2-He-4
 basic
 n-XS summary
 XS graphs

 element
2-helium-4

  • Atomic Mass: 4.0026032 +- 0.0000000 amu
  • Excess Mass: 2424.911 +- 0.001 keV
  • Binding Energy: 28295.673 +- 0.005 keV
  • Beta Decay Energy: B- -22895.261 +- 212.132 keV
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
  • Atomic Percent Abundance: 99.999863%(3
  • Spin: 0+
  • Stable Isotope

  • Possible parent nuclides:
    Neutron emission from He-5
    Proton emission from Li-5
    2 Proton from Be-6
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)