185Os	76	109	8.302730	8.087×10^6	93.6 d	β^+
447	^168Tm	69	99	8.436316	8.044×10^6	93.1 d	β^+, β^−
448	^149Eu	63	86	8.584395	8.044×10^6	93.1 d	β^+
449	^97mTc	43	54		7.862×10^6	91 d	IT, EC
450	^35S	16	19	8.895510	7.561×10^6	87.51 d	β^−	CG
451	^83Rb	37	46	9.024038	7.448×10^6	86.2 d	β^+
452	^46Sc	21	25	8.979091	7.239×10^6	83.78 d	β^−
453	^88Zr	40	48	9.021589	7.206×10^6	83.4 d	β^+
454	^73As	33	40	9.043341	6.938×10^6	80.3 d	β^+
455	^56Co	27	29	9.072031	6.673×10^6	77.23 d	β^+
456	^185W	74	111	8.305866	6.489×10^6	75.1 d	β^−
457	^192Ir	77	115		6.379×10^6	73.827 d	β^−, EC	IM
458	^160Tb	65	95	8.495346	6.247×10^6	72.3 d	β^−
459	^58Co	27	31	9.103153	6.122×10^6	70.86 d	β^+
460	^183Re	75	108	8.321661	6.048×10^6	70 d	β^+
461	^175Hf	72	103	8.382665	6.048×10^6	70 d	β^+
462	^188W	74	114	8.277003	6.029×10^6	69.78 d	β^−
463	^85Sr	38	47	9.025480	5.602×10^6	64.84 d	β^+
464	^95Zr	40	55	8.972989	5.532×10^6	64.03 d	β^−	FP
465	^95mTc	43	52	8.976359	5.270×10^6	61 d	β^+, IT
466	^91mNb	41	50		5.258×10^6	60.86 d	IT, EC
467	^254Cf	98	156	7.751087	5.227×10^6	60.5 d	SF, α
468	^124Sb	51	73	8.777943	5.194×10^6	60.12 d	β^−
469	^125I	53	72	8.782019	5.132×10^6	59.4 d	β^+	IM
470	^91Y	39	52	9.020174	5.055×10^6	58.51 d	β^−	FP
471	^125mTe	52	73		4.959×10^6	57.4 d	IT
472	^148Eu	63	85	8.586882	4.709×10^6	54.5 d	β^+, α
473	^7Be	4	3	5.818470	4.598×10^6	53.22 d	β^+	CG
474	^258Md	101	157	7.715948	4.450×10^6	51.5 d	α, SF
475	^89Sr	38	51	9.039969	4.369×10^6	50.57 d	β^−	FP, IM
476	^114mIn	49	65	8.846608	4.278×10^6	49.51 d	IT, β^+
477	^146Gd	64	82	8.592512	4.171×10^6	48.28 d	β^+
478	^203Hg	80	123	8.195806	4.026×10^6	46.6 d	β^−
479	^237Pu	94	143	7.881060	3.905×10^6	45.2 d	β^+, α
480	^115mCd	48	67	8.835754	3.850×10^6	44.56 d	β^−
481	^59Fe	26	33	9.099516	3.844×10^6	44.49 d	β^−	IM
482	^181Hf	72	109	8.333272	3.662×10^6	42.38 d	β^−
483	^148mPm	61	87	8.589800	3.567×10^6	41.28 d	β^−, IT
484	^105Ag	47	58	8.900547	3.567×10^6	41.28 d	β^+
485	^255Es	99	156	7.741567	3.439×10^6	39.8 d	β^−, α, SF
486	^103Ru	44	59	8.918500	3.392×10^6	39.26 d	β^−	FP
487	^127Xe	54	73	8.766768	3.145×10^6	36.4 d	β^+
488	^184Re	75	109		3.059×10^6	35.4 d	β^+
489	^95Nb	41	54	8.984821	3.023×10^6	34.99 d	β^−	FP
490	^37Ar	18	19	8.907752	3.020×10^6	34.95 d	β^+	CG
491	^129mTe	52	77	8.744953	2.903×10^6	33.6 d	IT, β^−
492	^84Rb	37	47	9.020732	2.860×10^6	33.1 d	β^+, β^−
493	^241Cm	96	145	7.848492	2.834×10^6	32.8 d	β^+, α
494	^141Ce	58	83	8.677286	2.809×10^6	32.51 d	β^−	FP
495	^169Yb	70	99	8.428546	2.767×10^6	32.03 d	β^+	IM
496	^260Md	101	159	7.699789	2.748×10^6	31.81 d	SF, α, β^+, β^−
497	^51Cr	24	27	9.080127	2.393×10^6	27.7 d	β^+	IM
498	^240Cm	96	144	7.855805	2.333×10^6	27 d	α, β^+, SF
499	^233Pa	91	142	7.910426	2.331×10^6	26.98 d	β^−	DP
500	^82Sr	38	44	8.998254	2.208×10^6	25.56 d	β^+	IM
501	^33P	15	18	8.869434	2.189×10^6	25.34 d	β^−
502	^179m2Hf	72	107		2.164×10^6	25.05 d	IT
503	^234Th	90	144	7.897763	2.082×10^6	24.1 d	β^−	DP
504	^147Eu	63	84	8.598879	2.082×10^6	24.1 d	β^+, α
505	^178W	74	104	8.354563	1.866×10^6	21.6 d	β^+
506	^230U	92	138	7.933871	1.797×10^6	20.8 d	α, SF
507	^253Es	99	154	7.759019	1.769×10^6	20.5 d	α, SF
508	^121Te	52	69		1.656×10^6	19.2 d	ε
509	^227Th	90	137	7.957644	1.614×10^6	18.7 d	α	DP
510	^86Rb	37	49	9.033502	1.611×10^6	18.6 d	β^−, β^+
511	^253Cf	98	155	7.757885	1.539×10^6	17.8 d	β^−, α
512	^74As	33	41	9.028895	1.535×10^6	17.8 d	β^+, β^−
513	^230Pa	91	139	7.931436	1.503×10^6	17.4 d	β^+, β^−, α
514	^103Pd	46	57	8.920638	1.468×10^6	17.0 d	β^+	IM
515	^99Rh	45	54	8.935711	1.391×10^6	16.1 d	β^+
516	^48V	23	25	8.997890	1.380×10^6	15.97 d	β^+
517	^191Os	76	115	8.261870	1.331×10^6	15.41 d	β^−
518	^205Bi	83	122	8.174069	1.323×10^6	15.31 d	β^+
519	^156Eu	63	93	8.520642	1.312×10^6	15.19 d	β^−
520	^225Ra	88	137	7.973576	1.287×10^6	14.9 d	β^−	DP
