Radiative Decay of the \(^{229m}\)Th Nuclear Clock Isomer in Different Host Materials

Radiative Decay of the \(^{229m}\)Th Nuclear Clock Isomer in Different Host Materials

A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the \(^{229m}\)Th nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photons and the number of \(^{229m}\)Th embedded are determined f...

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Veröffentlicht in:arXiv.org 2024-08
Hauptverfasser: Pineda, S V, Chhetri, P, Bara, S, Elskens, Y, Casci, S, Alexandrova, A N, M Au, Athanasakis-Kaklamanakis, M, Bartokos, M, Beeks, K, Bernerd, C, Claessens, A, Chrysalidis, K, Cocolios, T E, Correia, J G, De Witte, H, Elwell, R, Ferrer, R, Heinke, R, Hudson, E R, Ivandikov, F, Kudryavtsev, Yu, Köster, U, Kraemer, S, Laatiaoui, M, Lica, R, Merckling, C, Morawetz, I, Morgan, H W T, Moritz, D, Pereira, L M C, Raeder, S, Rothe, S, Schaden, F, Scharl, K, Schumm, T, Stegemann, S, Terhune, J, Thirolf, P G, Tunhuma, S M, Van Den Bergh, P, P Van Duppen, Vantomme, A, Wahl, U, Yue, Z
Format: Artikel
Sprache:eng
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Amorphous materials
Decay
Isomers
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Zusammenfassung:A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the \(^{229m}\)Th nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photons and the number of \(^{229m}\)Th embedded are determined for single crystalline CaF\(_2\), MgF\(_2\), LiSrAlF\(_6\), AlN, and amorphous SiO\(_2\). 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\(_6\) and CaF\(_2\), 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.
ISSN:2331-8422