Calculation of helium photoionization with excitation including angular distribution and resonance structure

Journal Article · Mon May 15 04:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.5111· OSTI ID:6320984

Salomonson, S; Carter, S L; Kelly, H P

A nine-channel coupled-equation calculation for photoionization of the 1s/sup 2/ ground state of He is performed within the framework of many-body perturbation theory. Partial cross sections for leaving the ion in 1s, 2s, 2p, 3s, 3p, and 3d levels are obtained together with the angular asymmetry parameter for leaving the ion in n = 2 states. The resonance structure in the 1s, 2s, and 2p cross sections and in the n = 2 angular asymmetry parameter due to doubly excited autoionizing states below the n = 3 threshold is calculated. Also, parameters describing the resonances in the 1s cross section below the n = 2 threshold are obtained.

• Research Organization: Department of Physics, University of Virginia, Charlottesville, Virginia 22901
• OSTI ID: 6320984
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:10; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
CROSS SECTIONS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
GROUND STATES
HELIUM
IONIZATION
NONMETALS
PARTIAL WAVES
PERTURBATION THEORY
PHOTOIONIZATION
RARE GASES
SYMMETRY