element
Information about Thorium-238:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:238.056243±0.000387amu #
    Excess Mass (Δ):52.390000±0.361000MeV #
    Binding Energy:1798.173000±0.361000MeV #
    β- Decay Energy:1.626000±0.366000MeV #
"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.