99-Es-249
 basic

 element
99-einsteinium-249

  • Atomic Mass: 249.0764050 +- 0.0000320 amu #
  • Excess Mass: 71170.000 +- 30.000 keV #
  • Binding Energy: 1861136.000 +- 30.000 keV #
  • Beta Decay Energy: B- -2440.000 +- 145.000 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: 7/2(+)
  • Half life: 102.2 min
  • Mode of decay: Electron capture to Cf-249
    • Branch ratio: 99.43 %
    • Decay energy: 1.450 MeV
  • Mode of decay: Alpha to Bk-245
    • Branch ratio: 0.57 %
    • Decay energy: 6.940 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)