Californium: 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/%)
 239Cf   239.06253 0.7m alpha           
 240Cf   240.06228 1.1m alpha/ 7.719 7.59  0+      
 241Cf   241.06352 4m E.C./ 3.1
alpha/ 7.6
 
7.335
        
 242Cf   242.06369 3.5m alpha/ 7.509 7.351/ 20
7.385/ 80
 0+      
 243Cf   243.06539 11m E.C./ 2.2
alpha/ 7.4
7.06/ 20
7.17/ 4
 1/2+      
 244Cf   244.065979 20m alpha/ 7.328 7.168/ 25
7.21/ 75
 0+      
 245Cf   245.068037 44m alpha/ 7.255
E.C./ 1.565
6.886
6.983
7.036
7.084
7.137
        
 246Cf   246.0688 1.49h alpha/ 6.869 6.6156/ 0.18
6.7086/ 21.8
6.7501/ 78
 0+     Cm L x rays
0.04221
0.0945
0.147
 247Cf   247.07102 3.11h E.C./ 0.65
alpha/ 6.55
 
6.301
 7/2+     Bk k x rays
0.2941
0.4778
 248Cf   248.074844 334d alpha/ 6.369 6.22/ 17
6.262/ 83
 0+      
 249Cf   249.074844 351y alpha/ 6.295 5.7582/ 3.7
5.8119/ 84
5.9029/ 2.8
5.9451/ 4
6.194/ 2.2
500 b9/2-     Cm L x rays
Cm k x rays
0.25299
0.33351
0.38832
 250Cf   250.0764 13.1y alpha/ 6.129 5.8913/ 0.3
5.9889/ 15
6.031/ 84.5
2000 b0+     Cm L x rays
0.04285
 251Cf   251.07958 900y alpha/ 6.172 5.632/ 4.5
5.6773/ 35
5.8124/ 4.2
5.8514/ 27
6.014/ 11.6
2900 b1/2+      
 252Cf   252.081621 2.64y alpha/ 6.217
S.E.
5.7977/ 0.23
6.0756/ 15.2
6.1184/ 81.6
20 b0+     Cm L x rays
0.04339
0.1002
 253Cf   253.085127 17.8d -/ 0.29
alpha/ 6.126
0.27/ 100
5.921/ 0.02
18 b7/2+      
 254Cf   254.087318 60.5d S.E.,alpha/ 5.93 5.792/ 0.05
5.834/ 0.26
4.5 b0+      
 255Cf     1.4h -           
 256Cf     12m S.E.