Inelastic processses from vibrationally excited states in slow H{sup +}+H{sub 2} and H+H{sub 2}{sup +} collisions. II. Dissociation

Journal Article · Sat Feb 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.022708· OSTI ID:20633720

Krstic, P S ^[1]; Janev, R K ^[2]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-637 (United States)
2. Macedonian Academy of Sciences and Arts, 1000 Skopje (Macedonia, The Former Yugoslav Republic of)

We present a detailed quantum-mechanical study for dissociation of vibrationally excited molecular diatomic target, of H{sub 2}({nu}{sub i}) by proton impact and H{sub 2}{sup +}({nu}{sub i}) by hydrogen-atom impact, in the range of center-of-mass collision energies from threshold to 9.5 eV. The dominant dissociation mechanisms in this three-atomic collision system are identified and their effectiveness analyzed for different collision geometries. The cross section calculations for direct and charge-transfer dissociation are performed by solving the Schroedinger equation for the nuclear and electronic motions on the two lowest diabatic electronic surfaces of H{sub 3}{sup +}, and by using an expansion of nuclear wave function in a vibrational basis containing all discrete H{sub 2} and H{sub 2}{sup +} states and a large number of pseudostates from each of the corresponding discretized continua. The energy and angular spectra of the fragments are also calculated and analyzed.

• OSTI ID: 20633720
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM-MOLECULE COLLISIONS
ATOMS
CHARGE EXCHANGE
CROSS SECTIONS
DISSOCIATION
ENERGY TRANSFER
EV RANGE
EXCITED STATES
GEOMETRY
HYDROGEN
HYDROGEN IONS 1 PLUS
HYDROGEN IONS 2 PLUS
HYDROGEN IONS 3 PLUS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
PROTONS
QUANTUM MECHANICS
SCHROEDINGER EQUATION
WAVE FUNCTIONS