[8a-N107-1~7] 2.1 Radiation physics, Material development and characteristic evaluation

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[8a-N107-7] [Invited Talk] Laser Spectroscopy of ²²⁹Th:CaF₂ Crystals toward the Realization of a Nuclear Clock

〇Sayuri Takatori¹, Kjeld Beeks², Ming Guan¹, Takahiro Hiraki¹, Georgy Kazakov², Adrian Leitner², Ira Morawetz², Takahiko Masuda¹, Ryoichiro Ogake¹, Koichi Okai¹, Thomas Riebner², Noboru Sasao¹, Fabian Schaden², Felix Schneider², Thorsten Schumm², Kotaro Shimizu¹, Tomas Sikorsky², Luca Toscani de Col², Akihiro Yoshimi¹, Koji Yoshimura¹ (1.Okayama Univ., 2.TU Wien)

Keywords:

Thorium-229,Nuclear Clock

Thorium-229 (²²⁹Th) is a laser-excitable nucleus with an extremely low first excitation level of about 8.4 eV and has potential applications as a nuclear clock. In this study, we have developed a vacuum ultraviolet (VUV) pulsed laser using four-wave mixing in Xe gas, and have performed laser excitation experiments using ²²⁹Th:CaF₂ crystal as a target. In this talk, we will report on the current status of the laser spectroscopy experiments, as well as the design and performance of the developed VUV laser and detection system.