K-,L-, andM-Shell Atomic Photoeffect for Screened-Potential Models

Abstract

Photoelectric cross sections for $K$ through $M_V$ subshells of iron, tin, and uranium have been numerically computed for x rays from 412 to 1332 keV using a relativistic multipole expansion of the matrix element. Electronic orbitals and partial waves were computed in the central-field approximation. Comparison of screened with unscreened results shows that angular distributions and polarization correlations are essentially unaffected by central-potential screening; total cross sections are merely renormalized by a factor equal to the square of the ratio of screened to Coulomb bound-state normalizations. This normalization effect is used to develop a table of realistic total cross sections for energies 10 to 3000 keV, and atoms $Z=13\mathrm{}$ through 92. These predictions are compared with existing experimental data.