Isotopes of Uranium (Z=92)
Click on an isotope to get more information about its decay
Isotope
 Halflife
 Spin
Parity
 Decay Mode(s) or
Abundance 
^{ 218}U
 1.5 ms  0+ 
%A=100

^{ 219}U
 42 us  
%A=?

^{ 220}U
  

^{ 221}U
  

^{ 222}U
 1.0 us  0+ 
%A=100

^{ 223}U
 18 us  
%A=?

^{ 224}U
 0.9 ms  0+ 
%A=100

^{ 225}U
 95 ms  
%A=100

^{ 226}U
 0.35 s  0+ 
%A=100

^{ 227}U
 1.1 m  (3/2+) 
%A=100, %EC+%B+ < 0.001

^{ 228}U
 9.1 m  0+ 
%EC<5, %A>95

^{ 229}U
 58 m  (3/2+) 
%EC+%B+ ~ 80, %A ~ 20

^{ 230}U
 20.8 d  0+ 
%A=100, %SF < 1.4E10

^{ 231}U
 4.2 d  (5/2) 
%EC=100, %A ~ 0.0055

^{ 232}U
 68.9 y  0+ 
%A=100, %24NE=9E11 7

^{ 233}U
 1.592e+5 y  5/2+ 
%A=100, %SF < 6E11, %24NE < 9.5E11

^{ 234}U
 2.455e+5 y  0+ 
%Abundance=0.0055 5, %A=100, %SF=1.64E9 22, %NE=9E12 7, %MG=1.4E11 3

^{ 235}U
 7.038e+8 y  7/2 
%Abundance=0.7200 12, %A=100, %SF=7.0E9 21, %20NE=8E10 4

^{235m1}U
 25 m  1/2+ 
%IT=100

^{ 236}U
 2.342e7 y  0+ 
%A=100, %SF=9.4E8 4

^{ 237}U
 6.75 d  1/2+ 
%B=100

^{ 238}U
 4.468e+9 y  0+ 
%Abundance=99.2745 60, %A=100, %SF=5.45E5 7, %BB=2.2E10 7

^{238m1}U
 225 ns  0+ 

^{238m2}U
 1 ns  

^{ 239}U
 23.45 m  5/2+ 
%B=100

^{ 240}U
 14.1 h  0+ 
%B=100

^{ 241}U
  

^{ 242}U
 16.8 m  0+ 
%B=100

Last update on
February 15, 2012