250
100
Fm
element 		Information about Fermium-250:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation
    Mass-Energy Data:

    Atomic Mass:250.079515±0.000013amu
    Excess Mass (Δ):74.067510±0.011956MeV
    Binding Energy:1865.527852±0.011961MeV
    β- Decay Energy:-4.633000±0.301000MeV #
"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.
Radioactive Decay Data:

  • Spin: 0+
  • Half life: 33 min ( 1980 sec., λ = 0.000350074 s-1)
  • Mode of decay:
    α
     to
    246
    98
    Cf
       (Q = 7.557 MeV)   Branch ratio: >90.00 %
  • Mode of decay: E.C. to
    250
    99
    Es
       (Q = 0.800 MeV)   Branch ratio: <10.00 %
  • Mode of decay: SF   (Q = 0 0.000 MeV)   Branch ratio: ~0.00060 %
    Meta state at 1.000 Mev 33
  • Half life: 1.8 s ( 1.8 sec., λ = 0.385082 s-1)
  • Mode of decay: γ (IT) to
    250
    100
    Fm
       (Q = 1.000 MeV)   Branch ratio: >80.00 %
  • Mode of decay: SF   (Q = 8 1.000 MeV)   Branch ratio: <0.00008 %

  • Possible parent nuclides:
    E.C. from
    250
    101
    Md
    α from
    254
    102
    No
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)