Single capture and transfer ionization in collisions of Cl{sup 1+} projectile ions incident on helium

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:199659

Wong, K L; Wu, W; Cocke, C L ^[1]

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1. Kansas State Univ., Manhattan, KS (United States); and others

The LINAC at the J.R. Macdonald Lab has been used to measure the ratio of the cross sections for the processes of transfer ionization (TI) and single capture (SC) for 2 MeV/amu Cl{sup q+} where q = 7,9,13, and 15 projectile ions incident on a helium target. The ratio was determined using a helium gas jet target by measuring projectile-ion final charge states in coincidence with target recoil-ion final charge states. The TI/SC ratio is predicted to follow a q{sup 2} scaling dependence for bare ions within the independent electron model in the perturbative regime (P{sub i}, P{sub c} {much_lt} 1, or distant collisions) where the probability for capture approximately cancels in this ratio. However, for all the measured charge states the TI/SC ratio scales larger than q{sup 2}, which is an indication that the collisions are non-perturbative. The authors have found that the overall ratio of TI/SC can be described within the independent electron model using unitarized probabilities and screening of the projectile.

• OSTI ID: 199659
• Report Number(s): CONF-941129--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHLORINE IONS
CROSS SECTIONS
ELECTRON CAPTURE
HELIUM
ION-ATOM COLLISIONS
IONIZATION
MEV RANGE 10-100