Alignment of He- and H-like P states of 48-MeV foil-excited Mg ions

J. Palinkas, G. J. Pedrazzini, D. A. Church, R. A. Kenefick, C. A. Fulton, R. L. Watson, D. W. Wang

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Abstract

The angular distributions of the P1, P3, and P2 lines of 2-MeV/amu Mg projectiles excited by collision with carbon and aluminum atoms in thin foils have been measured with a pivoted plane-crystal Bragg spectrometer. Both the polarizations of these lines and the reflection properties of the ammonium dihydrogen phosphate (ADP) diffraction crystal have been determined. The 0/1 cross-section ratios for populating the 2p(m=0) and 2p(m=1) states in the 1s2p He-like and the 2p H-like configurations were deduced from the polarization values and compared with the coupled-states calculation of Reading et al., assuming that the mechanism populating these states is the capture of electrons from the K shell of the target. The agreement between theory and experiment is very good for carbon excitation, but for aluminum excitation the theory significantly overestimates the cross-section ratio. The influence of foil tilting and cascade contributions on the polarization were investigated experimentally and taken into account in the analysis of the measurements.

Original languageEnglish
Pages (from-to)598-606
Number of pages9
JournalPhysical Review A
Volume31
Issue number2
DOIs
Publication statusPublished - Jan 1 1985

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Palinkas, J., Pedrazzini, G. J., Church, D. A., Kenefick, R. A., Fulton, C. A., Watson, R. L., & Wang, D. W. (1985). Alignment of He- and H-like P states of 48-MeV foil-excited Mg ions. Physical Review A, 31(2), 598-606. https://doi.org/10.1103/PhysRevA.31.598