4-Be-11  basic  element

4-beryllium-11 Atomic Mass: 11.0216577 +- 0.0000068 amu Excess Mass: 20173.970 +- 6.356 keV Binding Energy: 65481.167 +- 6.356 keV Beta Decay Energy: B- 11505.986 +- 6.370 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: 1/2+ Half life: 13.81 s Mode of decay: Beta to B-11 Decay energy: 11.506 MeV Mode of decay: Beta + Alpha to Li-7 Branch ratio: 3.1 % Decay energy: 2.841 MeV Possible parent nuclides: Beta from Li-11 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)