Partial and total multiphoton detachment rates for H[sup [minus]] in a perturbative [ital B]-spline-based approach

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.2508· OSTI ID:7157054

van der Hart, H W ^[1]

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1. van der Waals-Zeeman Laboratory, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam (Netherlands)

An [ital ab] [ital initio] approach has been applied to study multiphoton detachment rates for the negative hydrogen ion in the lowest nonvanishing order of perturbation theory. The approach is based on the use of [ital B] splines allowing an accurate treatment of the electronic repulsion. Total detachment rates have been determined for two- to six-photon processes as well as partial rates for detachment into the different final symmetries. It is shown that [ital B]-spline expansions can yield accurate continuum and bound-state wave functions in a very simple manner. The calculated total rates for two- and three-photon detachment are in good agreement with other perturbative calculations. For more than three-photon detachment little information has been available before now. While the total cross sections show little structure, a fair amount of structure is predicted in the partial cross sections. In the two-photon process, it is shown that the detached electrons mainly have [ital s] character. For four- and six-photon processes, the contribution from the [ital d] channel is the most important. For three- and five-photon processes [ital p] electrons dominate the electron emission spectrum. Detachment rates for [ital s] and [ital p] electrons show minima as a function of photon energy.

• OSTI ID: 7157054
• Journal Information: Physical Review A; (United States), Vol. 50:3; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HYDROGEN IONS 1 MINUS
MULTI-PHOTON PROCESSES
ENERGY DEPENDENCE
PERTURBATION THEORY
PHOTOIONIZATION
SYMMETRY
TOTAL CROSS SECTIONS
YIELDS
ANIONS
CHARGED PARTICLES
CROSS SECTIONS
HYDROGEN IONS
IONIZATION
IONS
664200* - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)