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Angular-differential cross sections for H(2p) formation in intermediate-energy proton-helium collisions

D. G. Seely, S. W. Bross, A. D. Gaus, J. W. Edwards, D. R. Schultz, T. J. Gay, J. T. Park, and J. L. Peacher
Phys. Rev. A 45, R1287(R) – Published 1 February 1992
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Abstract

Angular-differential cross sections for charge transfer with simultaneous emission of a photon in collisions of protons with helium atoms have been measured. The incident proton energies were 25, 50, and 100 keV and the center-of-mass scattering angles were between 0 and 2.0 mrad. In the experiment, hydrogen atoms that scattered through an angle θ were detected in coincidence with photons emitted perpendicular to the scattering plane with a wavelength between 1140 and 1400 Å. Differential cross sections for capture into the 2p state of the hydrogen atom were determined from the variation in the coincidence signal with θ. The experimental results are compared with the results of a classical trajectory Monte Carlo (CTMC) simulation and with the results of a calculation for H(2p) capture using the Coulomb-Brinkman-Kramers (CBK) approximation. The agreement between the experimental results and the CTMC calculation is good at all three energies while the agreement between the shape of the data and the CBK calculation is good at 50 and 100 keV.

  • Received 16 October 1991

DOI:https://doi.org/10.1103/PhysRevA.45.R1287

©1992 American Physical Society

Authors & Affiliations

D. G. Seely, S. W. Bross, A. D. Gaus, J. W. Edwards, D. R. Schultz, T. J. Gay, J. T. Park, and J. L. Peacher

  • Department of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri—Rolla, Rolla, Missouri 65401

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Vol. 45, Iss. 3 — February 1992

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