63-Eu-166  basic  fission yield  element

63-europium-166 Atomic Mass: 165.9499700 +- 0.0008600 amu # Excess Mass: -46603.000 +- 801.000 keV # Binding Energy: 1337154.000 +- 801.000 keV # Beta Decay Energy: B- 7797.000 +- 999.000 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.