Isotopes of Dysprosium - Table

Table

nuclide
symbol		 Z(p) N(n)
isotopic mass (u)
 half-life decay
mode(s)		 daughter
isotope(s)		 nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
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 (rare) 140Gd
142Dy 66 76 141.94637(39)# 2.3(3) s β+ (99.94%) 142Tb 0+
β+, p (.06%) 141Gd
143Dy 66 77 142.94383(21)# 5.6(10) s β+ 143Tb (1/2+)
β+, p (rare) 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 (rare) 143Gd
145Dy 66 79 144.93743(5) 9.5(10) s β+ 145Tb (1/2+)
β+, p (rare) 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 (.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+ (.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) h EC (99.9%) 152Tb 0+
α (.1%) 148Gd
153Dy 66 87 152.925765(5) 6.4(1) h β+ (99.99%) 153Tb 7/2(-)
α (.00939%) 149Gd
154Dy 66 88 153.924424(8) 3.0(15)×106 a α 150Gd 0+
β+β+ (rare) 154Gd
155Dy 66 89 154.925754(13) 9.9(2) h β+ 155Tb 3/2-
155mDy 234.33(3) keV 6(1) µs 11/2-
156Dy 66 90 155.924283(7) Observationally Stable 0+ 5.6(3)×10−4
157Dy 66 91 156.925466(7) 8.14(4) h 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) Observationally Stable 0+ 9.5(3)×10−4
159Dy 66 93 158.9257392(29) 144.4(2) d EC 159Tb 3/2-
159mDy 352.77(14) keV 122(3) µs 11/2-
160Dy 66 94 159.9251975(27) Observationally Stable 0+ 0.02329(18)
161Dy 66 95 160.9269334(27) Observationally Stable 5/2+ 0.18889(42)
162Dy 66 96 161.9267984(27) Observationally Stable 0+ 0.25475(36)
163Dy 66 97 162.9287312(27) Stable 5/2- 0.24896(42)
164Dy 66 98 163.9291748(27) Stable 0+ 0.28260(54)
165Dy 66 99 164.9317033(27) 2.334(1) h 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) h 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+#

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