87-Fr-206  basic  element

87-francium-206 Atomic Mass: 205.9984869 +- 0.0001934 amu Excess Mass: -1409.457 +- 180.146 keV Binding Energy: 1596037.209 +- 180.146 keV Beta Decay Energy: B- -4932.000 +- 236.000 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: 2+,3+) Half life: 15.9 s Mode of decay: Alpha to At-202 Decay energy: 6.926 MeV Mode of decay: Electron capture to Rn-206 Decay energy: 7.750 MeV Meta state at 0.000 Mev Spin: (7+) Half life: ?15.9 s Mode of decay: Alpha to At-202 Branch ratio: <=84.00 % Decay energy: 6.926 MeV Meta state at 0.650 Mev Spin: (10-) Half life: 0.7 s Mode of decay: Alpha to At-202 Decay energy: 7.576 MeV Mode of decay: IT to Fr-206 Decay energy: 0.650 MeV Possible parent nuclides: Alpha from Ac-210 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)