99-Es-248  basic  element

99-einsteinium-248 Atomic Mass: 248.0754580 +- 0.0000560 amu # Excess Mass: 70289.000 +- 52.000 keV # Binding Energy: 1853946.000 +- 52.000 keV # Beta Decay Energy: B- -1608.000 +- 54.000 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-,0+) Half life: 27 min Mode of decay: EC to Cf-248 Branch ratio: >99.00 % Decay energy: 3.060 MeV Mode of decay: Alpha to Bk-244 Branch ratio: ~0.25 % Decay energy: 7.166 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)