Polarization of the KαL1x-ray satellite in copper after 2 MeV proton impact

Abstract

The KαL1satellite spectrum of 29Cuwas measured with a 5 inch Johansson crystal spectrometer after 2 MeVproton impact. The satellite spectrum was simulated by using Voigt profiles witha Lorentzian width which is obtained from the multiconfiguration Dirac–Fock(MCDF) calculations and convoluted with the Gaussian instrumental responsefunction. A unique assignment of the strongest satellite transitions to visiblestructures in the experimental spectrum was based on a comparison of thepredicted linear polarization of the transitions (using in calculations theintermediate coupling scheme) to their measured values. The simulated spectrumof the satellite transitions was fitted to the experiment. The fitted valuesof energies and relative intensities of the transitions are close to thoseobtained from the MCDF calculations. The alignment of the (1s2p)−2double-vacancy state obtained from the measured polarization ofthe satellite spectrum is given by \U0001d49c20(1P1) = −0.77(21)and \U0001d49c20 (3P) = −0.53(10)(values are not corrected for the Coster–Kronig transition). This isin agreement with the value reported for the KαL1peak of Al.