Basic Info

n-XS summary


element
Information about Plutonium-240:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:240.053807±0.000002amu
    Excess Mass (Δ):50.121319±0.001947MeV
    Binding Energy:1813.454935±0.001974MeV
    β- Decay Energy:-1.378952±0.013790MeV
"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: 6564 years ( 2.07029×10+11 sec., λ = 3.34808×10-12 s-1)
  • Mode of decay:
    α
    to
    236
    92
    U
      (Q = 5.256 MeV)
  • Mode of decay: SF   Branch ratio: 5.7E-6 %
    Meta state at 2.800 Mev
  • Spin: (0+) 6564
  • Half life: 3.7 ns ( 3.7×10+09 sec., λ = 1.87337×10-10 s-1)
  • Mode of decay: SF   Branch ratio: >0.00 %

  • Possible parent nuclides:
    β- from
    240
    93
    Np
    E.C. from
    240
    95
    Am
    α from
    244
    96
    Cm
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)