The alignment of the M 3 subshell of gold following proton impact ionization was studied with projectile energies in the range from 160 keV up to 5MeV. The experiments were performed by measuring the poIarization of emitted M X-rays be means of a 5 in. Johansson crystal spectrometer. A good agreement of the experimental data and the results of theoretical SCA calculations was found.

Abstract. The energy dependence of the alignment of 42Mo, 4TAg L3 shell and 79Au, 9oTh M 3 shell following impact ionization by ions with atomic number Z 1 =2 (helium) to Z1 = 18 (argon) was studied with a 5 in Johansson crystal spectrometer analyzing the degree of Xray polarization. Experimental information about the amount of multiple ionization was obtained. The observed small negative alignment is concerned to be due to dealignment by couplings between the created vacancies. Large positive values of the alignment parameter as previously reported for the 79Au L 3 shell is slow heavy ion collisions were not observed.

The KαL1 satellite spectrum of 29Cu was measured with a 5 inch Johansson crystal spectrometer after 2 MeV proton impact. The satellite spectrum was simulated by using Voigt profiles with a Lorentzian width which is obtained from the multiconfiguration Dirac–Fock (MCDF) calculations and convoluted with the Gaussian instrumental response function. A unique assignment of the strongest satellite transitions to visible structures in the experimental spectrum was based on a comparison of the predicted linear polarization of the transitions (using in calculations the intermediate coupling scheme) to their measured values. The simulated spectrum of the satellite transitions was fitted to the experiment. The fitted values of energies and relative intensities of the transitions are close to those obtained from the MCDF calculations. The alignment of the (1s2p)−2 double-vacancy state obtained from the measured polarization of the satellite spectrum is given by 𝒜20(1P 1) = −0.77(21) and 𝒜20 (3P) = −0.53(10) (values are not corrected for the Coster–Kronig transition). This is in agreement with the value reported for the KαL1 peak of Al.