89-Ac-221
 basic

 element
89-actinium-221

  • Atomic Mass: 221.0155757 +- 0.0000542 amu
  • Excess Mass: 14508.712 +- 50.495 keV
  • Binding Energy: 1699624.176 +- 50.496 keV
  • Beta Decay Energy: B- -2417.928 +- 51.397 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.
  • Half life: 52 ms
  • Mode of decay: Alpha to Fr-217
    • Decay energy: 7.780 MeV

  • Possible parent nuclides:
    Alpha from Pa-225
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)