3 papers
physics.optics2025
Continuous-wave laser source at the 148 nm nuclear transition of Th-229
Vishal Lal, Maksim V. Okhapkin, Johannes Tiedau +3
A continuous-wave laser source at 148.4 nm based on second-harmonic generation in randomly quasi-phase matched strontium tetraborate, SrB4O7, is demonstrated. It provides (1.3-0.6+…
physics.atom-ph2025
Laser spectroscopy on the hyperfine structure and isotope shift of sympathetically cooled Th ions
G. Zitzer, J. Tiedau, Ch. E. Düllmann +2
The hyperfine structure of Th ions in the nuclear ground state is investigated via laser spectroscopy of trapped Th ions that are sympathetically cooled by la…
physics.atom-ph2024
Laser-Induced Quenching of the Th-229 Nuclear Clock Isomer in Calcium Fluoride
F. Schaden, T. Riebner, I. Morawetz +11
The 10-minute radiative lifetime of the first excited Th nuclear state in ionic crystals provides narrow spectroscopic linewidths, enabling the realization of a soli…