521	^32P	15	17	8.830865	1.232×10^6	14.268 d	β^−	CG, IM
522	^117mSn	50	67		1.21×10^6	14 d	IT
523	^143Pr	59	84	8.652258	1.172×10^6	13.56 d	β^−
524	^189Ir	77	112	8.274783	1.140×10^6	13.19 d	β^+
525	^136Cs	55	81	8.706171	1.127×10^6	13.04 d	β^−
526	^126I	53	73	8.769026	1.117×10^6	12.93 d	β^+, β^−
527	^140Ba	56	84	8.666120	1.102×10^6	12.75 d	β^−	FP
528	^126Sb	51	75	8.757042	1.067×10^6	12.35 d	β^−
529	^202Tl	81	121	8.199956	1.057×10^6	12.23 d	β^+
530	^131mXe	54	77		1.023×10^6	11.84 d	IT
531	^190Ir	77	113	8.264755	1.018×10^6	11.78 d	β^+
532	^131Ba	56	75	8.733037	9.936×10^5	11.5 d	β^+
533	^223Ra	88	135	7.994042	9.876×10^5	11.43 d	α	DP, IM
534	^71Ge	32	39	9.055943	9.876×10^5	11.43 d	β^+
535	^147Nd	60	87	8.602973	9.487×10^5	10.98 d	β^−
536	^246Pu	94	152	7.805494	9.366×10^5	10.84 d	β^−
537	^193mIr	77	116		9.098×10^5	10.53 d	IT
538	^188Pt	78	110	8.272514	8.813×10^5	10.2 d	β^+, α
539	^92mNb	41	51		8.770×10^5	10.15 d	β^+, α
540	^225Ac	89	136	7.975159	8.571×10^5	9.92 d	α	DP
541	^131Cs	55	76	8.743541	8.371×10^5	9.69 d	β^+	IM
542	^125Sn	50	75	8.758515	8.329×10^5	9.64 d	β^−
543	^169Er	68	101	8.431852	8.115×10^5	9.39 d	β^−	IM
544	^149Gd	64	85	8.575576	8.018×10^5	9.28 d	β^+, α
545	^167Tm	69	98	8.445866	7.992×10^5	9.25 d	β^+
546	^129mXe	54	75		7.672×10^5	8.88 d	IT
547	^206Po	84	122	8.159590	7.603×10^5	8.80 d	β^+, α
548	^72Se	34	38	9.014300	7.258×10^5	8.40 d	β^+
549	^106mAg	47	59	8.890639	7.154×10^5	8.28 d	β^+
550	^171Lu	71	100	8.409532	7.119×10^5	8.24 d	β^+
551	^131I	53	78	8.738842	6.930×10^5	8.02 d	β^−	FP, IM
552	^257Es	99	158	7.723468	6.653×10^5	7.7 d	β^−, SF
553	^111Ag	47	64	8.866111	6.437×10^5	7.45 d	β^−
554	^161Tb	65	96	8.490383	5.967×10^5	6.91 d	β^−
555	^237U	92	145	7.879800	5.832×10^5	6.75 d	β^−	DP
556	^172Lu	71	101	8.401217	5.789×10^5	6.70 d	β^+	IM
557	^177Lu	71	106		5.743×10^5	6.65 d	β^−
558	^132Cs	55	77	8.731599	5.599×10^5	6.48 d	β^+, β^−
559	^206Bi	83	123	8.168551	5.394×10^5	6.24 d	β^+
560	^196Au	79	117	8.230205	5.328×10^5	5.17 d	β^+, β^−
561	^56Ni	28	28	9.033899	5.249×10^5	6.08 d	β^+
562	^118Te	52	66	8.814726	5.184×10^5	6 d	β^+
563	^145Eu	63	82	8.609245	5.124×10^5	5.93 d	β^+
564	^120mSb	51	69	8.808194	4.977×10^5	5.76 d	β^+
565	^52Mn	25	27	9.046431	4.831×10^5	5.59 d	β^+
566	^148Pm	61	87		4.638×10^5	5.37 d	β^−
567	^156Tb	65	91	8.520667	4.622×10^5	5.35 d	β^+
568	^155Tb	65	90	8.531031	4.596×10^5	5.32 d	β^+
569	^133Xe	54	79	8.730302	4.530×10^5	5.24 d	β^−	IM
570	^183Ta	73	110	8.318847	4.406×10^5	5.10 d	β^−
571	^210Bi	83	127		4.330×10^5	5.01 d	β^−, α	DP
572	^245Bk	97	148	7.819020	4.268×10^5	4.94 d	β^+, α
573	^119mTe	52	67	8.801773	4.061×10^5	4.7 d	β^+, IT
574	^146Eu	63	83	8.599560	3.983×10^5	4.61 d	β^+
575	^47Ca	20	27	8.972181	3.919×10^5	4.54 d	β^−
576	^234Np	93	141	7.900571	3.802×10^5	4.4 d	β^+
577	^101mRh	45	56		3.74×10^5	4.34 d	ε, IT
578	^193mPt	78	115		3.74×10^5	4.33 d	IT
579	^96Tc	43	53	8.965255	3.698×10^5	4.28 d	β^+
580	^231U	92	139	7.924977	3.629×10^5	4.2 d	β^+, α
581	^175Yb	70	105	8.383902	3.616×10^5	4.19 d	β^−
582	^124I	53	71	8.775884	3.608×10^5	4.18 d	β^+	IM
583	^195mPt	78	117		3.46×10^5	4.01 d	IT
584	^127Sb	51	76	8.754005	3.326×10^5	3.85 d	β^−
585	^222Rn	86	136	7.997573	3.304×10^5	3.82 d	α	DP
586	^186Re	75	111		3.21×10^5	3.72 d	β−,e	IM
587	^224Ra	88	136	7.987277	3.138×10^5	3.63 d	α	DP
588	^100Pd	46	54	8.923587	3.136×10^5	3.63 d	β^+
589	^95mNb	41	54		3.11×10^5	3.61 d	IT, β−
590	^166Dy	66	100	8.448376	2.938×10^5	3.4 d	β^−
591	^140Nd	60	80	8.673113	2.912×10^5	3.37 d	β^+
592	^47Sc	21	26	9.014564	2.894×10^5	3.35 d	β^−
593	^87Y	39	48	9.025565	2.873×10^5	3.33 d	β^+
594	^89Zr	40	49	9.024912	2.823×10^5	3.27 d	β^+
595	^67Ga	31	36	9.069532	2.819×10^5	3.26 d	β^+	IM
596	^132Te	52	80	8.716646	2.768×10^5	3.2 d	β^−	FP
597	^134Ce	58	76	8.704432	2.730×10^5	3.16 d	β^+
598	^199Au	79	120	8.217534	2.712×10^5	3.14 d	β^−
