18-Ar-31  basic  element

18-argon-31 Atomic Mass: 31.0121260 +- 0.0002210 amu # Excess Mass: 11296.000 +- 206.000 keV # Binding Energy: 224833.000 +- 206.000 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+,3/2+) Half life: 15 ms Mode of decay: EC to Cl-31 Decay energy: 18.360 MeV Mode of decay: EC + Proton to S-30 Branch ratio: 55.00 % Decay energy: 18.070 MeV Mode of decay: EC to Cl-31 Branch ratio: 2.48 % Decay energy: 18.360 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)