Ionization, charge exchange, and excitation in F + Ar and F + Kr collisions

Journal Article · Thu Jan 01 04:00:00 EST 1976 · Physical Review, A (General Physics)

DOI:https://doi.org/10.1103/PhysRevA.13.74· OSTI ID:4081999

Hopkins, Forrest; Brenn, Rudiger; Whittemore, Anthony R.; Cue, Nelson; Dutkiewicz, Vince; Chaturvedi, R. P.

We have measured projectile and target x-ray cross sections for F + Ar and F + Kr collisions using fluorine beams of charge states 7+, 8+, and 9+ with energies from 20 to 76 MeV. Pronounced enhancements for the Ar K and Kr L vacancy cross sections using F⁹⁺ ions compared to those for the 7+ projectile can be explained by charge exchange as described by an empirically scaled Brinkman-Kramers theory. The Ar L, Kr K, and Kr M cross sections are found to exhibit features expected for Coulomb ionization. The projectile K x- ray production for the 9+ ion is accounted for by charge exchange processes. Predictions of the first Born approximation for direct single-step excitation to bound states by the target nucleus overestimate the observed cross sections for F⁷⁺ and F⁸⁺.

• Research Organization: Department of Physics, State University of New York, Stony Brook, New York 11794
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-021192
• OSTI ID: 4081999
• Journal Information: Physical Review, A (General Physics), Journal Name: Physical Review, A (General Physics) Journal Issue: 1 Vol. 13; ISSN PLRAAN; ISSN 0556-2791
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

*FLUORINE IONS-- ION-ATOM COLLISIONS
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
BEAMS
CROSS SECTIONS
EXCITATION
IONIZATION
MEV RANGE 10-100
MULTICHARGED IONS
X RADIATION KRYPTON