Laser excitation of the $^{229}$Th nuclear isomeric transition in a solid-state host
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arXiv
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| Format: | Preprint |
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2024
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| author | Elwell, R. Schneider, Christian Jeet, Justin Terhune, J. E. S. Morgan, H. W. T. Alexandrova, A. N. Tan, H. B. Tran Derevianko, Andrei Hudson, Eric R. |
| author_facet | Elwell, R. Schneider, Christian Jeet, Justin Terhune, J. E. S. Morgan, H. W. T. Alexandrova, A. N. Tan, H. B. Tran Derevianko, Andrei Hudson, Eric R. |
| contents | LiSrAlF$_6$ crystals doped with $^{229}$Th are used in a laser-based search for the nuclear isomeric transition. Two spectroscopic features near the nuclear transition energy are observed. The first is a broad excitation feature that produces red-shifted fluorescence that decays with a timescale of a few seconds. The second is a narrow, laser-linewidth-limited spectral feature at $148.38219(4)_{\textrm{stat}}(20)_{\textrm{sys}}$ nm ($2020407.3(5)_{\textrm{stat}}(30)_{\textrm{sys}}$ GHz) that decays with a lifetime of $568(13)_{\textrm{stat}}(20)_{\textrm{sys}}$ s. This feature is assigned to the excitation of the $^{229}$Th nuclear isomeric state, whose energy is found to be $8.355733(2)_{\textrm{stat}}(10)_{\textrm{sys}}$ eV in $^{229}$Th:\thor:LiSrAlF$_6$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_12311 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Laser excitation of the $^{229}$Th nuclear isomeric transition in a solid-state host Elwell, R. Schneider, Christian Jeet, Justin Terhune, J. E. S. Morgan, H. W. T. Alexandrova, A. N. Tan, H. B. Tran Derevianko, Andrei Hudson, Eric R. Atomic Physics Nuclear Experiment LiSrAlF$_6$ crystals doped with $^{229}$Th are used in a laser-based search for the nuclear isomeric transition. Two spectroscopic features near the nuclear transition energy are observed. The first is a broad excitation feature that produces red-shifted fluorescence that decays with a timescale of a few seconds. The second is a narrow, laser-linewidth-limited spectral feature at $148.38219(4)_{\textrm{stat}}(20)_{\textrm{sys}}$ nm ($2020407.3(5)_{\textrm{stat}}(30)_{\textrm{sys}}$ GHz) that decays with a lifetime of $568(13)_{\textrm{stat}}(20)_{\textrm{sys}}$ s. This feature is assigned to the excitation of the $^{229}$Th nuclear isomeric state, whose energy is found to be $8.355733(2)_{\textrm{stat}}(10)_{\textrm{sys}}$ eV in $^{229}$Th:\thor:LiSrAlF$_6$. |
| title | Laser excitation of the $^{229}$Th nuclear isomeric transition in a solid-state host |
| topic | Atomic Physics Nuclear Experiment |
| url | https://arxiv.org/abs/2404.12311 |