Photoelectron studies of the 4f and 6s subshells in atomic ytterbium
The dynamic properties of the 4f subshell in atomic ytterbium were studied experimentally with the aid of synchrotron radiation and theoretically in the relativistic random-phase approximation (RRPA). Satisfactory agreement between experiment and theory was obtained for the US parameter, the R(4f/sub 7/2//4f/sub 5/2/) branching ratio and the relative partial cross sections between 17.5 and 100 eV. This indicates that 4f photoionization is described well in the RRPA model. The properties of the 6s subshell were measured between 17.5 and 50 eV. In the resonance region 5p 5d the population of the three main exit channels 6s, 4f/sub 7/2/, and 4f/sub 5/2/ were recorded in detail between 24 and 31 eV using the constant-ionic-state technique. For the approximately 15 resonance states similar populations of all channels were found. The 5p resonance structure was also calculated using a limited number of interacting channels in the multichannel quantum-defect theory.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6033852
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 33:2; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
METALS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
RANDOM PHASE APPROXIMATION
RARE EARTHS
RELATIVISTIC RANGE
RESONANCE
SPECTROSCOPY
SYNCHROTRON RADIATION
YTTERBIUM