65-Tb-138  basic  element

65-terbium-138 Atomic Mass: 137.9528700 +- 0.0008600 amu # Excess Mass: -43901.000 +- 801.000 keV # Binding Energy: 1106891.000 +- 801.000 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.