57-La-122  basic  element

57-lanthanum-122 Atomic Mass: 121.9307100 +- 0.0005400 amu # Excess Mass: -64543.000 +- 503.000 keV # Binding Energy: 1004650.000 +- 503.000 keV # Beta Decay Energy: B- -6800.000 +- 780.000 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. Half life: 8.7 s Mode of decay: Electron capture to Ba-122 Decay energy: 9.700 MeV Mode of decay: EC + Proton to Cs-121 Decay energy: 5.300 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)