599	^201Tl	81	120	8.206561	2.625×10^5	3.04 d	β^+	IM
600	^253Fm	100	153	7.757691	2.592×10^5	3. d	β^+, α
601	^191Pt	78	113	8.258228	2.473×10^5	2.86 d	β^+
602	^111In	49	62	8.867688	2.423×10^5	2.8 d	β^+	IM
603	^97Ru	44	53	8.959080	2.411×10^5	2.79 d	β^+
604	^99Mo	42	57	8.939669	2.375×10^5	2.75 d	β^−	FP, IM
605	^122Sb	51	71	8.795346	2.353×10^5	2.72 d	β^−, β^+
606	^71As	33	38	9.027581	2.350×10^5	2.72 d	β^+
607	^198Au	79	119	8.220732	2.329×10^5	2.7 d	β^−	IM
608	^197Hg	80	117	8.226358	2.309×10^5	2.67 d	β^+
609	^90Y	39	51	9.032294	2.306×10^5	2.67 d	β^−	IM
610	^182Re	75	107	8.321053	2.304×10^5	2.67 d	β^+
611	^172Tm	69	103	8.404932	2.290×10^5	2.65 d	β^−
612	^67Cu	29	38	9.076086	2.226×10^5	2.58 d	β^−	IM
613	^44mSc	21	23	8.924627	2.110×10^5	2.44 d	IT, β^+
614	^128Ba	56	72	8.738523	2.100×10^5	2.43 d	β^+
615	^77Br	35	42	9.022431	2.053×10^5	2.38 d	β^+
616	^166Yb	70	96	8.442340	2.041×10^5	2.36 d	β^+
617	^177Ta	73	104	8.363553	2.036×10^5	2.36 d	β^+
618	^239Np	93	146	7.864999	2.036×10^5	2.36 d	β^−	DP
619	^153Tb	65	88	8.537471	2.022×10^5	2.34 d	β^+
620	^66Ni	28	38	9.071423	1.966×10^5	2.28 d	β^−
621	^247Pu	94	153	7.791975	1.961×10^5	2.27 d	β^−
622	^198m2Au	79	119		1.96×10^5	2.27 d	IT
623	^115Cd	48	67		1.92×10^5	2.23 d	β−
624	^149Pm	61	88	8.581871	1.911×10^5	2.21 d	β^−
625	^133mXe	54	79		1.89×10^5	2.20 d	IT
626	^203Pb	82	121	8.193431	1.869×10^5	2.16 d	β^+
627	^238Np	93	145	7.871931	1.829×10^5	2.12 d	β^−
628	^240Am	95	145	7.856694	1.829×10^5	2.12 d	β^+, α
629	^172Er	68	104	8.399752	1.775×10^5	2.05 d	β^−
630	^170Lu	71	99	8.408445	1.738×10^5	2.01 d	β^+
631	^72Zn	30	42	9.017591	1.674×10^5	1.94 d	β^−
632	^153Sm	62	91	8.545614	1.666×10^5	1.93 d	β^−	IM
633	^202Pt	78	124	8.183209	1.584×10^5	1.83 d	β^−
634	^48Sc	21	27	8.998327	1.572×10^5	1.82 d	β^−
635	^246Bk	97	149	7.811287	1.555×10^5	1.8 d	β^+, α
636	^195mHg	80	115	8.229399	1.498×10^5	1.73 d	IT, β^+
637	^188Ir	77	111	8.275200	1.494×10^5	1.73 d	β^+
638	^140La	57	83	8.673620	1.450×10^5	1.68 d	β^−
639	^254mEs	99	155		1.41×10^5	1.64 d	β−, IT, α, EC, SF
640	^69Ge	32	37	9.043800	1.406×10^5	1.63 d	β^+
641	^133mBa	56	77		1.4×10^5	1.62 d	IT,e
642	^77As	33	44	9.031283	1.398×10^5	1.62 d	β^−
643	^119Sb	51	68	8.823235	1.375×10^5	1.59 d	β^+
644	^147Gd	64	83	8.584001	1.370×10^5	1.59 d	β^+
645	^194Au	79	115	8.237626	1.369×10^5	1.58 d	β^+
646	^229Pa	91	138	7.940769	1.296×10^5	1.5 d	β^+, α
647	^246Cf	98	148	7.810792	1.285×10^5	1.49 d	α, β^+, SF
648	^57Ni	28	29	9.055222	1.282×10^5	1.48 d	β^+
649	^105Rh	45	60	8.907956	1.273×10^5	1.47 d	β^−	FP
650	^82Br	35	47	9.016407	1.270×10^5	1.47 d	β^−
651	^79Kr	36	43	9.013644	1.261×10^5	1.46 d	β^+
652	^137mCe	58	79	8.696327	1.238×10^5	1.43 d	IT, β^+
653	^169Lu	71	98	8.414978	1.226×10^5	1.42 d	β^+
654	^143Ce	58	85	8.642041	1.189×10^5	1.38 d	β^−
655	^251Es	99	152	7.774467	1.188×10^5	1.38 d	β^+, α
656	^83Sr	38	45	8.996568	1.167×10^5	1.35 d	β^+
657	^129Cs	55	74	8.749622	1.154×10^5	1.34 d	β^+
658	^268Db	105	163	7.635133	1.152×10^5	1.33 d	SF, EC, α[31]
659	^232Pa	91	141	7.916379	1.132×10^5	1.31 d	β^−, β^+
660	^193Os	76	117	8.244348	1.084×10^5	1.25 d	β^−
661	^165Tm	69	96	8.452758	1.082×10^5	1.25 d	β^+
662	^131mTe	52	79	8.720392	1.080×10^5	1.25 d	β^−, IT
663	^226Ac	89	137	7.963761	1.057×10^5	1.22 d	β^−, β^+, α
664	^160Er	68	92	8.484190	1.029×10^5	1.19 d	β^+
665	^151Pm	61	90	8.557387	1.022×10^5	1.18 d	β^−
666	^135mBa	56	79		1.01×10^5	1.17 d	IT
667	^121Sn	50	71		9.73×10^4	1.13 d	β−
668	^166Ho	67	99		9.65×10^4	1.12 d	β−	IM
669	^76As	33	43	9.022505	9.454×10^4	1.09 d	β^−
670	^200Tl	81	119	8.206567	9.396×10^4	1.09 d	β^+
671	^72As	33	39	9.018966	9.360×10^4	1.08 d	β^+
672	^231Th	90	141	7.924932	9.187×10^4	1.06 d	β^−, α	DP
673	^252Fm	100	152	7.766498	9.140×10^4	1.06 d	α, SF
674	^156mTb	65	91		8.78×10^4	1.02 d	IT
675	^189Re	75	114	8.272269	8.748×10^4	1.01 d	β^−

