element
Information about Argon-53:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:53.006227±0.001074amu #
    Excess Mass (Δ):5.800000±1.000000MeV #
    Binding Energy:407.897000±1.000000MeV #
    β- Decay Energy:17.798000±1.220000MeV #
"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.