Multiconfiguration Hartree-Fock calculation of the photoionization of the Cs 7 d excited state

Journal Article · Sun Dec 31 23:00:00 EST 1989 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.174· OSTI ID:7243887

Saha, H P ^[1]

---

1. Department of Physics, University of Central Florida, Orlando, Florida 32816-0993 (US)

The numerical multiconfiguration Hartree-Fock method is used to calculate the photoionization cross section for the Cs 7{ital d} excited state. The electron correlation and the dynamical core-polarization effects, which are very important for photoionization-cross-section calculations of the cesium atom, have been taken into account in an {ital ab} {ital initio} manner through the configuration-interaction procedure. A minimum has been found in the total photoionization cross section. The calculation of the photoionization angular-distribution asymmetry parameter is proved to be an excellent test to determine the existence and location of the minimum in the cross section. The length and velocity forms of the cross section and the asymmetry parameter are found to be in excellent agreement over the entire incident photon energy range considered, suggesting that converged results may be obtained in this interval with the present approach. The results obtained are compared with the recent experimental measurements of the absolute photoionization cross section and are found to be in good agreement.

• OSTI ID: 7243887
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 41:1; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANGULAR DISTRIBUTION
ASYMMETRY
CESIUM
CROSS SECTIONS
DISTRIBUTION
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY DEPENDENCE
ENERGY LEVELS
EXCITED STATES
HARTREE-FOCK METHOD
IONIZATION
METALS
PHOTOIONIZATION