Isotopes of Curium (Z=96)

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Isotope Half-life Spin Parity Decay Mode(s) or Abundance
233Cm
234Cm 0+
235Cm
236Cm 0+ %EC=?, %A=?
237Cm
238Cm 2.4 h 0+ %EC=96.16 18, %A=3.84 18
239Cm 2.9 h(7/2-) %EC= 100, %A < 0.1
240Cm 27 d 0+ %A > 99.5 , %EC < 0.5 , %SF=3.9E-6 8
241Cm 32.8 d 1/2+ %EC=99.0 1, %A=1.0 1
241m1Cm 15.3 ns
242Cm 162.8 d 0+ %A=100, %SF=6.37E-6 18
242m1Cm 40 ps
242m2Cm 0.18 us
243Cm 29.1 y5/2+ %A=99.71 3, %EC=0.29 3 , %SF=5.3E-9 9
243m1Cm 42 ns
244Cm 18.10 y 0+ %A=100, %SF=1.371E-4 21
244m1Cm 34 ms 6+ %IT=100, %SF < 7.7E-10
245Cm 8500 y 7/2+ %A=100, %SF=6.1E-7 9
245m1Cm 13.2 ns
246Cm 4730 y 0+ %A=99.9737 3, %SF=0.0263 3
247Cm 1.56e+7 y 9/2- %A=100
248Cm 3.40e+5 y 0+ %A=91.61 16, %SF=8.39 16
249Cm 64.15 m 1/2(+) %B-=100
250Cm 9000 y 0+ %SF ~ 86, %A ~ 8, %B- ~ 6
251Cm 16.8 m (1/2+) %B-=100
252Cm 2 d 0+ %B-=100
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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