Comparison of the structure of various (KLM1)-M-0 and (KLM0)-M-1 x-ray satellite lines of lead

摘要

Multiconfiguration Dirac-Fock calculations (with the inclusion of the transverse Breit interaction and QED corrections) have been performed for various Pb K x-ray lines. The calculated positions and intensities of many electric dipole, electric quadrupole and magnetic dipole (KLM1)-M-0 and (KLM1)-M-0 x-ray satellite lines have been analysed. On the basis of theoretically constructed stick and synthesized (the sum of the Lorentzian natural line shapes) K x-ray spectra, the effect of the additional single ionization of different subshells of the M shell on the shapes and structure of Pb K x-ray spectra has been investigated and compared with the effect of the single L=shell ionization. It has been found that in the (KLM1)-M-0 satellite spectra the sticks are less scattered and the shapes of the bands are narrower and smoother than in the (KLM0)-M-1 spectra. The much weaker influence of an additional M-shell hole on the K x-ray spectra than of an L-shell hole is also reflected in very small values of the energy shifts (with respect to the corresponding diagram lines) of the (KLM1)-M-0 satellite lines in comparison with those of the (KLM0)-M-1 lines. This study provides an exhaustive set of data, enabling not only the correct quantitative analysis of many experimental Pb K x-ray spectra (induced in collisions with various projectiles), but also predictions concerning the K x-ray spectra of multiply ionized Pb or other heavy atoms, which can be helpful in designing new experiments.