Double-vacancy transitions in the copperKβ1,3emission spectrum

Abstract

The ${\beta }^{\prime }$ and ${\beta }^{\prime \prime }$ satellites in the measured Cu $K{\beta }_{1,3}$ emission spectrum are shown to be due to the double-vacancy transitions $1s3p^{6}3d^{91,3}D\to 1s^{2}3p^{5}3d^{91,3} \mathrm{PDF}$. This assignment is consistent with an earlier analysis of a highly resolved Cu $K{\alpha }_{1,2}$ spectrum. The $M_2$ and $M_3$ level widths are estimated to be 1.68 eV, in agreement with 2.0±0.3 eV and 1.6±0.3 eV, respectively, from photoelectron spectroscopy, and a calculated width of 2.0 eV. Comparison of the calculated double-vacancy transition array with the neighboring elements $30\le Z\le 32$ suggest a similar identification to the ${\beta }^{\prime }$ and ${\beta }^{\prime \prime }$ satellites in their $K{\beta }_{1,3}$ spectra.