Analysis of Ar3p6and Kr4p6photoionization from photoelectron-spin-polarization data

Experimental data of the cross section and of the asymmetry parameter $\beta$ in combination with photoelectron-spin-polarization results of Ar $3p^6$ and Kr $4p^6$ subshell photoionization were used to determine the bound-free matrix elements and phase-shift differences of the continuum wave functions in a photon-energy region from threshold to 41 eV. The paper includes a discussion of the first autoionization region between the ${}_{}{}^2{}_{}{}^{}P_{\frac{3}{2}}^{}{}_{}{}^{}$ and ${}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}$ thresholds in the framework of the angular-momentum-transfer formalism. The experimental results are compared with semiempirical and ab initio calculations with the use of line positions and oscillator strengths in the discrete part extrapolated to the continuum in application of the multichannel quantum-defect theory.