85-At-203  basic  element

85-astatine-203 Atomic Mass: 202.9868472 +- 0.0001285 amu Excess Mass: -12251.737 +- 119.727 keV Binding Energy: 1584230.228 +- 119.728 keV Beta Decay Energy: B- -6026.000 +- 429.000 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: 7.4 min Mode of decay: Electron capture to Po-203 Branch ratio: 69.00 % Decay energy: 5.060 MeV Mode of decay: Alpha to Bi-199 Branch ratio: 31.00 % Decay energy: 6.210 MeV Possible parent nuclides: Alpha from Fr-207 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)