Ionization and charge transfer in He/sup 2+/--rare-gas collisions. II

Journal Article · Tue Sep 15 04:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.2585· OSTI ID:6266435

DuBois, R D

New measurements of absolute cross sections for multiple ionization of helium, neon, argon, and krypton by 50--500-keV/amu He/sup 2+/ impact are presented. By measuring projectile-ion--target-ion coincidences, these cross sections are obtained for the direct ionization as well as the single- and double-electron-capture channels. The present data are combined with previous measurements by the author that covered the energy range between 5 and 67 keV/amu in order to provide a broader description of He/sup 2+/ impact ionization of atomic targets. The earlier measurements were found to require reevaluation in order to correct ion detection efficiencies used in that study. An analysis of the direct-multiple-ionization cross sections demonstrates that a simple impact-parameter, independent-electron model can be used to describe these cross sections over a broad range of low to intermediate impact energies. In particular, this analysis, when applied to fully stripped ion (1 less than or equal to Z less than or equal to 8) impact on helium, yields a single universal curve in the velocity range investigated here.

• Research Organization: Pacific Northwest Laboratory, Richland, Washington 99352
• OSTI ID: 6266435
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:6; 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
CHARGE EXCHANGE
CHARGED PARTICLES
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DATA
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM IONS
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
MULTICHARGED IONS
NONMETALS
NUMERICAL DATA
RARE GASES