Multiphoton detachment of H[sup [minus]]

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.4654· OSTI ID:5798490

Laughlin, C ^[1]; Chu, S ^[2]

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1. Department of Mathematics, Nottingham University, Nottingham NG7 2RD (United Kingdom)
2. Department of Chemistry, University of Kansas, Lawrence, Kansas 66045 (United States)

Multiphoton detachment of H[sup [minus]] is considered. An accurate one-electron model, which reproduces precisely the known H[sup [minus]] detachment energy and the low-energy [ital e]-H(1[ital s]) elastic-scattering phase shifts, is developed. Generalized cross sections, based on lowest-nonvanishing-order perturbation theory, are evaluated by an accurate and efficient numerical algorithm for the solution of the associated set of inhomogeneous differential equations. Two- to eight-photon detachment cross sections are determined and compared with a recent one-electron model and two-electron [ital ab] [ital initio] calculations. It appears that the present study provides consistent results with an accuracy for higher-order ([ital n][gt]3) photon-detachment cross sections comparable to that of lower orders ([ital n]=2,3). Average detachment rates for linearly polarized light are calculated and compared with recent experimental measurements. It is found that, for higher-order photon detachment, the rates for circular polarization are small in comparison with the rates for linear polarization.

• OSTI ID: 5798490
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:6; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
CROSS SECTIONS
EVALUATION
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
IONIZATION
IONS
MULTI-PHOTON PROCESSES
PHOTOIONIZATION
POLARIZATION