Radionuclides with half-lives of 1 hour to 1 day

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life (hours)	decay mode	notes
676	^197mHg	80	117		8.568×10^4	23.8	IT
677	^187W	74	113	8.284722	8.539×10^4	23.7	β^−
678	^248mBk	97	151		8.532×10^4	23.7	β^−, EC (30)
679	^173Hf	72	101	8.391617	8.496×10^4	23.6	β^+
680	^96Nb	41	55	8.963036	8.406×10^4	23.4	β^−
681	^154m2Tb	65	89	8.526912	8.172×10^4	22.7	β^+, IT (1.8)
682	^236mNp	93	143		8.1×10^4	22.5	EC, β^− (50)
683	^43K	19	24	8.922327	8.028×10^4	22.3	β^−
684	^182Os	76	106	8.316432	7.956×10^4	22.1	β^+
685	^228Pa	91	137	7.944468	7.920×10^4	22.0	β^+, α (2)
686	^48Cr	24	24	8.963390	7.762×10^4	21.6	β^+
687	^154Tb	65	89		7.74×10^4	21.5	β^+, β^− (<0.1)
688	^200Pb	82	118	8.202542	7.740×10^4	21.5	β^+
689	^112Pd	46	66	8.842185	7.571×10^4	21.0	β^−
690	^28Mg	12	16	8.607706	7.529×10^4	20.9	β^−	CG
691	^100Rh	45	55	8.927167	7.488×10^4	20.8	β^+
692	^133I	53	80	8.717094	7.488×10^4	20.8	β^−
693	^122Xe	54	68	8.770959	7.236×10^4	20.1	β^+
694	^255Fm	100	155	7.742704	7.225×10^4	20.1	α, SF (tr)
695	^95Tc	43	52		7.2×10^4	20.0	β^+
696	^181Re	75	106	8.328294	7.164×10^4	19.9	β^+
697	^197Pt	78	119	8.225756	7.161×10^4	19.9	β^−
698	^135La	57	78	8.713179	7.020×10^4	19.5	β^+
699	^194Ir	77	117		6.941×10^4	19.3	β^−
700	^142Pr	59	83	8.661417	6.883×10^4	19.1	β^−,EC (tr)
701	^200mAu	79	121	8.202877	6.732×10^4	18.7	β^−, IT (18)
702	^159Gd	64	95	8.502576	6.652×10^4	18.5	β^−
703	^135Ce	58	77	8.698179	6.372×10^4	17.7	β^+
704	^193Au	79	114	8.244353	6.354×10^4	17.7	β^+
705	^151Tb	65	86	8.545692	6.339×10^4	17.6	β^+, α (tr)
706	^55Co	27	28	9.053647	6.311×10^4	17.5	β^+
707	^152Tb	65	87	8.536591	6.300×10^4	17.5	β^+, α (tr)
708	^188Re	75	113	8.278860	6.121×10^4	17.0	β^−	IM
709	^125Xe	54	71	8.768864	6.084×10^4	16.9	β^+
710	^97Zr	40	57	8.926451	6.028×10^4	16.7	β^−
711	^186Ir	77	109	8.281935	5.990×10^4	16.6	β^+
712	^86Zr	40	46	8.975979	5.940×10^4	16.5	β^+
713	^76Br	35	41	8.996183	5.832×10^4	16.2	β^+
714	^119Te	52	67		5.778×10^4	16.1	EC, e+ (2.1)
715	^242Am	95	147		5.767×10^4	16.0	β^−, EC (17)
716	^170Hf	72	98	8.402210	5.764×10^4	16.0	β^+
717	^157Eu	63	94	8.513792	5.465×10^4	15.2	β^−
718	^24Na	11	13	8.422082	5.382×10^4	15.0	β^−	CG, IM
719	^76Kr	36	40	8.979406	5.328×10^4	14.8	β^+
720	^86Y	39	47	8.993234	5.306×10^4	14.7	β^+
721	^211Rn	86	125	8.112825	5.256×10^4	14.6	β^+, α (27)
722	^90Nb	41	49	8.989727	5.256×10^4	14.6	β^+
723	^185Ir	77	108	8.289382	5.184×10^4	14.4	β^+
724	^240U	92	148	7.851682	5.076×10^4	14.1	β^−	DP
725	^72Ga	31	41	9.023958	5.074×10^4	14.1	β^−
726	^69mZn	30	39	9.056536	4.954×10^4	13.8	IT, β^− (tr)
727	^109Pd	46	63	8.875061	4.932×10^4	13.7	β^−
728	^87mY	39	48		4.813×10^4	13.4	IT, β^+ (1.6)
729	^123I	53	70	8.786311	4.760×10^4	13.2	β^+	IM
730	^191mOs	76	115		4.716×10^4	13.1	IT
731	^183Os	76	107	8.309907	4.680×10^4	13.0	β^+
732	^150mEu	63	87		4.608×10^4	12.8	β^−, β^+(11)
733	^64Cu	29	35	9.093581	4.572×10^4	12.7	β^+, β^− (38)	IM
734	^182mRe	75	107		4.572×10^4	12.7	β^+
735	^200Pt	78	122	8.204342	4.500×10^4	12.5	β^−
736	^130I	53	77	8.740035	4.450×10^4	12.4	β^−
737	^42K	19	23	8.905175	4.436×10^4	12.3	β^−	IM
738	^171Hf	72	99	8.395480	4.356×10^4	12.1	β^+
739	^239Am	95	144	7.864666	4.284×10^4	11.9	β^+, α (0.01)
740	^193mHg	80	113	8.231483	4.248×10^4	11.8	β^+, IT (7.2)
741	^203Bi	83	120	8.177436	4.234×10^4	11.8	β^+
742	^77Ge	32	45	8.996185	4.068×10^4	11.3	β^−
743	^204Bi	83	121	8.172651	4.039×10^4	11.2	β^+
744	^189Pt	78	111	8.264359	3.913×10^4	10.9	β^+
745	^212Pb	82	130	8.106928	3.830×10^4	10.6	β^−	DP, IM
746	^195Hg	80	115		3.791×10^4	10.5	β^+
747	^175Ta	73	102	8.370813	3.780×10^4	10.5	β^+
748	^245Pu	94	151	7.813752	3.780×10^4	10.5	β^−
749	^187Ir	77	110	8.283713	3.780×10^4	10.5	β^+
750	^165Er	68	97	8.462406	3.730×10^4	10.4	β^+
751	^93Y	39	54	8.976951	3.665×10^4	10.2	β^−
752	^244Am	95	149	7.825914	3.636×10^4	10.1	β^−
