99-Es-256
 basic

 element
99-einsteinium-256

  • Atomic Mass: 256.0935920 +- 0.0001080 amu #
  • Excess Mass: 87180.000 +- 100.000 keV #
  • Binding Energy: 1901626.000 +- 100.000 keV #
  • Beta Decay Energy: B- 1700.000 +- 100.000 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.
  • Spin: (1+)
  • Half life: 25.4 min
  • Mode of decay: Beta to Fm-256
    • Decay energy: 1.670 MeV

    Meta state at 0.000 Mev
  • Spin: (8+)
  • Half life: ~7.6 h
  • Mode of decay: Beta to Fm-256
    • Decay energy: 1.670 MeV
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)