element
Information about Erbium-177:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:176.954370±0.000640amu #
    Excess Mass (Δ):-42.504000±0.596000MeV #
    Binding Energy:1417.928000±0.596000MeV #
    β- Decay Energy:4.965000±0.667000MeV #
"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.