753	^266Lr	103	163		3.600×10^4	10.0	SF
754	^154m1Tb	65	89		3.598×10^4	9.99	β^+, IT(22)
755	^183mOs	76	107		3.564×10^4	9.90	β^+, IT(15)
756	^155Dy	66	89	8.517521	3.564×10^4	9.90	β^+
757	^91Sr	38	53	8.990503	3.467×10^4	9.63	β^−
758	^196m2Au	79	117		3.456×10^4	9.60	IT
759	^66Ga	31	35	9.036843	3.416×10^4	9.49	β^+
760	^156Sm	62	94	8.516007	3.384×10^4	9.40	β^−
761	^127Te	52	75		3.366×10^4	9.35	β^−
762	^201Pb	82	119	8.196989	3.359×10^4	9.33	β^+
763	^152mEu	63	89		3.352×10^4	9.31	β^−, β^+(28)
764	^62Zn	30	32	9.057957	3.307×10^4	9.19	β^+
765	^135Xe	54	81	8.711453	3.290×10^4	9.14	β^−
766	^58mCo	27	31		3.276×10^4	9.10	IT
767	^128Sb	51	77	8.732343	3.244×10^4	9.01	β^−
768	^137Ce	58	79		3.24×10^4	9.00	β^+
769	^234Pu	94	140	7.898892	3.168×10^4	8.80	β^+, α (~6)
770	^184Ta	73	111	8.304154	3.132×10^4	8.70	β^−
771	^250Es	99	151	7.778407	3.096×10^4	8.60	β^+, α (<3)
772	^101Pd	46	55	8.917149	3.049×10^4	8.47	β^+
773	^52Fe	26	26	9.000789	2.979×10^4	8.28	β^+
774	^173Tm	69	104	8.396524	2.966×10^4	8.24	β^−
775	^180Ta	73	107		2.935×10^4	8.15	EC, β^− (14)
776	^157Dy	66	91	8.513544	2.930×10^4	8.14	β^+
777	^210At	85	125	8.128337	2.916×10^4	8.10	β^+, α (0.2)
778	^176Ta	73	103	8.363202	2.912×10^4	8.09	β^+
779	^166Tm	69	97	8.444183	2.772×10^4	7.70	β^+
780	^256mEs	99	157	7.730742	2.736×10^4	7.60	β^−
781	^171Er	68	103	8.408901	2.706×10^4	7.52	β^−
782	^199Tl	81	118	8.212333	2.671×10^4	7.42	β^+
783	^211At	85	126	8.126527	2.597×10^4	7.21	β^+, α (42)
784	^73Se	34	39	9.005821	2.574×10^4	7.15	β^+
785	^93mMo	42	51		2.466×10^4	6.85	IT, β^+ (0.1)
786	^234Pa	91	143	7.898930	2.412×10^4	6.70	β^−	DP
787	^135I	53	82	8.691994	2.365×10^4	6.57	β^−
788	^107Cd	48	59	8.884271	2.340×10^4	6.50	β^+
789	^82mRb	37	45	8.999608	2.330×10^4	6.47	β^+, IT (<0.3)
790	^153Dy	66	87	8.523288	2.304×10^4	6.40	β^+, α (tr)
791	^127Cs	55	72	8.750383	2.250×10^4	6.25	β^+
792	^228Ac	89	139	7.944591	2.214×10^4	6.15	β^−	DP
793	^99mTc	43	56		2.162×10^4	6.01	IT, β^− (tr)	IM
794	^145Pr	59	86	8.620514	2.154×10^4	5.98	β^−
795	^189mOs	76	113		2.092×10^4	5.81	IT
796	^207Po	84	123	8.154158	2.088×10^4	5.80	β^+, α (0.02)
797	^90Mo	42	48	8.962072	2.002×10^4	5.56	β^+
798	^257Md	101	156	7.725040	1.987×10^4	5.52	EC, α (15), SF (tr)
799	^111mPd	46	65	8.844589	1.980×10^4	5.50	IT, β^− (27)
800	^139mNd	60	79	8.659529	1.980×10^4	5.50	β^+, IT (12)
801	^180mHf	72	108		1.969×10^4	5.47	IT, β^− (0.3)
802	^209At	85	124	8.132954	1.948×10^4	5.41	β^+, α (4.1)
803	^113Ag	47	66	8.841531	1.933×10^4	5.37	β^−
804	^156m2Tb	65	91		1.908×10^4	5.30	IT (?), β^+ (?)
805	^198Tl	81	117	8.210166	1.908×10^4	5.30	β^+
806	^251Fm	100	151	7.768590	1.908×10^4	5.30	β^+, α (1.8)
807	^138Nd	60	78	8.665661	1.814×10^4	5.04	β^+
808	^160mHo	67	93	8.485877	1.807×10^4	5.02	IT, β^+ (27)
809	^118mSb	51	67	8.814963	1.800×10^4	5.00	β^+
810	^243Pu	94	149	7.833648	1.784×10^4	4.96	β^−
811	^192Au	79	113	8.242036	1.778×10^4	4.94	β^+
812	^110In	49	61	8.857464	1.764×10^4	4.90	β^+
813	^133mCe	58	75	8.690771	1.764×10^4	4.90	β^+
814	^94Tc	43	51	8.966583	1.758×10^4	4.88	β^+
815	^85mY	39	46	8.986880	1.750×10^4	4.86	β^+, IT (tr)
816	^73Ga	31	42	9.026112	1.750×10^4	4.86	β^−
817	^192Hg	80	112	8.238051	1.746×10^4	4.85	β^+
818	^132La	57	75	8.705721	1.728×10^4	4.80	β^+
819	^99mRh	45	54		1.692×10^4	4.70	β^+, IT (<0.16)
820	^267Db	105	162	7.644361	1.656×10^4	4.60	SF
821	^179Lu	71	108	8.345428	1.652×10^4	4.59	β^−
822	^81Rb	37	44	9.002871	1.645×10^4	4.57	β^+	IM
823	^243Bk	97	146	7.829801	1.620×10^4	4.50	β^+, α (~0.15)
824	^115mIn	49	66		1.615×10^4	4.49	IT, β^− (5.0)
825	^85mKr	36	49		1.613×10^4	4.48	β^−, IT (21)
826	^105Ru	44	61	8.889689	1.598×10^4	4.44	β^−
827	^80mBr	35	45	9.018872	1.591×10^4	4.42	IT
828	^139Pr	59	80	8.681565	1.588×10^4	4.41	β^+
829	^129Sb	51	78	8.727358	1.584×10^4	4.40	β^−
830	^244Bk	97	147	7.822491	1.566×10^4	4.35	β^+, α (tr)
