89-Ac-209  basic  element

89-actinium-209 Atomic Mass: 209.0095687 +- 0.0002605 amu Excess Mass: 8913.219 +- 242.692 keV Binding Energy: 1608363.795 +- 242.693 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: 0.10 s Mode of decay: Alpha to Fr-205 Branch ratio: ~99.00 % Decay energy: 7.730 MeV Mode of decay: EC to Ra-209 Branch ratio: ~1.00 % Decay energy: 7.110 MeV 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)