Differential cross sections for multiple ionization of Ne and Ar in collisions with fast protons

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.150· OSTI ID:7103431

Kamber, E Y; Cocke, C L; Cheng, S; Varghese, S L ^[1]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (US)

Differential cross sections for single and multiple ionization of Ne and Ar by protons have been measured at impact energies of 3 and 6 MeV, and at proton scattering angles between 0.1 and 0.9 mrad. The recoil ions formed in the collision processes were extracted from the collision region and detected in coincidence with the scattered protons. Their charge states were determined by their flight times. The experimental differential cross sections for single and multiple ionization are qualitatively explained by a simple model that takes into account the contributions of scattering from the electrons and from the target nucleus. The model indicates that ionization by hard proton-electron collisions remains the largest contributor to single and multiple ionization of both Ne and Ar for projectile scattering angles larger than 0.1 mrad. The ratio of double-to-single ionization cross sections for Ne and Ar increases with increasing proton scattering angle, suggesting an increasing importance of inner-shell ionization at small impact parameters.

• OSTI ID: 7103431
• Journal Information: Physical Review, A (General Physics); (USA), Vol. 41:1; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ION-ATOM COLLISIONS
HYDROGEN IONS 1 PLUS
NEON
CHARGE STATES
CORRELATIONS
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
IMPACT PARAMETER
INNER-SHELL IONIZATION
IONIZATION
MEV RANGE 01-10
RECOILS
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HYDROGEN IONS
INFORMATION
ION COLLISIONS
IONS
MEV RANGE
NONMETALS
NUMERICAL DATA
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena