Measurements of K to L shell vacancy transfer probability for the elements 37 ≤ Z ≤ 42

Abstract

The probabilities for vacancy transfer from K shell to L shell, η kl , are deduced for six elements in the atomic region 37 ≤ Z ≤ 42 by measuring the L X-ray yields from targets excited by 5.96 and 22.6 keV incident photons, i.e. below and above the K edge of the elements and using the theoretical K shell and L shell photoionisation cross-sections. The measured results are found to be in good agreement with those based on relativistic Dirac Hartree Slater (RDHS) calculations and the available semi-empirical values. The theoretical η KL values for the elements with 18 ≤ Z ≤ 96 are least-squares fitted to the fifth-order polynomial in atomic number ( Z).