57-La-155  basic  fission yield  element

57-lanthanum-155 Atomic Mass: 154.9581300 +- 0.0009700 amu # Excess Mass: -39002.000 +- 904.000 keV # Binding Energy: 1245463.000 +- 904.000 keV # Beta Decay Energy: B- 9399.000 +- 1142.000 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.