Berkelium: 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/%)
 242Bk   242.06194 7m E.C./ 2.9           
 243Bk   243.062997 4.5h E.C./ 1.506
alpha/ 6.871
6.542/ 0.03
6.5738/ 0.04
6.718/ 0.02
6.7581/ 0.02
 3/2-     0.1466
0.1874
0.755
0.84
0.946
 244Bk   244.06516 4.4h E.C./ 2.25
alpha/ 6.778
 
6.625/ 0.003
6.667/ 0.003
 4-     0.1445
0.1876
0.2176
0.9815
0.9215
 245Bk   245.066357 4.94d E.C./ 0.812
alpha/ 6.453
 
5.8851/ 0.03
6.1467/ 0.02
6.3087/ 0.014
6.3492/ 0.018
 3/2-     Cm L x rays
Cm k x rays
0.25299
0.3809
0.3851
 246Bk   246.06872 1.8d E.C./ 1.5    2-     Cm L x rays
Cm k x rays
0.79881
1.08142
 247Bk   247.0703 1400y alpha/ 5.889 5.501/ 7
5.532/ 45
5.6535/ 5.5
5.678/ 13
5.712/ 17
 3/2-     0.04175
0.0839
0.268
 248Bk   248.073106 23.7h -/ 0.87
E.C./ 0.72
0.86  1-     Cm L x rays
Cf L x rays
Cm k x rays
Cf k x rays
 249Bk   249.07498 320d -/ 0.125
alpha/ 5.525
0.125/ 100
5.539/ 0.0002
5.4174/ 0.001
700 b7/2+ 2 nm    
 250Bk   250.078312 3.217h -/ 1.78 0.74  2-     Cf L x rays
Cf k x rays
0.98912
1.03184
0.04 - 1.6
 251Bk   251.08076 56m -/ 1.09    3/2-     0.02481
0.1528
0.1776