Measurements of RelativeKRadiative Decay Rates

Abstract

Relative radiative decay rates were measured for $K$-shell vacancies for elements between $Z=62\mathrm{} \mathrm{and} 92$ with a high-resolution Ge(Li) spectrometer. The ratios $\frac{{\alpha }_2}{{\alpha }_1}$, $\frac{{\beta }_1^{\prime }}{{\alpha }_1}$, and $\frac{{\beta }_2^{\prime }}{{\alpha }_1}$ (Siegbahn notation) were determined, with $\frac{{\alpha }_2}{{\alpha }_1}$ significantly higher (4-14%) than those reported by Beckman but in excellent agreement with recent Hartree-Slater calculations of Scofield. The ratios $\frac{{\beta }_1^{\prime }}{{\alpha }_1}$ and $\frac{{\beta }_2^{\prime }}{{\alpha }_1}$ do not agree with either Beckman's experiment or Scofield's calculations.