Angular distributions of the atomic scandium 3d and 4s photoelectrons in the region of the 3p{yields}3d giant resonance

A determination of the angular distribution parameter {beta} of the 3d and 4s main lines of atomic scandium in the resonance region of the 3p{yields}nd,ms excitations has been carried out using electron spectrometry in conjunction with monochromatized synchrotron radiation. These measurements reveal...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2002-12, Vol.66 (6)
Main Authors: Whitfield, S.B., Myers, T., Bjelland, M., Wehlitz, R., Jimenez-Mier, J., Olalde-Velasco, P., Krause, M.O.
Format: Article
Language:English
Subjects:
ANGULAR DISTRIBUTION
ATOMIC AND MOLECULAR PHYSICS
ELECTRONS
ENERGY LEVELS
EXCITATION
GIANT RESONANCE
MANY-BODY PROBLEM
PERTURBATION THEORY
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
SCANDIUM
SYNCHROTRON RADIATION
VARIATIONS
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Summary:A determination of the angular distribution parameter {beta} of the 3d and 4s main lines of atomic scandium in the resonance region of the 3p{yields}nd,ms excitations has been carried out using electron spectrometry in conjunction with monochromatized synchrotron radiation. These measurements reveal strong variations of {beta} throughout the entire resonance region, highlighting the complicated nature of the ionization process for this first and seemingly simple 3d transition metal. The {beta} values of the photoelectrons resulting in 4s subshell ionization deviate significantly from 2.0 in qualitative, but not quantitative, agreement with recent many-body perturbation-theory calculations.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.66.060701