Speaker
Description
Laser spectroscopy for studying the ground and isomeric state properties of exotic nuclei has established itself as a versatile and powerful tool, with the capabilities of providing access to nuclear model-independent data about charge radii, electromagnetic moments and spins [1]. Part of this achievement is owed to the possibility of having narrow-bandwidth (60 MHz), high power and tunable laser sources, which allow measuring the hyperfine structure and isotope shift along isotopic chains.
The Low-Energy-Branch (LEB) joined to The Super Spectrometer Separator (S3) facility at GANIL-SPIRAL2 will enable high-resolution in-gas-jet laser spectroscopy of radioactive nuclei produced with extremely low cross sections [2-3]. The online commissioning plan for S3 (and thus S3-LEB) has been established, and the first fusion-evaporation reaction used will give the opportunity to obtain nuclear and atomic information of neutron-deficient isotopes around erbium, towards the N=82 shell closure.
As part of the preparation for the first experiments, offline tests of full Ti:sapphire laser system and required laser spectroscopic schemes are carried out at the GISELE laser laboratory on elements of interest such as dysprosium and erbium [4]. The results of these offline measurements and related technical developments will be presented in this contribution.
References
[1] X.F. Yang, et al., Prog. Part. Nucl. Phys. 129 (2023)
[2] R. Ferrer et al., Nucl. Instrum. Meth. B 317 (2013) 570–581.
[3] A. Ajayakumar, et al., Nucl. Instrum. Meth. B 539, 102 (2023)
[4] J. Romans, et al., Nucl. Instrum. Meth. B 536, 72 (2023)
