100-Fm-249  basic  element

100-fermium-249 Atomic Mass: 249.0790240 +- 0.0001530 amu # Excess Mass: 73611.000 +- 142.000 keV # Binding Energy: 1857913.000 +- 142.000 keV # Beta Decay Energy: B- -3705.000 +- 265.000 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: (7/2+) Half life: 2.6 min Mode of decay: EC to Es-249 Branch ratio: ~85.00 % Decay energy: 2.440 MeV Mode of decay: Alpha to Cf-245 Branch ratio: ~15.00 % Decay energy: 7.810 MeV Possible parent nuclides: Alpha from No-253 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)