スズ（Sn）には10種類もの安定な同位体が存在する。これは、50が陽子の魔法数であるからだと考えられる。28種類の不安定同位体も知られ、中には1994年に見つかった、二重魔法数の100Snもある[1]。
標準原子量は118.710(7) uである。
一覧
| 同位体核種
|
Z(p)
|
N(n)
|
同位体質量 (u)
|
半減期
|
核スピン数
|
天然存在比
|
天然存在比
(範囲)
|
| 励起エネルギー
|
| 99Sn
|
50
|
49
|
98.94933(64)#
|
5# ms
|
9/2+#
|
|
|
| 100Sn
|
50
|
50
|
99.93904(76)
|
1.1(4) s [0.94(+54-27) s]
|
0+
|
|
|
| 101Sn
|
50
|
51
|
100.93606(32)#
|
3(1) s
|
5/2+#
|
|
|
| 102Sn
|
50
|
52
|
101.93030(14)
|
4.5(7) s
|
0+
|
|
|
| 102mSn
|
2017(2) keV
|
720(220) ns
|
(6+)
|
|
|
| 103Sn
|
50
|
53
|
102.92810(32)#
|
7.0(6) s
|
5/2+#
|
|
|
| 104Sn
|
50
|
54
|
103.92314(11)
|
20.8(5) s
|
0+
|
|
|
| 105Sn
|
50
|
55
|
104.92135(9)
|
34(1) s
|
(5/2+)
|
|
|
| 106Sn
|
50
|
56
|
105.91688(5)
|
115(5) s
|
0+
|
|
|
| 107Sn
|
50
|
57
|
106.91564(9)
|
2.90(5) min
|
(5/2+)
|
|
|
| 108Sn
|
50
|
58
|
107.911925(21)
|
10.30(8) min
|
0+
|
|
|
| 109Sn
|
50
|
59
|
108.911283(11)
|
18.0(2) min
|
5/2(+)
|
|
|
| 110Sn
|
50
|
60
|
109.907843(15)
|
4.11(10) h
|
0+
|
|
|
| 111Sn
|
50
|
61
|
110.907734(7)
|
35.3(6) min
|
7/2+
|
|
|
| 111mSn
|
254.72(8) keV
|
12.5(10) µs
|
1/2+
|
|
|
| 112Sn
|
50
|
62
|
111.904818(5)
|
STABLE
|
0+
|
0.0097(1)
|
|
| 113Sn
|
50
|
63
|
112.905171(4)
|
115.09(3) d
|
1/2+
|
|
|
| 113mSn
|
77.386(19) keV
|
21.4(4) min
|
7/2+
|
|
|
| 114Sn
|
50
|
64
|
113.902779(3)
|
STABLE
|
0+
|
0.0066(1)
|
|
| 114mSn
|
3087.37(7) keV
|
733(14) ns
|
7-
|
|
|
| 115Sn
|
50
|
65
|
114.903342(3)
|
STABLE
|
1/2+
|
0.0034(1)
|
|
| 115m1Sn
|
612.81(4) keV
|
3.26(8) µs
|
7/2+
|
|
|
| 115m2Sn
|
713.64(12) keV
|
159(1) µs
|
11/2-
|
|
|
| 116Sn
|
50
|
66
|
115.901741(3)
|
STABLE
|
0+
|
0.1454(9)
|
|
| 117Sn
|
50
|
67
|
116.902952(3)
|
STABLE
|
1/2+
|
0.0768(7)
|
|
| 117m1Sn
|
314.58(4) keV
|
13.76(4) d
|
11/2-
|
|
|
| 117m2Sn
|
2406.4(4) keV
|
1.75(7) µs
|
(19/2+)
|
|
|
| 118Sn
|
50
|
68
|
117.901603(3)
|
STABLE
|
0+
|
0.2422(9)
|
|
| 119Sn
|
50
|
69
|
118.903308(3)
|
STABLE
|
1/2+
|
0.0859(4)
|
|
| 119m1Sn
|
89.531(13) keV
|
293.1(7) d
|
11/2-
|
|
|
| 119m2Sn
|
2127.0(10) keV
|
9.6(12) µs
|
(19/2+)
|
|
|
| 120Sn
|
50
|
70
|
119.9021947(27)
|
STABLE
|
0+
|
0.3258(9)
|
|
| 120m1Sn
|
2481.63(6) keV
|
11.8(5) µs
|
(7-)
|
|
|
| 120m2Sn
|
2902.22(22) keV
|
6.26(11) µs
|
(10+)#
|
|
|
| 121Sn
|
50
|
71
|
120.9042355(27)
|
27.03(4) h
|
3/2+
|
|
|
| 121m1Sn
|
6.30(6) keV
