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Multichannel photoionization of metastable He(2 [sup 3][ital S[ital e]]): A complete study of the [sup 3][ital P[ital o]] resonances between the [ital N]=2 and 3 thresholds

Journal Article · · Physical Review A; (United States)
;  [1]
  1. Departamento de Quimica, Facultad de Ciencias, C-14, Universidad Autonoma de Madrid, 28049 Madrid (Spain)
+ Show Author Affiliations

An extensive study of the photoionization of metastable He(2 [sup 3][ital S[ital e]]) between the [ital N]=2 and [ital N]=3 thresholds is presented in this paper. We have calculated the partial 1[ital s][epsilon][ital p], 2[ital s][epsilon][ital p], 2[ital p][epsilon][ital s], 2[ital p][epsilon][ital d], and total photoionization cross sections, as well as the [beta] asymmetry parameters that permit one to obtain the differential cross sections. A complete set of resonance parameters for the first twelve [sup 3][ital P[ital o]] doubly excited states is provided. In particular, the partial widths of these resonances are presented. Our results show that this photoionization process leaves preferentially the He[sup +] ion in a 2[ital s] state and that the resonance structure is much more pronounced than in photoionization from the ground state. Also, the photoelectrons are ejected preferentially in the direction of the polarization axis of the incident radiation field. Electron-correlation properties of the doubly excited states responsible for the resonant peaks observed in the spectra are discussed in detail.

OSTI ID:
6702701
Journal Information:
Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 47:3; ISSN 1050-2947; ISSN PLRAAN
Country of Publication:
United States
Language:
English

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Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY COEFFICIENTS
CATIONS
CHARGED PARTICLES
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
EMISSION
ENERGY
ENERGY LEVELS
EXCITED STATES
FANO FACTOR
FLUIDS
GASES
GROUND STATES
HELIUM
HELIUM IONS
INFORMATION
IONIZATION
IONS
METASTABLE STATES
NONMETALS
NUMERICAL DATA
PHOTOEMISSION
PHOTOIONIZATION
POLARIZATION
RARE GASES
RESONANCE
SECONDARY EMISSION
THEORETICAL DATA
THRESHOLD ENERGY
VELOCITY