Beryllium: 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/%)
 6Be   6.019725 0.5x10-20s 2p    0+      
 7Be   7.016928 53.28d E.C./ 0.862    3/2-     0.4776/ 10.4
 8Be   8.005305 0.7x10-16s 2 alpha/ 0.046    0+      
 9Be 100 % 9.012182       0.008 b3/2- -1.1776 nm 0.05 b  
 10Be   10.013534 1.52x106y -/ 0.5561 0.555/ 100  <0.001 b0+      
 11Be   11.021658 13.8s -,-alpha/ 11.48 11.48/ 61  1/2+     2.125/ 35.5
 12Be   12.02692 24ms -/ 11.71    0+      
 14Be   13.0375 4ms -/ 16.4    0+