61-Pm-139
 basic

 element
61-promethium-139

  • Atomic Mass: 138.9167598 +- 0.0000627 amu
  • Excess Mass: -77537.722 +- 58.437 keV
  • Binding Energy: 1151728.035 +- 58.437 keV
  • Beta Decay Energy: B- -5162.512 +- 60.308 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.
  • Spin: (5/2)+
  • Half life: 4.15 min
  • Mode of decay: Electron capture to Nd-139
    • Decay energy: 4.520 MeV

    Meta state at 0.189 Mev
  • Spin: 11/2)-
  • Half life: 180 ms
  • Mode of decay: IT
    • Decay energy: 0.189 MeV
  • Mode of decay: Electron capture to Nd-139
    • Decay energy: 4.709 MeV

  • Possible parent nuclides:
    Electron capture from Sm-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)