element
Information about Radium-231:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:231.041220±0.000320amu #
    Excess Mass (Δ):38.396000±0.298000MeV #
    Binding Energy:1757.232000±0.298000MeV #
    β- Decay Energy:2.486000±0.314000MeV #
"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: 2-,1/2+)
  • Half life: 103 s ( 103 sec., λ = 0.00672958 s-1)
  • Mode of decay:
    β-
    to
    231
    89
    Ac

  • Possible parent nuclides:
    β- from
    231
    87
    Fr
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)