Electron-capture and impact-ionization cross sections for multiply charged ions colliding with helium

Journal Article · Fri Dec 01 04:00:00 EST 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.18.2464· OSTI ID:6587585

Olson, R E

The classical-trajectory Monte Carlo method has been used to calculate the single-electron capture and impact-ionization cross sections for collisions between fully stripped ions (H/sup +/ to O/sup +8/) and He at energies of 100--500 keV/amu. Except for the H/sup +/ and He/sup + +/ systems, electron capture dominates over impact ionization at the lower energies, whereas at higher energies impact ionization is the dominant mechanism for electron loss from He. The sum of the calculated electron-capture and impact-ionization cross sections is well represented by the expression sigma/sub ects+tsion/ = 3.1 x 10/sup -16/q) (52q/E)(1 - exp(-E/52q))) cm/sup 2/, where q is the charge state of the incident ion and E is expressed in units of keV/amu. The calculated cross sections are in reasonable agreement with available experimental values.

• Research Organization: Molecular Physics Laboratory, SRI International, Menlo Park, California 94025
• OSTI ID: 6587585
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMIC IONS
BERYLLIUM IONS
BORON IONS
CAPTURE
CARBON IONS
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
FLUIDS
HELIUM
HELIUM IONS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
LITHIUM IONS
MULTICHARGED IONS
NITROGEN IONS
NONMETALS
OXYGEN IONS
RARE GASES