12-Mg-31  basic  element

12-magnesium-31 Atomic Mass: 30.9965485 +- 0.0000813 amu Excess Mass: -3215.089 +- 75.711 keV Binding Energy: 244037.856 +- 75.711 keV Beta Decay Energy: B- 11739.092 +- 78.396 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: 230 ms Mode of decay: Beta to Al-31 Decay energy: 11.740 MeV Mode of decay: Beta + Neutron to Al-30 Branch ratio: 1.70 % Decay energy: 4.590 MeV Possible parent nuclides: Beta from Na-31 Beta + N from Na-32 Beta + 2 N from Na-33 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)