87-Fr-200  basic  element

87-francium-200 Atomic Mass: 200.0064990 +- 0.0002520 amu # Excess Mass: 6054.000 +- 235.000 keV # Binding Energy: 1540146.000 +- 235.000 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: (3+) Half life: 19 ms Mode of decay: Alpha to At-196 Decay energy: 7.630 MeV Meta state at 0.200 Mev Spin: (10-) Half life: 0.57 s Mode of decay: Alpha to At-196 Decay energy: 7.830 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)