Collective response and molecular effects in cluster photoionization: A one-center time-dependent calculation for BaO[sub 2]

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.3529· OSTI ID:6952961

Crljen, Z; Luberek, J; Wendin, G ^[1]; Levine, Z H ^[2]

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1. Department of Applied Physics, Chalmers University of Technology, S-41296 Goeteborg (Sweden)
2. Department of Physics, The Ohio State University, Columbus, Ohio 43210-1368 (United States)

We calculate the photoionization cross section of a BaO[sub 2] molecule in the region of the Ba 4[ital d]-[ital f] giant dipole resonance, i.e., 90--150 eV, taking into account both many-electron screening and molecular, multiple scattering effects. The potential of the oxygen ligand atoms is expanded in spherical harmonics around the central Ba atom and screening is treated within the time-dependent local-density approximation. The cross section shows prominent modulations and structure due to final-state molecular resonance effects, in good qualitative agreement with experimental results on solids.

• OSTI ID: 6952961
• Journal Information: Physical Review A; (United States), Vol. 50:4; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARIUM OXIDES
PHOTOIONIZATION
COLLECTIVE EXCITATIONS
CROSS SECTIONS
DIPOLES
LIGANDS
MANY-BODY PROBLEM
MOLECULAR CLUSTERS
RESONANCE
TIME DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
ENERGY-LEVEL TRANSITIONS
EXCITATION
IONIZATION
MULTIPOLES
OXIDES
OXYGEN COMPOUNDS
664200* - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)