L X-ray linewidths of the elements Nb to Sb. I

Abstract
The Lbeta X-ray emission spectra of elements Nb (Z=41) to Sb (Z=51) are determined by a high-resolution double-crystal spectrometer. The L1 linewidths of the elements Zr to Sb obtained show a drop at Sn due to closing of L1-L3M45 Coster-Kronig (CK) processes. A large discrepancy is found between the theory and present experimental data for the L1 linewidths of the elements Z1-L3M45 CK processes by theory.