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

TL;DR

This paper reports high-resolution laser spectroscopy results at GANIL-SPIRAL2, focusing on stable isotopes of erbium and tin to benchmark the laser system and prepare for future experiments with radioactive isotopes.

Contribution

It presents the first high-resolution laser spectroscopy data at GISELE for stable erbium and tin isotopes, including new isotope-shift measurements and atomic transition benchmarks.

Findings

Benchmark of laser setup using stable isotopes

New isotope-shift data for tin transitions

Field-shift and mass-shift factors for specific transitions

Abstract

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.