element
Information about Bismuth-189:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:188.989505±0.000430amu #
    Excess Mass (Δ):-9.776000±0.401000MeV #
    Binding Energy:1470.321000±0.401000MeV #
"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: (9/2-)
  • Half life: 680 ms ( 0.68 sec., λ = 1.01933 s-1)
  • Mode of decay:
    α
    to
    185
    81
    Tl
      (Q = 7.267 MeV)   Branch ratio: >50.00 %
  • Mode of decay: E.C. to
    189
    82
    Pb
      (Q = 8.000 MeV)   Branch ratio: <50.00 %
    Meta state at 0.092 Mev
  • Spin: (1/2+) 80
  • Half life: 5 ms ( 0.005 sec., λ = 138.629 s-1)
  • Mode of decay:
    α
    to
    185
    81
    Tl
      (Q = 7.359 MeV)   Branch ratio: >50.00 %
  • Mode of decay: E.C. to
    189
    82
    Pb
      (Q = 8.092 MeV)   Branch ratio: <50.00 %

  • Possible parent nuclides:
    α from
    193
    85
    At
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)