Complex-basis-function treatment of photoionization in the random-phase approximation

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.3146· OSTI ID:6207884

Yabushita, S; McCurdy, C W; Rescigno, T N

Complex-basis-function techniques are used to implement the equations of the random-phase approximation (RPA) in matrix form. This approach allows the direct extraction of total photoionization cross sections from a finite series of (complex) transition energies and oscillator strengths. The RPA is an effective means for including electron correlation effects on the photoionization of closed-shell atoms and molecules. The procedure demonstrated here provides a rigorous way of solving the RPA equations for continuum photoabsorption without resorting to numerical integration. The results of calculations on He and N/sub 2/ are presented. Correlation effects are found to significantly influence the threshold behavior of the N/sub 2/ photoionization cross sections.

• Research Organization: Department of Chemistry, The Ohio State University, Columbus, Ohio 43210
• OSTI ID: 6207884
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:7; 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
ATOM COLLISIONS
CALCULATION METHODS
COLLISIONS
CORRELATIONS
CROSS SECTIONS
ELECTRON CORRELATION
ELEMENTS
FLUIDS
GASES
HELIUM
IONIZATION
MATRIX ELEMENTS
MOLECULE COLLISIONS
NITROGEN
NONMETALS
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
PHOTON-MOLECULE COLLISIONS
RANDOM PHASE APPROXIMATION
RARE GASES