Investigations of molecular orbitals with Accel-Decel beams

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Abstract

Quasimolecular transition energies can be found directly from the impact-parameter dependence of interference structure observed in measured K X-ray spectra. As these experiments require a K-vacancy bearing projectile at collision velocities small compared to the equivalent K-shell electron velocity, the accel-decel technique has to be used. Such an experiment was performed at the BNL Tandem Accel-Decel Facility for collisions of Cl16+ with Ar at energies ranging from 2.5 to 20 MeV. A new method of analysis using the uniform asymptotic approximation is described here. Quasimolecular transition energies derived using this method are compared to results of a previous analysis based on the determination of the relative positions of maxima and minima in the interference patterns.

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Work supported by Fundamental Interactions Branch, Division of Chemical Sciences, Office of basic Energy Sciences, US Department of Energy under Contract No. DE-AC02-76CH00016.

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