Absolute differential cross sections for small-angle H sup + -He direct and charge-transfer scattering at keV energies

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.3626· OSTI ID:5336907

Johnson, L K; Gao, R S; Dixson, R G; Smith, K A; Lane, N F; Stebbings, R F ^[1]; Kimura, M ^[2]

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1. Department of Physics, Department of Space Physics and Astronomy, and Rice Quantum Institute, Rice University, P.O. Box 1892, Houston, Texas 77251 (US)
2. Department of Physics, Rice University, Houston, Texas 77251 Argonne National Laboratory, ER 203, 9700 Cass Avenue, Argonne, Illinois 60439

This paper reports measurements and calculations of absolute differential cross sections for H{sup +}-He charge-transfer and direct scattering. Charge-transfer measurements have been obtained at 5.0 keV laboratory energy over the laboratory angular range 0.02{degree}--1.0{degree}, while direct scattering has been observed at 0.5, 1.5, and 5.0 keV laboratory energy over a closely corresponding angular range. Calculations are reported for 0.5, 1.5, and 5.0 keV charge-transfer and direct scattering. The measured cross sections are in good agreement with those derived from fully quantum-mechanical molecular-orbital close-coupling calculations. Direct scattering cross sections are also found to be in agreement with single-potential calculations using directly summed Jeffreys-Wentzel-Kramers-Brillouin phase shifts derived from proposed H{sup +}-He ground-state interaction potentials. The cross sections exhibit significant structure over the range of angles and energies studied. The measured cross sections have been integrated over the experimental angular range providing absolute integral cross sections for comparison with theoretical results and previously measured total cross sections.

• OSTI ID: 5336907
• Journal Information: Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:7; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUIDS
GASES
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
MOLECULAR ORBITAL METHOD
NONMETALS
OSCILLATIONS
RARE GASES
SCATTERING
SMALL ANGLE SCATTERING