Collapse of the 4f orbital for Xe-like ions

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.28.2811· OSTI ID:5267753

Cheng, K T; Fischer, C F

The effect of 4f orbital collapse on the spectra of Xe-like ions in the region of 4d..-->..nf,epsilonf excitations is studied with the use of a term-dependent Hartree-Fock technique. We find that the collapse of the 4f orbital is strongly term dependent, and that the appearance of intense absorption lines in the observed Ba/sup 2 +/ spectrum is due to the partial collapse of the 4f orbital in the 4d..-->..f/sup 1/P channel. We also show that after the 4f orbital is completely collapsed for high degrees of ionization along the isoelectronic sequence, the bulk of absorption oscillator strengths is concentrated at the 4d/sup 9/4f /sup 1/P level so that the only strong line in the spectrum is again the 4d..-->..4f /sup 1/P transition.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5267753
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640305* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Theory-- (-1987)
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ATOMIC IONS
ATOMS
CHARGED PARTICLES
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
FLUIDS
FUNCTIONS
GASES
HARTREE-FOCK METHOD
INNER-SHELL IONIZATION
IONIZATION
IONS
ISOELECTRONIC ATOMS
MULTICHARGED IONS
NONMETALS
OSCILLATOR STRENGTHS
P STATES
RARE GASES
SPECTRA
WAVE FUNCTIONS
XENON