Velocity dependence of CO and CH{sub 4} electron removal and fragmentation caused by fast proton impact

Journal Article · Sat May 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:281183

Ben-Itzhak, I; Carnes, K D; Krishnamurthi, V ^[1]

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

Cross sections of the breakup channels of CO and CH{sub 4}, caused by 1-14 MeV proton impact, have been measured. The total cross sections for single to triple electron removal are in reasonable agreement with SCA calculations. The production cross sections for CO{sup +} and CH{sub 4}{sup +} ions are in good agreement with electron impact ionization at the same high velocities. Proton and electron impact are expected to by the same at high velocities. Proton and electron impact are expected to be the same at high velocities where the first Born approximation is valid. At lower velocities the proton impact cross sections are in general higher than the electron impact data. The ion-neutral breakup channels show similar trends, but ion-pair channels have a different velocity dependence. The effect of the charge sign and the projectile mass on the fragmentation of doubly ionized molecules (ion-pairs) needs further study because electron data of ion-pair production is scarce.

• OSTI ID: 281183
• Report Number(s): CONF-9305421--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON MONOXIDE
CROSS SECTIONS
HYDROGEN IONS 1 PLUS
ION-ATOM COLLISIONS
IONIZATION
METHANE
VELOCITY