element
Information about Berkelium-251:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:251.080753±0.000012amu
    Excess Mass (Δ):75.221333±0.010985MeV
    Binding Energy:1874.792412±0.010990MeV
    β- Decay Energy:1.093000±0.010000MeV
"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: (3/2-)
  • Half life: 55.6 min ( 3336 sec., λ = 0.000207778 s-1)
  • Mode of decay:
    β-
    to
    251
    98
    Cf
      (Q = 1.093 MeV)
  • Mode of decay: α to
    247
    95
    Am
      (Q = 5.570 MeV)   Branch ratio: ~1.0E-5 %

  • Possible parent nuclides:
    β- from
    251
    96
    Cm
    α from
    255
    99
    Es
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)