105-Db-256  basic  element

105-dubnium-256 Atomic Mass: 256.1081100 +- 0.0003850 amu # Excess Mass: 100704.000 +- 359.000 keV # Binding Energy: 1883407.000 +- 359.000 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. Half life: 2.6 s Mode of decay: Alpha to Lr-252 Branch ratio: <=90.00 % Decay energy: 9.500 MeV Mode of decay: SF Branch ratio: <=40.00 % Mode of decay: EC to Rf-256 Branch ratio: ~10.00 % 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)