Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials
Nuclear Experiment
2025-01-22 v2
Abstract
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the Th nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photons and the number of Th embedded are determined for single crystalline CaF, MgF, LiSrAlF, AlN, and amorphous SiO. For the latter two materials, no radiative decay signal was observed and an upper limit of the ratio is reported. The radiative decay wavelength was determined in LiSrAlF and CaF, reducing its uncertainty by a factor of 2.5 relative to our previous measurement. This value is in agreement with the recently reported improved values from laser excitation.
Cite
@article{arxiv.2408.12309,
title = {Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials},
author = {S. V. Pineda and P. Chhetri and S. Bara and Y. Elskens and S. Casci and A. N. Alexandrova and M. Au and M. Athanasakis-Kaklamanakis and M. Bartokos and K. Beeks and C. Bernerd and A. Claessens and K. Chrysalidis and T. E. Cocolios and J. G. Correia and H. De Witte and R. Elwell and R. Ferrer and R. Heinke and E. R. Hudson and F. Ivandikov and Yu. Kudryavtsev and U. Köster and S. Kraemer and M. Laatiaoui and R. Lica and C. Merckling and I. Morawetz and H. W. T. Morgan and D. Moritz and L. M. C. Pereira and S. Raeder and S. Rothe and F. Schaden and K. Scharl and T. Schumm and S. Stegemann and J. Terhune and P. G. Thirolf and S. M. Tunhuma and P. Van Den Bergh and P. Van Duppen and A. Vantomme and U. Wahl and Z. Yue},
journal= {arXiv preprint arXiv:2408.12309},
year = {2025}
}