Lαx-ray spectra of elements betweenZr40andCd48

The $L\alpha$ spectra for elements between ${}_{40}{}^{}{}_{}{}^{}\mathrm{Zr}$ and ${}_{48}{}^{}{}_{}{}^{}\mathrm{Cd}$ have been measured at high instrumental resolution. The natural widths of the diagram $L{\alpha }_1$ line ($L_3-M_5$ transitions) of these elements are determined. The observed linewidths from Mo to Ag are systematically narrower than those predicted by theory. We suggest that a reason for this disagreement are too large theoretical Auger transition rates assumed for the $M_{4,5}$ shells of Mo to Ag. Owing to high resolution, characteristic features of satellites of $L{\alpha }_{1,2}$ diagram lines are revealed.