91-Pa-227
 basic

 element
91-protactinium-227

  • Atomic Mass: 227.0287932 +- 0.0000083 amu
  • Excess Mass: 26820.644 +- 7.716 keV
  • Binding Energy: 1734175.474 +- 7.722 keV
  • Beta Decay Energy: B- -2186.140 +- 18.394 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: 38.3 min
  • Mode of decay: Alpha to Ac-223
    • Branch ratio: 85.00 %
    • Decay energy: 6.580 MeV
  • Mode of decay: EC to Th-227
    • Branch ratio: 15.00 %
    • Decay energy: 1.019 MeV

  • Possible parent nuclides:
    Alpha from Np-231
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)