57-La-138
 basic
 fission yield
 n-XS summary
 XS graphs

 element
57-lanthanum-138

  • Atomic Mass: 137.9071068 +- 0.0000044 amu
  • Excess Mass: -86529.421 +- 4.118 keV
  • Binding Energy: 1155777.825 +- 4.122 keV
  • Beta Decay Energy: B- 1044.439 +- 10.580 keV
"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.
  • Atomic Percent Abundance: 0.0902%
  • Spin: 5+
  • Half life: 1.05E+11 years
  • Mode of decay: Electron capture to Ba-138
    • Branch ratio: 66.40 %
    • Decay energy: 1.737 MeV
  • Mode of decay: Beta to Ce-138
    • Branch ratio: 33.60 %
    • Decay energy: 1.044 MeV
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)
Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev)T1/2Spin    m(nm)    Q(b)    Ref. Std.MethodReference
01.1x10*11 y5+ +3.713646(7) [139La]NPL 62A 131 (77)/PR 99 613 (55)
+0.45(2) st [139La]ABLDFPR A20 1922 (79)
0.43(2) st [139La]QIRPL 62A 131 (77)
73116 ns3+ +2.89(5) [19F 197]TDPADZP A291 49 (79)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.