156
73
Ta
element 		Information about Tantalum-156:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation
    Mass-Energy Data:

    Atomic Mass:155.971689±0.000640amu #
    Excess Mass (Δ):-26.371000±0.596000MeV #
    Binding Energy:1228.386000±0.596000MeV #
"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-)
  • Half life: 144 ms ( 0.144 sec., λ = 4.81352 s-1)
  • Mode of decay:
    E.C.
     to
    156
    72
    Hf
       (Q = 11.600 MeV)   Branch ratio: 95.80 %
  • Mode of decay:
    1
    1
    p+ emission to
    155
    72
    Hf
       (Q = 1.029 MeV)   Branch ratio: 4.20 %
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)