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

• DOI: 10.1016/j.nimb.2022.12.012
• Publication Date: 2023-01-11T11:48:01Z
• Authors: Jekabs Romans; Anjali Ajayakumar; Martial Authier; Frederic Boumard; Lucia Caceres; Jean-François Cam; Arno Claessens; Samuel Damoy; Pierre Delahaye; Philippe Desrues; Wenling Dong; Antoine Drouart; Patricia Duchesne; Rafael Ferrer; Xavier Fléchard; Serge Franchoo; Patrice Gangnant; Sarina Geldhof; Ruben P. de Groote; Nathalie Lecesne; Renan Leroy; Julien Lory; Franck Lutton; Vladimir Manea; Yvan Merrer; Iain Moore; Alejandro Ortiz-C...; Benoit Osmond; Julien Piot; Olivier Pochon; Sebastian Raeder; Antoine de Roubin; Hervé Savajols; Simon Sels; Dominik Studer; Emil Traykov; Juha Uusitalo; Christophe Vandamme; Marine Vandebrouck; Paul Van den Bergh; Piet Van Duppen; Klaus Wendt
• Keywords: Isotopes of tin

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 S$^3$-Low Energy Branch. Studies of neutron-deficient radioactive isotopes of erbium and tin represent the first physics cases to be studied at S$^3$. The measured isotope-shift and hyperfine structure data are presented for stable isotopes of these elements. The erbium isotopes were studied using the $4f^{12}6s^2$ $^3H_6 \rightarrow 4f^{12}(^3 H)6s6p$ $J = 5$ atomic transition (415 nm) and the tin isotopes were studied by the $5s^25p^2 (^3P_0) \rightarrow 5s^25p6s (^3P_1)$ atomic transition (286.4 nm), and are used as a benchmark of the laser setup. Additionally, the tin isotopes were studied by the $5s^25p6s (^3P_1) \rightarrow 5s^25p6p (^3P_2)$ atomic transition (811.6 nm), for which new isotope-shift data was obtained and the corresponding field-shift $F_{812}$ and mass-shift $M_{812}$ factors are presented.