Hyperfine structure in the 6/ital snh/ (/ital l/=5) Rydberg series of barium

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · J. Opt. Soc. Am. B: Opt. Phys.; (United States)

DOI:https://doi.org/10.1364/JOSAB.6.001473· OSTI ID:6030442

Vassen, W; Veldt, T v; Westra, C; Bente, E; Hogervorst, W

The hyperfine structure in the odd-parity 6/ital snh/ (9/le//ital n//le/40) Rydberg series of barium has been investigated, using a single cw ring dye laser and a beam of neutral atoms in the metastable 5/ital d//sup 2/ /sup 1//ital G//sub 4/ state. Owing to small fine-structure splitting, this hyperfine structure is dominated by the Fermi contact interaction of the 6/ital s/ electron already at /ital n/=12. The hyperfine-structure analysis results in a determination of the complete fine structure of the 6/ital snh/ series as well as in values for the singlet--triplet mixing in the 6/ital snh/ /ital J/=5 states. The 6/ital snh/ series turn out to be perturbed by levels of the 5/ital d/4/ital f/ configuration; /ital J/=4 and /ital J/=5 levels of this configuration have been observed. The Rydberg series perturbations are analyzed, using multichannel quantum-defect theory in the shifted /ital R/-matrix formalism. Far from the 5/ital d/4/ital f/ perturbers, the 6/ital snh/ configuration is almost purely /ital jj/ coupled.

• Research Organization: Faculteit Natuurkunde en Sterrenkunde, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands (NL)
• OSTI ID: 6030442
• Journal Information: J. Opt. Soc. Am. B: Opt. Phys.; (United States), Journal Name: J. Opt. Soc. Am. B: Opt. Phys.; (United States) Vol. 6:8; ISSN JOBPD
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOMIC BEAMS
BARIUM
BEAMS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HYPERFINE STRUCTURE
LASER SPECTROSCOPY
METALS
RYDBERG STATES
SPECTRA
SPECTROSCOPY
ULTRAVIOLET SPECTRA