Nobelium: 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/%)
 250No     0.25ms S.E.    0+      
 251No   251.08887 0.8s alpha 8.6/ 80
8.68/ 20
        
 252No   252.088949 2.3s alpha/ 8.551
S.E.
8.42
8.37
 0+      
 253No   253.09053 1.7m alpha,E.C./ 3.1 8.01  9/2-      
 254mNo     0.28s I.T.           
 254No   254.090953 55s alpha,E.C. 8.09  0+      
 255No   255.09326 3.1m alpha,E.C./ 2.01 8.12
7.93
8.08
 1/2+     0.187
 256No   256.094252 2.9s alpha 8.43  0+      
 257No   257.09685 25s alpha 8.22
8.27
8.32
 7/2+      
 258No   258.09815 1.2ms S.E.    0+      
 259No   259.100931 58m alpha/ 7.794
E.C.
7.5
7.53
 9/2+      
 262No     8ms S.E.