127
57
La
element 		Information about Lanthanum-127:

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

    Atomic Mass:126.916160±0.000240amu #
    Excess Mass (Δ):-78.096000±0.224000MeV #
    Binding Energy:1058.560000±0.224000MeV #
    β- Decay Energy:-6.139000±0.373000MeV #
"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: 11/2-)
  • Half life: 5.1 min ( 306 sec., λ = 0.00226519 s-1)
  • Mode of decay:
    E.C.
     to
    127
    56
    Ba
       (Q = 4.690 MeV)
    Meta state at 0.014 Mev
  • Spin: (3/2+) 5.1
  • Half life: 3.7 min ( 222 sec., λ = 0.00312228 s-1)
  • Mode of decay:
    E.C.
     to
    127
    56
    Ba
       (Q = 4.705 MeV)
  • Mode of decay: γ (IT) to
    127
    57
    La
       (Q = 0.015 MeV)

  • Possible parent nuclides:
    E.C. from
    127
    58
    Ce
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)