Coster-Kronig Corrected Experimental and Theoretical Alignment Parameter for Tungsten-a Comparison

Abstract

An attempt has been made to study the effect of Coster-Kronig (CK) fij correction on alignment parameter (A20) calculated by measuring angular distribution of L x-rays of tungsten (W) in the angular range 0° to 120° at 17.781 keV, the energy that is above L1 edge of W where CK transitions shift the vacancies from L1 and L2 states to L3 state. The experimental CK corrected alignment parameter is compared with the same calculated using non-relativistic dipole approximation in a point Coulomb potential. It is found that the value of alignment is increased by ~32 % of its value by including this CK correction in experimental calculations.