Isotopes of Samarium (Z=62)

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Isotope Half-life Spin Parity Decay Mode(s) or Abundance
130Sm 0+
131Sm 1.2 s %EC+%B+=100, %ECP=?
132Sm 4.0 s 0+ %EC+%B+=100 , %ECP=?
133Sm 3.7 s (5/2+) %EC+%B+=100, %ECP=?
134Sm 10 s 0+ %EC+%B+=100
135Sm 10.3 s (7/2+) %EC+%B+=100, %ECP=0.02 1
136Sm 47 s0+ %EC+%B+=100
137Sm 45 s(9/2-) %EC+%B+=100
138Sm 3.1 m0+ %EC+%B+=100
139Sm 2.57 m(1/2)+ %EC+%B+=100
139m1Sm 10.7 s(11/2)- %IT=93.7 5, %EC+%B+=6.3 5
140Sm 14.82 m0+ %EC+%B+=100
141Sm 10.2 m1/2+ %EC+%B+=100
141m1Sm 22.6 m11/2- %EC+%B+=99.69 3, %IT=0.31 3
142Sm 72.49 m0+ %EC+%B+=100
143Sm 8.83 m3/2+ %EC+%B+=100
143m1Sm 66 s11/2- %IT=99.76 6, %EC+%B+=0.24 6
143m2Sm 30 ms23/2(-) %IT=100
144Sm stable0+ %Abundance=3.1 1
145Sm 340 d7/2- %EC=100
146Sm 1.03e8 y0+ %A=100
147Sm 1.06e+11 y7/2- %Abundance=15.0 2, %A=100
148Sm 7e+15 y0+ %Abundance=11.3 1, %A=100
149Sm 2e+15 y 7/2- %Abundance=13.8 1
150Sm stable0+ %Abundance=7.4 1
151Sm 90 y 5/2- %B-=100
152Sm stable 0+ %Abundance=26.7 2
153Sm 46.284 h3/2+ %B-=100
153m1Sm 10.6 ms11/2- %IT=100
154Sm stable 0+ %Abundance=22.7 2
155Sm 22.3 m3/2- %B-=100
156Sm 9.4 h 0+ %B-=100
157Sm 482 s (3/2-) %B-=100
158Sm 5.30 m 0+ %B-=100
159Sm 11.37 s (5/2-) %B-=100
160Sm 9.6 s 0+ %B-=100
161Sm
162Sm 0+
163Sm
164Sm 0+
165Sm
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
Isotopes Project Home Page
 Lawrence Berkeley National Laboratory
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