Cross sections for ionizaton of gases by 5--4000-keV protons and for electron capture by 5--150-keV protons

Journal Article · Thu Dec 01 04:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.28.3244· OSTI ID:5310166

Rudd, M E; DuBois, R D; Toburen, L H; Ratcliffe, C A; Goffe, T V

Using the parallel-plate-capacitor method and a capacitance manometer to determine pressures, total cross sections for the production of positive and negative charges were measured for 5--4000-keV-proton impact on He, Ne, Ar, Kr, H/sub 2/, N/sub 2/, CO, O/sub 2/, CH/sub 4/, and CO/sub 2/. From these, ionization and electron-capture cross sections were obtained and fitted to semiempirical equations describing the energy dependence in terms of a few parameters. At high energies very good agreement is obtained in the comparison of the ionization cross sections to earlier proton- and electron-impact measurements and with theoretical treatments where they are available, but discrepancies exist for some targets at low energy. Above 10 keV the electron-capture cross sections are in agreement with earlier work for all the targets except CO and CH/sub 4/ for which they are (20--40)% higher.

• Research Organization: University of Nebraska, Lincoln, Nebraska 68588-0111 and Battelle Pacific Northwest Laboratories, Richland, Washington 99352
• OSTI ID: 5310166
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKANES
ATOM COLLISIONS
CAPTURE
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATIONS
CHALCOGENIDES
CHARGE DISTRIBUTION
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
METHANE
MOLECULE COLLISIONS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
RARE GASES
TIME-OF-FLIGHT METHOD