Basic Info

n-XS summary


element
Information about Einsteinium-255:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:255.090266±0.000012amu
    Excess Mass (Δ):84.082584±0.011066MeV
    Binding Energy:1896.651745±0.011072MeV
    β- Decay Energy:0.289620±0.010247MeV
"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: (7/2+)
  • Half life: 39.8 days ( 3.43872×10+06 sec., λ = 2.01571×10-07 s-1)
  • Mode of decay:
    β-
    to
    255
    100
    Fm
      (Q = 0.288 MeV)   Branch ratio: 92.00 %
  • Mode of decay:
    α
    to
    251
    97
    Bk
      (Q = 6.436 MeV)   Branch ratio: 8.00 %
  • Mode of decay: SF   Branch ratio: 0.0041 %

  • Possible parent nuclides:
    β- from
    255
    98
    Cf
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)