Isotopes of Americium (Z=95)

Click on an isotope to get more information about its decay
Isotope Half-life Spin Parity Decay Mode(s) or Abundance
231Am
232Am 79 s %EC ~ 98, %A ~ 2, %ECSF=0.069 10
233Am
234Am 2.32 m %EC=99.961 12, %A=0.039 12, %ECSF=0.0066 18
235Am 15 m %EC+%B+=?, %A=?
236Am %EC=?, %A=?
237Am 73.0 m 5/2(-) %A=0.025 3, %EC=99.975 3
237m1Am 5 ns
238Am 98 m 1+ %EC+%B+>99.99, %A=1.0E-4 4
238m1Am 35 us
239Am 11.9 h(5/2)- %EC=99.990 1, %A=0.010 1
239m1Am 163 ns (7/2+)
240Am 50.8 h(3-) %EC=100, %A=1.9E-4 7
241Am 432.2 y 5/2- %A=100, %SF=4.3E-10 18
241m1Am 1.2 us
242Am 16.02 h 1- %B-=82.7 3, %EC=17.3 3
242m1Am 141 y 5- %IT=99.541 12, %A=0.459 12, %SF < 4.7E-9
242m2Am 14.0 ms %SF=?, %IT=?
243Am 7370 y 5/2- %A=100, %SF=3.7E-9 9
243m1Am 5.5 us
244Am 10.1 h(6-) %B-=100
244m1Am 26 m 1+ %B-=99.9639 13, %EC=0.0361 13
245Am 2.05 h(5/2)+ %B-=100
245m1Am 0.64 us
246Am 39 m(7-) %B-=100
246m1Am 25.0 m2(-) %B-=100, %IT<0.01
246m2Am 73 us
247Am 23.0 m(5/2) %B-=100
248Am
249Am
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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