Dipole density function and evaluation of the oscillator strength of He

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.46.3758· OSTI ID:6997676

Tang, J Z; Watanabe, S; Matsuzawa, M ^[1]

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1. Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu-shi, Tokyo 182 (Japan)

The previously reported hyperspherical close-coupling method is extended to treat dipole transitions. In so doing, we introduce the {ital dipole} {ital density} {ital function}, which permits us to visualize various components of the dipole matrix as a function of the hyperradius and to study the convergence rate of the length and acceleration forms. In the adiabatic approximation, the acceleration form is shown to be always inferior to the length form regardless of the quality of the adiabatic wave function. We present detailed comparisons with other high-precision theoretical results for the bound-bound process He(1{ital sns})+{ital h}{nu}{r arrow}He(1{ital smp}). Excellent agreement between theory and experiment is attained for the photoionization of He above He{sup +}(1{ital s}) threshold.

• OSTI ID: 6997676
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:7; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
DIPOLES
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
ELEMENTS
FLUIDS
GASES
HELIUM
MULTIPOLES
NONMETALS
OSCILLATOR STRENGTHS
RARE GASES