102-No-254
 basic

 element
102-nobelium-254

  • Atomic Mass: 254.0909487 +- 0.0000190 amu
  • Excess Mass: 84718.198 +- 17.660 keV
  • Binding Energy: 1885597.748 +- 17.663 keV
  • Beta Decay Energy: B- -5252.000 +- 337.000 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: 0+
  • Half life: 55 s
  • Mode of decay: Alpha to Fm-250
    • Branch ratio: 90.00 %
    • Decay energy: 8.226 MeV
  • Mode of decay: EC to Md-254
    • Branch ratio: 10.00 %
    • Decay energy: 1.140 MeV
  • Mode of decay: SF
    • Branch ratio: 0.25 %

    Meta state at 0.500 Mev
  • Half life: 0.28 s
  • Mode of decay: IT to No-254
    • Branch ratio: >80.00 %
    • Decay energy: 0.500 MeV
  • Mode of decay: SF
    • Branch ratio: >=0.20 %
    • Decay energy: 0.500 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)