102-No-253  basic  element

102-nobelium-253 Atomic Mass: 253.0906490 +- 0.0002640 amu # Excess Mass: 84439.000 +- 246.000 keV # Binding Energy: 1877806.000 +- 246.000 keV # Beta Decay Energy: B- -4294.000 +- 335.000 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: 1.7 min Mode of decay: Alpha to Fm-249 Branch ratio: ~80.00 % Decay energy: 8.440 MeV Mode of decay: EC to Md-253 Branch ratio: ~20.00 % Decay energy: 3.200 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)