Curium: 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/%)
 236Cm   236.05139               
 237Cm   237.05276               
 238Cm   238.05302 2.4h E.C./ 0.96
alpha/ 6.632
6.52  0+      
 239Cm   239.05484 3h E.C./ 1.7          0.0407
0.1466
0.1874
 240Cm   240.055503 27d alpha/ 6.397 5.989/ 0.014
6.147/ 0.05
6.2478/ 28.8
6.2906/ 70.6
 0+      
 241Cm   241.057645 4 alpha/ 6.184  
5.8842/ 0.12
5.9291/ 0.18
5.9389/ 0.69
 1/2+     Am k x rays
0.13241
0.16505
0.18028
0.43063
0.47181
 242Cm   242.05883 162.8d alpha/ 6.216 5.9694/ 0.035
6.069/ 25
6.1129/ 74
20 b0+     Pu L x rays
0.04408
0.10189
0.04 - 1.2
 243Cm   243.061381 28.5y alpha/ 6.167 5.6856/ 1.6
5.742/ 10.6
5.7859/ 73.3
5.9922/ 6.5
6.0589/ 5
130 b5/2+ 0.41 nm   Pu L x rays
Pu k x rays
0.10612
0.20975
0.22819
0.2776
0.28546
0.33431
0.04 - 0.7
 244Cm   244.062747 18.11y alpha/ 5.902 5.6656/ 0.02
5.7528/ 24
5.805/ 76
15 b0+     Pu L x rays
0.04282
0.09885
0.15262
 245Cm   245.065483 8500y alpha/ 5.623 5.235/ 0.3
5.3038/ 5
5.362/ 93
5.4927/ 0.8
5.5331/ 0.6
350 b7/2+ 0.5 nm   Pu L x rays
Pu k x rays
0.04195
0.13299
0.13606
0.17494
 246Cm   246.067218 4780y alpha/ 5.476 5.343/ 21
5.386/ 79
1.2 b0+     Pu L x rays
0.04453
 247Cm   247.070347 1.56x107y alpha/ 5.352 4.818/ 4.7
4.869/ 71
4.982/ 2
5.2104/ 5.7
5.2659/ 13.8
60 b9/2- 0.37 nm   Pu k x rays
0.2792
0.2886
0.3471
0.4035
 248Cm   248.072343 3.4x105y alpha/ 5.162
S.E.
4.931/ 0.07
5.0349/ 16.5
5.0784/ 1
2.6 b0+      
 249Cm   249.075948 64.15m -/ 0.902 0.9 1.6 b1/2+     Bk k x rays
0.56039
0.63431
 250Cm   250.078352 9700y S.E.,alpha/ 5.27   80 b0+      
 251Cm   251.08229 16.8m -/ 1.42 0.9/ 16  1/2+     0.3896
0.5299
0.5425