831	^109In	49	60	8.864805	1.512×10^4	4.20	β^+
832	^184Hf	72	112	8.296871	1.483×10^4	4.12	β^−
833	^149Tb	65	84	8.551166	1.482×10^4	4.12	β^+, α (17)
834	^110Sn	50	60	8.851727	1.480×10^4	4.11	β^+
835	^44Sc	21	23		1.429×10^4	3.97	β^+
836	^71mZn	30	41	9.017370	1.426×10^4	3.96	β^−, IT (tr)
837	^141La	57	84	8.659540	1.411×10^4	3.92	β^−
838	^133La	57	76	8.714109	1.408×10^4	3.91	β^+
839	^43Sc	21	22	8.912907	1.401×10^4	3.89	β^+
840	^195mIr	77	118	8.233326	1.368×10^4	3.80	β^−, IT (5)
841	^193Hg	80	113		1.368×10^4	3.80	β^+
842	^176mLu	71	105		1.319×10^4	3.66	β^−, EC (0.1)
843	^262Lr	103	159	7.681556	1.296×10^4	3.60	SF, β^+, α
844	^202mPb	82	120		1.274×10^4	3.54	IT, β^+ (9.5)
845	^92Y	39	53	8.993208	1.274×10^4	3.54	β^−
846	^204Po	84	120	8.161200	1.271×10^4	3.53	β^+, α (0.7)
847	^132Ce	58	74	8.696131	1.264×10^4	3.51	β^+
848	^150Tb	65	85	8.545394	1.253×10^4	3.48	β^+, α (tr)
849	^117mCd	48	69	8.808840	1.210×10^4	3.36	β^−
850	^61Cu	29	32	9.087452	1.200×10^4	3.33	β^+
851	^209Pb	82	127	8.155607	1.171×10^4	3.25	β^−	DP
852	^254Fm	100	154	7.752808	1.166×10^4	3.24	α, SF (0.06)
853	^250Bk	97	153	7.779523	1.156×10^4	3.21	β^−
854	^161Er	68	93	8.476352	1.156×10^4	3.21	β^+
855	^190mRe	75	115	8.257433	1.152×10^4	3.20	β^− (54), IT
856	^90mY	39	51		1.148×10^4	3.19	IT, β^− (tr)
857	^191Au	79	112	8.248343	1.145×10^4	3.18	β^+
858	^173Ta	73	100	8.374218	1.130×10^4	3.14	β^+
859	^112Ag	47	65	8.844756	1.127×10^4	3.13	β^−
860	^247Cf	98	149	7.803566	1.120×10^4	3.11	β^+, α (0.04)
861	^184Ir	77	107	8.286599	1.112×10^4	3.09	β^+
862	^190m3Ir	77	113		1.111×10^4	3.09	β^+, IT (8.6)
863	^45Ti	22	23	8.938121	1.109×10^4	3.08	β^+
864	^167Ho	67	100	8.444304	1.081×10^4	3.00	β^−
865	^264Lr	103	161		1.081×10^4	3.00	SF[31]
866	^134Sm	62	72		1.048×10^4	2.91	IT
867	^239Cm	96	143	7.857143	1.044×10^4	2.90	β^+, α (tr)
868	^197Tl	81	116	8.215190	1.022×10^4	2.84	β^+
869	^88Kr	36	52	8.976918	1.022×10^4	2.84	β^−
870	^38S	16	22	8.778196	1.022×10^4	2.84	β^−
871	^87mSr	38	49		1.013×10^4	2.82	IT, EC (0.3)
872	^117Sb	51	66	8.828977	1.008×10^4	2.80	β^+
873	^224Ac	89	135	7.980993	1.001×10^4	2.78	β^+, α (9.4), β^−(<1.6)
874	^93Tc	43	50	8.970274	9.900×10^3	2.75	β^+
875	^85Y	39	46		9.648×10^3	2.68	β^+
876	^150Pm	61	89	8.562014	9.648×10^3	2.68	β^−
877	^92Sr	38	54	8.972067	9.576×10^3	2.66	β^−
878	^256Fm	100	156	7.737398	9.456×10^3	2.63	SF, α (8.1)
879	^31Si	14	17	8.811618	9.438×10^3	2.62	β^−	CG
880	^56Mn	25	31	9.087572	9.284×10^3	2.58	β^−
881	^65Ni	28	37	9.073267	9.062×10^3	2.52	β^−
882	^195Ir	77	118		9×10^3	2.50	β^−
883	^176W	74	102	8.359055	9.000×10^3	2.50	β^+
884	^117Cd	48	69		8.964×10^3	2.49	β^−
885	^116Te	52	64	8.806414	8.964×10^3	2.49	β^+
886	^141Nd	60	81	8.668476	8.964×10^3	2.49	β^+
887	^161Ho	67	94	8.488737	8.928×10^3	2.48	β^+
888	^210Rn	86	124	8.117032	8.640×10^3	2.40	α (96), β^+
889	^198Pb	82	116	8.202893	8.640×10^3	2.40	β^+
890	^238Cm	96	142	7.863764	8.640×10^3	2.40	β^+, α
891	^83Br	35	48	9.023243	8.640×10^3	2.40	β^−
892	^152Dy	66	86	8.532670	8.568×10^3	2.38	β^+, α (0.1)	IM
893	^178mTa	73	105	8.355075	8.496×10^3	2.36	β^+
894	^187Pt	78	109	8.267638	8.460×10^3	2.35	β^+
895	^165Dy	66	99	8.456891	8.402×10^3	2.33	β^−
896	^132I	53	79	8.720570	8.262×10^3	2.30	β^−
897	^158Er	68	90	8.484619	8.244×10^3	2.29	β^+
898	^66Ge	32	34	9.004964	8.136×10^3	2.26	β^+
899	^129Ba	56	73	8.730746	8.028×10^3	2.23	β^+
900	^150Sm	62	88		7.992×10^3	2.22	β^+, α (tr?)
901	^177W	74	103	8.352118	7.920×10^3	2.20	β^+
902	^106mRh	45	61	8.884761	7.860×10^3	2.18	β^−
903	^129mBa	56	73		7.776×10^3	2.16	β^+, IT (tr?)
904	^138mPr	59	79	8.671088	7.632×10^3	2.12	β^+
905	^121I	53	68	8.784443	7.632×10^3	2.12	β^+
906	^127Sn	50	77	8.728800	7.560×10^3	2.10	β^−
907	^123Xe	54	69	8.764409	7.488×10^3	2.08	β^+
908	^186Pt	78	108	8.274897	7.488×10^3	2.08	β^+, α (tr)
909	^245Am	95	150	7.818674	7.380×10^3	2.05	β^−
