Abstract
1sσ vacancy production is calculated by approximating the 1sσ molecular wave function with an atomic 1s wave function for a chargeZ(R) centered at a distanceh(R) from the heavier nucleus.h(R) andZ(R) are determined by minimizing the 1sσ electronic energy. Previous calculations with the atomic semi-classical approximation (h=0,Z(R)=Z 2, the target atomic number) showed that the probability of making CuK vacancies in 0.5- to 2-MeV/a.m.u. H+, D+, and He++Cu collisions can be written asP(θ)=A(1+Bcosθ), whereθ is the scattering angle andA andB are constants forθ≳10°. Although the recoil and dipole excitation contributions toP(θ) (which interfere destructively in the atomic theory) are independently smaller in the molecular calculations, similarB values are obtained.
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W.E. Meyerhof, by asking whether one should use the Briggs model or the Andersen model for 1sσ excitation drew my attention to this problem. P.A. Amundsen drew my attention to Jakubassa's paper. This work was supported in part by the National Science Foundation.
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Anholt, R. Molecular theory ofK-vacancy production in heavy-ion-atom collisions at small impact parameters. Z Physik A 295, 201–208 (1980). https://doi.org/10.1007/BF01412198
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DOI: https://doi.org/10.1007/BF01412198