Uranium: Properties


Isotopes
  Natural
Abun. (%)
Atomic
Mass
Half-
life
Decay Mode
/Energy (/MeV)
Part. En.
/Intensity
(MeV/%)
Cross-sect.
Ther. Neut.
(b)
Spin
(h/2 pi)
Magnetic
Dipl.Mom.
(nm)
Electric
Quad. Mom.
(b)
Gamma En.
/Intensity
(MeV/%)
 222U     1Ás alpha           
 225U     0.08s alpha 7.88/ 90         
 226U   226.02917 0.5s alpha/ 7.56 7.43  0+      
 227U   227.03099 1.1m alpha/ 7.2 6.87         
 228U   228.031356 9.1m alpha/ 6.803 6.404/ 0.6
6.44/ 0.7
6.589/ 29
6.81/ 70
 0+     0.095
0.152
0.187
0.246
 229U   229.033474 58m E.C./ 1.305
alpha/ 6.473
6.223/ 3
6.297/ 11
6.332/ 20
6.23/ 64
 3/2+      
 230U   230.033921 20.8d alpha/ 5.992 5.5866/ 0.01
5.6624/ 0.26
5.6663/ 0.38
5.8178/ 32
5.8887/ 67
 0+     Th L x rays
0.07218
0.15421
0.23034
 231U   231.03627 4.2d E.C./ 0.33    5/2-     Pa L x rays
Th L x rays
0.02564
0.0842
 232U   232.03713 68.9y alpha/ 5.414 4.9979/ 0.003
5.1367/ 0.3
5.2635/ 31
5.3203/ 69
73 b0+      
 233U   233.039628 1.59x105y alpha/ 4.909 4.783/ 13.2
4.8247/ 84.4
4.51/ 4.804
47 b5/2+ 0.59 nm 3.66 b Th L x rays
0.04244
0.09714
 234U 0.0055 % 234.040946 2.45x105y alpha/ 4.856 4.604/ 0.24
4.7231/ 27.5
4.776/ 72.5
96 b0+     0.05323
0.12091
 235mU     26m I.T./ 0.0007    1/2+      
 235U 0.72 % 235.043924 7.04x108y alpha/ 4.6793 4.2157/ 5.7
4.3641/ 11
4.37/ 6
4.3952/ 55
4.597/ 5
95 b7/2- -0.38 nm 4.6 b Th L x rays
Th k x rays
0.10917
0.14378
0.16338
0.18574
0.20213
0.20533
0.2214
 236U   236.045562 2.34x107y alpha/ 4.569 4.332/ 0.26
4.445/ 26
4.494/ 74
5.1 b0+     Th L x rays
0.04937
0.11275
 237U   237.048724 6.75d -/ 0.519 0.24
0.25
100 b1/2+     Np L x rays
Np k x rays
0.05953
0.20801
 238U 99.2745 % 238.050784 4.46x109y alpha 4.039/ 0.23
4.147/ 23
4.196/ 77
2.7 b0+     Th L x rays
0.04955
 239U   239.054289 23.5m -/ 1.264 1.2
1.3
22 b5/2+     0.04354
0.07467
 240U   240.056587 14.1h -/ 0.39 0.36  0+     Np L x rays
0.0441
0.05558
0.0676
 242U     16.8m -/ 1.2