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

Journal Article · Sat Feb 01 00:00:00 EST 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.R1287· OSTI ID:7276740

Seely, D G; Bross, S W; Gaus, A D; Edwards, J W; Schultz, D R; Gay, T J; Park, J T; Peacher, J L ^[1]

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1. Department of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri Rolla, Rolla, Missouri 65401 (United States)

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 {theta} were detected in coincidence with photons emitted perpendicular to the scattering plane with a wavelength between 1140 and 1400 A. Differential cross sections for capture into the 2{ital p} state of the hydrogen atom were determined from the variation in the coincidence signal with {theta}. 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(2{ital p}) 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.

• OSTI ID: 7276740
• Journal Information: Physical Review A. General Physics; (United States), Vol. 45:3; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ION-ATOM COLLISIONS
HYDROGEN
ELECTRON TRANSFER
PROTONS
DIFFERENTIAL CROSS SECTIONS
KEV RANGE 10-100
P STATES
ATOM COLLISIONS
BARYONS
COLLISIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
FERMIONS
FLUIDS
GASES
HADRONS
ION COLLISIONS
KEV RANGE
NONMETALS
NUCLEONS
RARE GASES
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)