Electron emission in He sup + -atom and He sup + -molecule collisions: A combined experimental and theoretical study

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.1222· OSTI ID:6590328

DuBois, R D ^[1]; Manson, S T ^[2]

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1. Pacific Northwest Laboratory, Richland, Washington 99352 (USA)
2. Department of Physics and Astronomy, Georgia State University, Atlanta, GA (USA)

An experimental and theoretical study of the electron emission, differential in emission angle and energy, is presented for He{sup +} impact on several gaseous targets. Experimentally, data at 400-, 500-, and 750-keV/amu impact on He, Ne, Ar, Kr, and H{sub 2}O are presented; theoretically, cross sections for He and Ar are calculated using the first-order Born approximation. By measuring the total electron emission, as well as electron-scattered projectile coincidences, contributions to the differential cross sections resulting from projectile ionization, from target ionization, and from simultaneous projectile-target ionization events are identified. Theoretical cross sections for each of these processes, as well as their total sum, are compared with the experimental data. From these comparisons, it is found that the present theoretical treatment does a reasonable job of describing the total projectile and target ionization cross sections, but is poor for the double-differential cross section. It also severely underestimates the simultaneous projectile-target ionization cross section.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6590328
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 42:3; 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
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
FLUIDS
GASES
HELIUM IONS
HYDROGEN COMPOUNDS
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONS
MEV RANGE
MEV RANGE 01-10
MOLECULE COLLISIONS
NONMETALS
OXYGEN COMPOUNDS
RARE GASES
SPECTRA
WATER