L-shell shake processes resulting from1sphotoionization in elements11<~Z<~17

The photoinduced $K\alpha$ x-ray spectra of elements between sodium and chlorine were measured by means of high-resolution crystal diffractometry. The $K{\alpha }_{1,2}{L}^{\mathrm{}\left(1\right)\mathrm{}}$ satellites were observed and resolved from the corresponding diagram lines. The probabilities for producing via shake processes $K^{\mathrm{}\left(1\right)\mathrm{}}{L}^{\mathrm{}\left(1\right)\mathrm{}}$ double-hole states were deduced from the satellite to parent diagram line yield ratios. The results are compared to theoretical sudden approximation predictions. A satisfactory agreement is found except for sodium and chlorine for which our experimental results are markedly underestimated by the calculations.