89-Ac-217
 basic
 element
89-actinium-217
  • Atomic Mass: 217.0093327 +- 0.0000140 amu
  • Excess Mass: 8693.330 +- 13.026 keV
  • Binding Energy: 1673154.266 +- 13.029 keV
  • Beta Decay Energy: B- -3477.726 +- 31.662 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: 9/2-
  • Half life: 69 ns
  • Mode of decay: Alpha to Fr-213
    • Decay energy: 9.832 MeV
  • Mode of decay: EC to Ra-217
    • Branch ratio: <=2.00 %
    • Decay energy: 2.819 MeV
    Meta state at 1.528 Mev
  • Spin: 21/2-
  • Half life: <10 ns
  • Mode of decay: IT to Ac-217
    • Branch ratio: >=99.60 %
    • Decay energy: 1.528 MeV
  • Mode of decay: Alpha to Fr-213
    • Branch ratio: <=0.48 %
    • Decay energy: 11.360 MeV
    Meta state at 2.013 Mev
  • Spin: 29/2)+
  • Half life: 740 ns
  • Mode of decay: IT to Ac-217
    • Branch ratio: 95.70 %
    • Decay energy: 2.013 MeV
  • Mode of decay: Alpha to Fr-213
    • Branch ratio: 4.30 %
    • Decay energy: 11.845 MeV

  • Possible parent nuclides:
    Alpha from Pa-221
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
069 ns9/2- +3.83(5) TDPADNP A436 311 (85)
2013740 ns29/2+ +5.03(70 TDPADNP A436 311 (85)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.