Nonlocal effects in dissociative electron attachment to H sub 2

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.5201· OSTI ID:5909958

Atems, D E; Wadehra, J M ^[1]

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1. Department of Physics and Astronomy, Wayne State University, Detroit, MI (USA)

Electron scattering by diatomic molecules involving the formation of a single resonance is treated within the configuration-interaction formalism. A technique is presented for solving the resulting nonlocal integro-differential equation for the nuclear motion in the resonant state. This technique is applied to the scattering of electrons by molecular hydrogen (and its isotopes) via the formation of {ital X} {sup 2}{Sigma}{sub {ital u}}{sup +} resonance, using a semiempirical model for the resonant state. Numerical cross sections for dissociative attachment, to H{sub 2}, of electrons with energies below 5 eV are presented and compared both with available experimental data and with those obtained using the local approximation for the complete integro-differential equation. In contrast to the local theory, the nonlocal theory predicts cross sections that exhibit discontinuities at energies at which a new vibrational channel opens up. We also give an upper bound for attachment cross sections that holds for all isotopes of molecular hydrogen for all values of the incident electron energies.

• OSTI ID: 5909958
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 42:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
CHARGED PARTICLES
COLLISIONS
CONFIGURATION INTERACTION
CROSS SECTIONS
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
IONS
ISOTOPE EFFECTS
MOLECULE COLLISIONS
NONMETALS
RESONANCE
SINGULARITY