910	^89Nb	41	48	8.977507	7.308×10^3	2.03	β^+
911	^195mOs	76	119		7.2×10^3	2.00	β^−, IT (?)
912	^117mIn	49	68	8.828849	6.972×10^3	1.94	β^−, IT (47)
913	^186mIr	77	109		6.912×10^3	1.92	β^+, IT (~25)
914	^177Yb	70	107	8.359401	6.880×10^3	1.91	β^−
915	^198mTl	81	117		6.732×10^3	1.87	β^+, IT (44)
916	^196Tl	81	115	8.211618	6.624×10^3	1.84	β^+
917	^83m2Kr	36	47		6.588×10^3	1.83	IT
918	^18F	9	9	8.022789	6.585×10^3	1.83	β^+	CG,IM
919	^41Ar	18	23	8.877852	6.577×10^3	1.83	β^−	CG
920	^163Tm	69	94	8.456205	6.516×10^3	1.81	β^+
921	^239Pa	91	148	7.848148	6.480×10^3	1.80	β^−
922	^201Bi	83	118	8.177875	6.480×10^3	1.80	β^+, α
923	^207At	85	122	8.135303	6.480×10^3	1.80	β^+, α (~10)
924	^224Rn	86	138	7.971327	6.420×10^3	1.78	β^−
925	^80Sr	38	42	8.950177	6.378×10^3	1.77	β^+
926	^181Os	76	105	8.311935	6.300×10^3	1.75	β^+
927	^205Po	84	121	8.156737	6.264×10^3	1.74	β^+, α (0.04)
928	^149Nd	60	89	8.570529	6.221×10^3	1.73	β^−
929	^202Bi	83	119	8.173966	6.192×10^3	1.72	β^+, α (tr)
930	^249Es	99	150	7.785464	6.132×10^3	1.70	β^+~, α (0.6)
931	^147Tb	65	82	8.552634	6.120×10^3	1.70	β^+
932	^87Zr	40	47	8.983373	6.048×10^3	1.68	β^+
933	^126Ba	56	70	8.727439	6.000×10^3	1.67	β^+
934	^113mIn	49	64		5.968×10^3	1.66	IT
935	^61Co	27	34	9.102449	5.940×10^3	1.65	β^−
936	^95Ru	44	51	8.949749	5.915×10^3	1.64	β^+
937	^238Am	95	143	7.867882	5.880×10^3	1.63	β^+,α (tr)
938	^208At	85	123	8.131376	5.868×10^3	1.63	β^+, α (0.6)
939	^133Ce	58	75		5.82×10^3	1.62	β^+
940	^75Br	35	40	8.993181	5.802×10^3	1.61	β^+
941	^152m5Eu	63	89		5.76×10^3	1.60	IT
942	^259Md	101	158	7.709860	5.760×10^3	1.60	SF, α (<1.3)
943	^197mPt	78	119		5.725×10^3	1.59	IT, β^− (3.3)
944	^230Ra	88	142	7.921249	5.580×10^3	1.55	β^−
945	^142La	57	85	8.634954	5.466×10^3	1.52	β^−
946	^78As	33	45	9.004879	5.442×10^3	1.51	β^−
947	^199Pb	82	117	8.198111	5.400×10^3	1.50	β^+
948	^78Ge	32	46	8.992635	5.280×10^3	1.47	β^−
949	^255Cf	98	157	7.738739	5.100×10^3	1.42	β^−
950	^196mTl	81	115		5.076×10^3	1.41	β^+, IT (3.8)
951	^196mIr	77	119	8.219440	5.040×10^3	1.40	β^−, IT (<0.3)
952	^132mI	53	79		4.993×10^3	1.39	IT, β^− (14)
953	^139Ba	56	83	8.682217	4.984×10^3	1.38	β^−
954	^75Ge	32	43	9.029413	4.967×10^3	1.38	β^−
955	^120I	53	67	8.769577	4.896×10^3	1.36	β^+
956	^266Db	105	161		4.8×10^3	1.33	α ?, SF ?, β^+ ?
957	^256Md	101	155	7.729062	4.620×10^3	1.28	β^+, α (9.2), SF (<3)
958	^137Pr	59	78	8.678459	4.608×10^3	1.28	β^+
959	^87Kr	36	51	8.999022	4.578×10^3	1.27	β^−
960	^164Yb	70	94	8.443419	4.548×10^3	1.26	β^+
961	^163Er	68	95	8.471168	4.500×10^3	1.25	β^+
962	^77Kr	36	41	8.982618	4.464×10^3	1.24	β^+
963	^178Yb	70	108	8.350530	4.440×10^3	1.23	β^−
964	^237Am	95	142	7.874830	4.380×10^3	1.22	β^+,α (0.03)
965	^142Sm	62	80	8.627616	4.349×10^3	1.21	β^+
966	^97Nb	41	56	8.953864	4.326×10^3	1.20	β^−
967	^185Pt	78	107	8.269598	4.254×10^3	1.18	β^+
968	^195Tl	81	114	8.215712	4.176×10^3	1.16	β^+
969	^129Te	52	77		4.176×10^3	1.16	β^−
970	^104Ag	47	57	8.889702	4.152×10^3	1.15	β^+
971	^110mIn	49	61		4.146×10^3	1.15	β^+
972	^174Ta	73	101	8.368684	4.104×10^3	1.14	β^+
973	^68Ga	31	37	9.057888	4.063×10^3	1.13	β^+	IM
974	^85mSr	38	47		4.058×10^3	1.13	IT, β^+ (13)
975	^190mIr	77	113		4.032×10^3	1.12	IT
976	^162mHo	67	95	8.478371	4.020×10^3	1.12	IT, β^+ (38)
977	^204m2Pb	82	122		4.016×10^3	1.12	IT
978	^89mNb	41	48		3.96×10^3	1.10	β^+
979	^103Ag	47	56	8.894541	3.942×10^3	1.10	β^+
980	^249Cm	96	153	7.787191	3.849×10^3	1.07	β^−
981	^183Hf	72	111	8.307885	3.841×10^3	1.07	β^−
982	^229Ac	89	140	7.937048	3.762×10^3	1.05	β^−
983	^117Te	52	65	8.798652	3.720×10^3	1.03	β^+
984	^240Np	93	147	7.853348	3.714×10^3	1.03	β^−	DP
985	^182mHf	72	110		3.69×10^3	1.03	β^−, IT (46)
986	^212Bi	83	129	8.109617	3.633×10^3	1.01	β^−,α (36)	DP
987	^116mSb	51	65	8.816483	3.618×10^3	1.01	β^+
988	^148Tb	65	83	8.547949	3.600×10^3	1.00	β^+
989	^270Db	105	165		3.600×10^3	1.00	α, SF, ε?

