Experimental and theoretical study of the hyperfine structure in the lower configurations in sup 45 Sc II

Journal Article · Fri May 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.6241· OSTI ID:7234932

Villemoes, P; van Leeuwen, R; Arnesen, A; Heijkenskjoeld, F; Kastberg, A; Larsson, M O ^[1]; Kotochigova, S A ^[2]

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1. Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala (Sweden)
2. State Optical Institute, 199 034 St. Petersburg (Russia)

We have measured the hyperfine structure (hfs) of 12 levels in the configurations 3{ital d}4{ital s}, 3{ital d}{sup 2}, and 3{ital d}4{ital p} in singly ionized scandium by collinear fast-ion-beam--laser spectroscopy. The hfs of the four levels in the configuration 3{ital d}4{ital s} has to our knowledge not been measured before. From these levels the ions were excited to levels in the 3{ital d}4{ital p} configuration by the frequency-doubled output of a ring dye laser with an intracavity mounted LiIO{sub 3} crystal. Levels in the 3{ital d}{sup 2} configuration were excited to levels in the 3{ital d}4{ital p} configuration with visible laser light. The resulting magnetic dipole ({ital A}) and electric quadrupole ({ital B}) hfs constants are analyzed in Sandars-Beck effective-operator formalism. The multiconfiguration Dirac-Fock method has been used to calculate the hfs constants for levels in the configurations 3{ital d}4{ital s}, 3{ital d}5{ital s}, 3{ital d}6{ital s}, 3{ital d}{sup 2}, and 3{ital d}4{ital p}. Within the framework of the configuration-interaction method, an approach is presented for the calculation of the core polarization, which uses a virtual basis set localized inside the core. For all levels, this approach gives better results compared to previously published calculations.

• OSTI ID: 7234932
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
CHARGED PARTICLES
ENERGY LEVELS
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
IONS
ISOTOPES
LASER SPECTROSCOPY
NUCLEI
ODD-EVEN NUCLEI
POLARIZATION
SCANDIUM 45
SCANDIUM ISOTOPES
SPECTROSCOPY
STABLE ISOTOPES
VIRTUAL STATES