Autoionization studies of the 1[ital s]2[ital s]2[ital p] [sup 4][ital P][sub 5/2] levels in He[sup [minus]], Li I, and Be II

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.47.3718· OSTI ID:6642965

Miecznik, G; Brage, T; Froese Fischer, C ^[1]

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1. Department of Physics, University of Lund, Soelvegatan 14, S-22 362 Lund (Sweden)

Autoionization rates of the 1[ital s]2[ital s]2[ital p] [sup 4][ital P][sub 5/2] level are computed for He[sup [minus]], Li I, and Be II, using the golden-rule formalism in the multiconfiguration Hartree-Fock approximation. The main objective is to clarify ambiguities concerning the metastable [sup 4][ital P][sub 5/2] component in He[sup [minus]], whose lifetimes differ significantly in various works. The present calculations reveal a much shorter lifetime, 345 [mu]s, than predicted in earlier theoretical works. Our result for He[sup [minus]] is in perfect agreement with recent measurements, and for Li I and Be II we agree well with other theoretical predictions.

• OSTI ID: 6642965
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 47:5; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
ATOMS
AUTOIONIZATION
BERYLLIUM IONS
CALCULATION METHODS
CHARGED PARTICLES
CORRELATIONS
ELECTRON CORRELATION
ENERGY LEVELS
EXCITED STATES
HARTREE-FOCK METHOD
HELIUM IONS
IONIZATION
IONS
ISOELECTRONIC ATOMS
LIFETIME
LITHIUM IONS
METASTABLE STATES