Oct 3 – 7, 2022
Science Culture Center, IBS
Asia/Seoul timezone

Development of Ti:sa laser ion sources for S3-LEB at SPIRAL2-GANIL

Oct 3, 2022, 2:30 PM
S236 (Science Culture Center, IBS)


Science Culture Center, IBS

55 EXPO-ro, Yuseong-gu, Daejeon
Oral Session Session 3


Jekabs Romans (KU Leuven)


At GANIL-SPIRAL2 and LPC Caen the Super Separator Spectrometer-Low Energy Branch (S$^3$-LEB) [1] project is under development to study exotic nuclei by In-Gas Laser Ionization Spectroscopy (IGLIS) to extract ground-state properties, such as nuclear mean-square charge radii $δ$, magnetic dipole $μ$ and electrical quadrupole $Q$ moments, and nuclear spins $I$. The nuclides of interest will enter a gas cell where thermalization and neutralization will take place under a constant gas flow. A supersonic gas jet will be created by a de Laval nozzle with a high Mach number $M$ [2], resulting in a collimated low-temperature and low-density environment, where IGLIS will be subsequently performed. The in-gas-jet laser spectroscopy method will result in higher spectral resolution without loss in the efficiency in comparison to the in-gas-cell spectroscopy studies [3].

A crucial aspect of the S$^3$-LEB setup is the laser system, which has been extensively developed at GISELE offline laser laboratory for the purpose of performing mid- to high-resolution spectroscopy [4]. Having multiple laser systems with different resolving powers is necessary for performing measurements either in-gas-cell or in-gas-jet environments. In order to resolve hyperfine structures and extract nuclear properties of interest, one requires wide scanning range, narrow spectral linewidths, adequate temporal and spatial laser overlap and reliable recording of the measurement parameters. The progressive development of the titanium:sapphire laser systems in our laboratory has led to successful measurements of a few elements of interest for the day-1 experimental program like erbium, tin and palladium. This development work and latest laser-spectroscopy results will be presented.

[1] F. Déchery et al, Nucl. Instrum. Meth. B 376, 125 (2016). doi: 10.1016/j.nimb.2016.02.036
[2] R. Ferrer et al. Phys. Rev. Res. 3, 043041 (2021). doi:10.1103/PhysRevResearch.3.043041.
[3] R. Ferrer et al. Nat. Commun. 8, 14520 (2017). doi: 10.1038/ncomms14520
[4] J.Romans et al., Atoms 10(1), 21 (2022), doi: 10.3390/atoms10010021

Primary author

Jekabs Romans (KU Leuven)


Alejandro Ortiz-Cortes (GANIL) Anjali Ajayakumar (GANIL/CNRS) Antoine de Roubin (KU LEUVEN) Arno Claessens (KU LEUVEN) Dominik Studer (Institute of Physics, Johannes Gutenberg University Mainz) Herve Savajols (GANIL) Iain Moore (JYU FINLAND) Klaus Wendt (JGU MAINZ) Lucia Caceres (GANIL/CNRS) Nathalie Lecesne (GANIL/CNRS) Pierre DELAHAYE (GANIL) Piet Van Duppen (KU Leuven - Instituut voor Kern- en Stralingsfysica) Rafael Ferrer (KU LEUVEN) Renan Leroy (GANIL) Ruben de Groote (KU LEUVEN) Sarina Geldhof (GANIL/CNRS) Sebastian Raeder (GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt, Helmholtz Institute Mainz) Serge Franchoo (IJC lab) Simon Sels (KU LEUVEN) Vladimir Manea (IJC lab) Wenling Dong (IJC lab) Xavier Flechard (LPC ) Yazeed Balasmeh (University of Caen)

Presentation materials