|
43.9(5) a
|
11/2-
|
|
|
| 121m2Sn
|
1998.8(9) keV
|
5.3(5) µs
|
(19/2+)#
|
|
|
| 121m3Sn
|
2834.6(18) keV
|
0.167(25) µs
|
(27/2-)
|
|
|
| 122Sn
|
50
|
72
|
121.9034390(29)
|
STABLE
|
0+
|
0.0463(3)
|
|
| 123Sn
|
50
|
73
|
122.9057208(29)
|
129.2(4) d
|
11/2-
|
|
|
| 123m1Sn
|
24.6(4) keV
|
40.06(1) min
|
3/2+
|
|
|
| 123m2Sn
|
1945.0(10) keV
|
7.4(26) µs
|
(19/2+)
|
|
|
| 123m3Sn
|
2153.0(12) keV
|
6 µs
|
(23/2+)
|
|
|
| 123m4Sn
|
2713.0(14) keV
|
34 µs
|
(27/2-)
|
|
|
| 124Sn
|
50
|
74
|
123.9052739(15)
|
STABLE [>100E+15 a]
|
0+
|
0.0579(5)
|
|
| 124m1Sn
|
2204.622(23) keV
|
0.27(6) µs
|
5-
|
|
|
| 124m2Sn
|
2325.01(4) keV
|
3.1(5) µs
|
7-
|
|
|
| 124m3Sn
|
2656.6(5) keV
|
45(5) µs
|
(10+)#
|
|
|
| 125Sn
|
50
|
75
|
124.9077841(16)
|
9.64(3) d
|
11/2-
|
|
|
| 125mSn
|
27.50(14) keV
|
9.52(5) min
|
3/2+
|
|
|
| 126Sn
|
50
|
76
|
125.907653(11)
|
2.30(14)E+5 a
|
0+
|
trace
|
|
| 126m1Sn
|
2218.99(8) keV
|
6.6(14) µs
|
7-
|
|
|
| 126m2Sn
|
2564.5(5) keV
|
7.7(5) µs
|
(10+)#
|
|
|
| 127Sn
|
50
|
77
|
126.910360(26)
|
2.10(4) h
|
(11/2-)
|
|
|
| 127mSn
|
4.7(3) keV
|
4.13(3) min
|
(3/2+)
|
|
|
| 128Sn
|
50
|
78
|
127.910537(29)
|
59.07(14) min
|
0+
|
|
|
| 128mSn
|
2091.50(11) keV
|
6.5(5) s
|
(7-)
|
|
|
| 129Sn
|
50
|
79
|
128.91348(3)
|
2.23(4) min
|
(3/2+)#
|
|
|
| 129mSn
|
35.2(3) keV
|
6.9(1) min
|
(11/2-)#
|
|
|
| 130Sn
|
50
|
80
|
129.913967(11)
|
3.72(7) min
|
0+
|
|
|
| 130m1Sn
|
1946.88(10) keV
|
1.7(1) min
|
(7-)#
|
|
|
| 130m2Sn
|
2434.79(12) keV
|
1.61(15) µs
|
(10+)
|
|
|
| 131Sn
|
50
|
81
|
130.917000(23)
|
56.0(5) s
|
(3/2+)
|
|
|
| 131m1Sn
|
80(30)# keV
|
58.4(5) s
|
(11/2-)
|
|
|
| 131m2Sn
|
4846.7(9) keV
|
300(20) ns
|
(19/2- to 23/2-)
|
|
|
| 132Sn
|
50
|
82
|
131.917816(15)
|
39.7(8) s
|
0+
|
|
|
| 133Sn
|
50
|
83
|
132.92383(4)
|
1.45(3) s
|
(7/2-)#
|
|
|
| 134Sn
|
50
|
84
|
133.92829(11)
|
1.050(11) s
|
0+
|
|
|
| 135Sn
|
50
|
85
|
134.93473(43)#
|
530(20) ms
|
(7/2-)
|
|
|
| 136Sn
|
50
|
86
|
135.93934(54)#
|
0.25(3) s
|
0+
|
|
|
| 137Sn
|
50
|
87
|
136.94599(64)#
|
190(60) ms
|
5/2-#
|
|
|
出典
- ^ Phil Walker (1994). “Doubly Magic Discovery of Tin-100”. PHYSICS WORLD 7 (June). http://physicsworldarchive.iop.org/index.cfm?action=summary&doc=7%2F6%2Fphwv7i6a24%40pwa-xml&qt=.
参考文献
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
