Isotopen van dysprosium

Het chemisch element dysprosium (Dy), met een atoommassa van 162,500(1) u, bezit 7 stabiele isotopen: 156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy en 164Dy, waarvan de laatste het meest abundant is (ongeveer 28,18%). De 28 radio-isotopen zijn onstabiel en hebben een relatief korte halfwaardetijd (de meeste minder dan een seconde). 163Dy en 164Dy kunnen theoretisch gezien spontane splijting ondergaan. De overige stabiele isotopen worden ervan verdacht via α-verval te vervallen tot isotopen van gadolinium, maar dit verval is nog nooit waargenomen. Bovendien is de halfwaardetijd van dit verval steeds miljoenen tot miljarden malen groter dan de leeftijd van het universum.

De kortstlevende isotoop van dysprosium is 138Dy, met een halfwaardetijd van ongeveer 200 milliseconden. De langstlevende is 154Dy, met een halfwaardetijd van 3 miljoen jaar.

Overzicht

Nuclide Z (p) N (n) Isotopische massa (u) Halveringstijd Radioactief verval VP Kernspin Isotopische verhouding
(molfractie)
Natuurlijk voorkomen
(molfractie)
Excitatie-energie
138Dy 66 72 137,96249(64) 200 ms 0+
139Dy 66 73 138,95954(54) 600(200) ms 7/2+
140Dy 66 74 139,95401(54) 700 ms β+ 140Tb 0+
140mDy 2166,1(5) keV 7,0(5) µs (8)
141Dy 66 75 140,95135(32) 0,9(2) s β+ 141Tb (9/2)
β+, p (zelden) 140Gd
142Dy 66 76 141,94637(39) 2,3(3) s β+ (99,94%) 142Tb 0+
β+, p (0,06%) 141Gd
143Dy 66 77 142,94383(21) 5,6(10) s β+ 143Tb (1/2+)
β+, p (zelden) 142Gd
143mDy 310,7(6) keV 3,0(3) s (11/2)
144Dy 66 78 143,93925(3) 9,1(4) s β+ 144Tb 0+
β+, p (zelden) 143Gd
145Dy 66 79 144,93743(5) 9,5(10) s β+ 145Tb (1/2+)
β+, p (zelden) 144Gd
145mDy 118,2(2) keV 14,1(7) s β+ 145Tb (11/2)
146Dy 66 80 145,932845(29) 33,2(7) s β+ 146Tb 0+
146mDy 2935,7(6) keV 150(20) ms IT 146Dy (10+)
147Dy 66 81 146,931092(21) 40(10) s β+ (99,95%) 147Tb 1/2+
β+, p (0,05%) 146Tb
147m1Dy 750,5(4) keV 55(1) s β+ (65%) 147Tb 11/2
IT (35%) 147Dy
147m2Dy 3407,2(8) keV 0,40(1) µs (27/2)
148Dy 66 82 147,927150(11) 3,3(2) min β+ 148Tb 0+
149Dy 66 83 148,927305(9) 4,20(14) min β+ 149Tb 7/2
149mDy 2661,1(4) keV 490(15) ms IT (99,3%) 149Dy (27/2)
β+ (0,7%) 149Tb
150Dy 66 84 149,925585(5) 7,17(5) min β+ (64%) 150Tb 0+
α (36%) 146Gd
151Dy 66 85 150,926185(4) 17,9(3) min β+ (94,4%) 151Tb 7/2
α (5,6%) 147Gd
152Dy 66 86 151,924718(6) 2,38(2) uur EV (99,9%) 152Tb 0+
α (0,1%) 148Gd
153Dy 66 87 152,925765(5) 6,4(1) uur β+ (99,99%) 153Tb 7/2
α (0,00939%) 149Gd
154Dy 66 88 153,924424(8) 3,0(15) × 106 jaar α 150Gd 0+
β+β+ (rare) 154Gd
155Dy 66 89 154,925754(13) 9,9(2) uur β+ 155Tb 3/2
155mDy 234,33(3) keV 6(1) µs 11/2
156Dy 66 90 155,924283(7) stabiel 0+ 5,6(3) × 10−4
157Dy 66 91 156,925466(7) 8,14(4) uur β+ 157Tb 3/2
157m1Dy 161,99(3) keV 1,3(2) µs 9/2+
157m2Dy 199,38(7) keV 21,6(16) ms IT 157Dy 11/2
158Dy 66 92 157,924409(4) stabiel 0+ 9,5(3) × 10−4
159Dy 66 93 158,9257392(29) 144,4(2) dagen EV 159Tb 3/2
159mDy 352,77(14) keV 122(3) µs 11/2
160Dy 66 94 159,9251975(27) stabiel 0+ 0,02329(18)
161Dy 66 95 160,9269334(27) stabiel 5/2+ 0,18889(42)
162Dy 66 96 161,9267984(27) stabiel 0+ 0,25475(36)
163Dy 66 97 162,9287312(27) stabiel 5/2 0,24896(42)
164Dy 66 98 163,9291748(27) stabiel 0+ 0,28260(54)
165Dy 66 99 164,9317033(27) 2,334(1) uur β 165Ho 7/2+
165mDy 108,160(3) keV 1,257(6) min IT (97,76%) 165Dy 1/2
β (2,24%) 165Ho
166Dy 66 100 165,9328067(28) 81,6(1) uur β 166Ho 0+
167Dy 66 101 166,93566(6) 6,20(8) min β 167Ho (1/2)
168Dy 66 102 167,93713(15) 8,7(3) min β 168Ho 0+
169Dy 66 103 168,94031(32) 39(8) s β 169Ho (5/2)
170Dy 66 104 169,94239(21) 30 s β 170Ho 0+
171Dy 66 105 170,94620(32) 6 s β 171Ho 7/2
172Dy 66 106 171,94876(43) 3 s β 172Ho 0+
173Dy 66 107 172,95300(54) 2 s β 173Ho 9/2+

Overzicht van isotopen per element

1 18
1 H 2 Periodiek systeem 13 14 15 16 17 He
2 Li Be De links verwijzen naar isotopen per element B C N O F Ne
3 Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S Cl Ar
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
6 Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
7 Fr Ra ↓↓ Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
Lanthaniden La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actiniden Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

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