4.3 Article

High-resolution laser system for the S3-Low Energy Branch

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ELSEVIER
DOI: 10.1016/j.nimb.2022.12.012

Keywords

Resonance ionization laser spectroscopy; Nuclear ground state properties; Isotope shift; Hyperfine structure

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In this paper, the first high-resolution laser spectroscopy results obtained at the GISELE laser laboratory of the GANIL-SPIRAL2 facility are presented for the first experiments with the S3-Low Energy Branch. Neutron-deficient radioactive isotopes of erbium and tin are studied, and the measured isotope-shift and hyperfine structure data for stable isotopes of these elements are presented. The laser setup is benchmarked using the atomic transitions of 4f126s2 3H6-* 4f12(3H)6s6p J = 5 (415 nm) for erbium isotopes and 5s25p2(3P0)-* 5s25p6s(3P1) (286.4 nm) for tin isotopes. Additionally, new isotope-shift data and corresponding field-shift F812 and mass-shift M812 factors are obtained for the 5s25p6s(3P1)-* 5s25p6p(3P2) (811.6 nm) atomic transition of tin isotopes.
In this paper we present the first high-resolution laser spectroscopy results obtained at the GISELE laser laboratory of the GANIL-SPIRAL2 facility, in preparation for the first experiments with the S3-Low Energy Branch. Studies of neutron-deficient radioactive isotopes of erbium and tin represent the first physics cases to be studied at S3. The measured isotope-shift and hyperfine structure data are presented for stable isotopes of these elements. The erbium isotopes were studied using the 4f126s2 3H6-* 4f12(3H)6s6p J = 5 atomic transition (415 nm) and the tin isotopes were studied by the 5s25p2(3P0)-* 5s25p6s(3P1) atomic transition (286.4 nm), and are used as a benchmark of the laser setup. Additionally, the tin isotopes were studied by the 5s25p6s(3P1)-* 5s25p6p(3P2) atomic transition (811.6 nm), for which new isotope-shift data was obtained and the corresponding field-shift F812 and mass-shift M812 factors are presented.

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