57-La-139
 basic
 fission yield
 n-XS summary
 XS graphs

 element
57-lanthanum-139

  • Atomic Mass: 138.9063482 +- 0.0000035 amu
  • Excess Mass: -87236.114 +- 3.215 keV
  • Binding Energy: 1164555.840 +- 3.221 keV
  • Beta Decay Energy: B- -278.000 +- 7.000 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: 99.9098%
  • Spin: 7/2+
  • Stable Isotope

  • Possible parent nuclides:
    Beta from Ba-139
    Electron capture from Ce-139
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
0stable7/2+ +2.7830455(9) [2H]"N, O"PL 62A 131 (77)/ZP 116 547 (40)
+0.20(1) st "CFBLS, R"ZP A304 285 (82)/ZP A304 279 (82)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.