Photoionization of two-electron atoms via the hyperspherical artificial-channel method: Application to H[sup [minus]] and He

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.1205· OSTI ID:7270695

Abrashkevich, A G; Shapiro, M ^[1]

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1. Department of Chemical Physics, The Weizmann Institute of Science, 76100, Rehovot (Israel)

An application of the artificial-channel method with hyperspherical coordinates to the calculation of photoionization cross sections of two-electron systems is presented. The method yields bound-free'' transition amplitudes and bound-state energies of any two-electron system. It obviates the separate generation of bound- and continuum-state wave functions by calculating directly the desired amplitudes. As applications, the photodetachment cross section of the H[sup [minus]] ion and the photoionization cross section of the He atom have been calculated. The computations are compared with other theoretical calculations and with experiments. The results obtained are in excellent agreement with experimental results for all the energies considered. Of equal significance is the close agreement, attesting to the high accuracy of the method, between results obtained by using the length form for the field-matter interaction and those obtained with the acceleration form.

• OSTI ID: 7270695
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:2; 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
ATOMS
CALCULATION METHODS
CHARGED PARTICLES
CROSS SECTIONS
ELEMENTS
FLUIDS
GASES
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
IONIZATION
IONS
ISOELECTRONIC ATOMS
NONMETALS
PHOTOIONIZATION
RARE GASES