91-Pa-227  basic  element

91-protactinium-227 Atomic Mass: 227.0287932 +- 0.0000083 amu Excess Mass: 26820.644 +- 7.716 keV Binding Energy: 1734175.474 +- 7.722 keV Beta Decay Energy: B- -2186.140 +- 18.394 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: 38.3 min Mode of decay: Alpha to Ac-223 Branch ratio: 85.00 % Decay energy: 6.580 MeV Mode of decay: EC to Th-227 Branch ratio: 15.00 % Decay energy: 1.019 MeV Possible parent nuclides: Alpha from Np-231 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)