A method to detect the VUV photons from cooled ${}^{229}$Th:CaF${}_2$ crystals

Ming Guan, Michael Bartokos, Kjeld Beeks +13

Thorium-229, with its exceptionally low-energy nuclear excited state, is a key candidate for developing nuclear clocks. ${}^{229}$Th-doped CaF${}_2$ crystals, benefiting from calcium f…