Radionuclides with half-lives of 1 minute to 1 hour

Main article: List of radioactive nuclides by half-life § 100 seconds

Radionuclides with half-lives of 1 second to 1 minute

Main article: List of radioactive nuclides by half-life § 100 seconds

Radionuclides with half-lives less than 1 second

Main article: List of radioactive nuclides by half-life § 10−3 seconds (milliseconds)

See also

• Isotope geochemistry
• List of elements by stability of isotopes
• List of radioactive nuclides by half-life
• Monoisotopic element
• Mononuclidic element
• Primordial nuclide
• Radionuclide
• Stable nuclide
• Table of nuclides

Sources

Almost all data are taken from reference.^[32] For more recent updates, see reference.^[33] These sources do not indicate whether certain heavy isotopes starting from Lr, Rf, Db, ... (etc.) were produced, observed, or only predicted from estimated data.

Notes

1. Two further nuclides, plutonium-244 and samarium-146, have half-lives just long enough (8.0×10⁷ and 9.20×10⁷ years^[2]) that they could have survived from the formation of the Solar System and be present on Earth in trace quantities (having survived 57 and 50 half-lives). They have previously been considered primordial, but recent studies failed to find any evidence of them on Earth.^{[citation needed]}

References

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External links

• National Nuclear Data Center, Brookhaven National Laboratory
  • The 2016 Atomic Mass Evaluation, AMDC
• Karlsruhe Nuclide Chart, 9th edition, 2015, Joseph Magill, Gerda Pfennig, Raymond Dreher, Zsolt Sóti
• National Isotope Development Center Reference information on isotopes, and coordination and management of isotope production, availability, and distribution
• Isotope Development & Production for Research and Applications (IDPRA) U.S. Department of Energy program for isotope production and production research and development
  • Accelerator Systems and Stable Isotopes Group at ORNL
• Atomic Weights and Isotopic Compositions for All Elements U.S. National Institute of Standards and Technology
• Table of nuclides (compact, with energy per baryon) Overview picture for energy of nuclides