Molecular orbital analysis of L X-ray cross sections measured for slow Ar-Cu collisions

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Abstract

X-ray production cross sections were determined from thick target analysis of the Ar and Cu L X-ray yields measured for 80–600 keV Ar ions impacting on solid Cu. The Cu cross sections are compared with calculated 3dδ+-3dπ+-3dσ rotational coupling cross sections in the ArCu quasimolecule, while the Ar cross sections are compared with 4fσ electron promotion along with 3dδ -3dπ and 3pπ+ -3pσ rotational coupling cross sections.

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Cited by (2)

  • Modelling the directional and energy dependence of 5-10 keV Ar<sup>+</sup> ion-induced secondary electron yields from Cu crystals

    2011, Surface Science
    Citation Excerpt :

    These orbitals correlate with the 4f, 5f, 4d and 5g levels, respectively, of the united atom [45]. Electron promotion from the Ar 2p level in Ar–Cu collisions requires Rc < 0.2 Å and Ar+ primary energies > 20 keV [68]. Diabatic electron promotion pathways may be inferred by extrapolation of the corresponding adiabatic orbital energy curves through avoided crossings (regions where curves for MOs of similar symmetry approach each other) [3].

Work conducted at the University of Nebraska-Lincoln with support from NSF grant # PHY-8401328 and with additional support from the Creighton University Graduate School.

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