93-Np-231  basic  element

93-neptunium-231 Atomic Mass: 231.0382332 +- 0.0000543 amu Excess Mass: 35613.955 +- 50.592 keV Binding Energy: 1756102.748 +- 50.593 keV Beta Decay Energy: B- -2818.000 +- 113.000 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: (5/2) Half life: 48.8 min Mode of decay: Electron capture to U-231 Branch ratio: 98.00 % Decay energy: 1.840 MeV Mode of decay: Alpha to Pa-227 Branch ratio: 2.00 % Decay energy: 6.370 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)