element
Information about Thorium-220:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:220.015733±0.000024amu
    Excess Mass (Δ):14.655310±0.022329MeV
    Binding Energy:1690.623902±0.022331MeV
    β- Decay Energy:-5.722509±0.061015MeV
"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: 9.7 µs ( 9.7×10-06 sec., λ = 71458.5 s-1)
  • Mode of decay:
    α
    to
    216
    88
    Ra
      (Q = 8.953 MeV)
  • Mode of decay: E.C. to
    220
    89
    Ac
      (Q = 0.910 MeV)   Branch ratio: 2.0E-7 %

  • Possible parent nuclides:
    α from
    224
    92
    U
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)