The Determination of Gamma‐Ray Energies from Beta‐Ray Spectroscopy and a Table of Critical X‐Ray Absorption Energies

The significance and limitations of the use of x‐ray absorption energies in the determination of gamma‐ray energies from beta‐ray spectroscopy are discussed. A complete table of critical x‐ray absorption energies, based primarily on the work of Siegbahn and derived using the 1950 values of the physical atomic constants, is given, with interpolation and extrapolations for elements between Z=3 and Z=100.