Ionization of water by (20-150)-keV protons: Separation of direct-ionization and electron-capture processes

Journal Article · Tue Nov 30 23:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.062716· OSTI ID:20649947

Gobet, F; Eden, S; Coupier, B; Tabet, J; Farizon, B; Farizon, M; Gaillard, M J ^[1]; Carre, M ^[1]; Ouaskit, S ^[1]; Maerk, T D; Scheier, P ^[1]

---

1. Institut de Physique Nucleaire de Lyon, IN2P3-CNRS et Universite Claude Bernard Lyon 1, 43 boulevard du 11 Novembre 1918, F-69622 Villeurbanne Cedex (France)

Mass analyzed product ions have been detected in coincidence with the projectile following the ionization of water by proton impact. Measurement of the projectile charge state postcollision enables the different ionization processes to be identified: direct ionization, single electron capture, and double electron capture. A complete set of partial and total absolute cross sections is reported for the direct ionization and electron capture processes initiated by proton collisions at 20-150 keV. The cross sections for the direct ionization of H{sub 2}O by proton impact are compared with previous electron impact results [Straub et al., J. Chem. Phys. 108, 109 (1998)].

• OSTI ID: 20649947
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CHARGE STATES
CROSS SECTIONS
ELECTRON CAPTURE
ELECTRONS
HYDROGEN IONS
ION-MOLECULE COLLISIONS
IONIZATION
KEV RANGE
MASS SPECTRA
PROTONS
WATER