Constraints on the decay of $^{180m}$Ta
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arXiv
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| Formato: | Preprint |
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2023
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| author | Arnquist, I. J. Avignone III, F. T. Barabash, A. S. Barton, C. J. Bhimani, K. H. Blalock, E. Bos, B. Busch, M. Buuck, M. Caldwell, T. S. Christofferson, C. D. Chu, P. -H. Clark, M. L. Cuesta, C. Detwiler, J. A. Efremenko, Yu. Ejiri, H. Elliott, S. R. Giovanetti, G. K. Goett, J. Green, M. P. Gruszko, J. Guinn, I. S. Guiseppe, V. E. Haufe, C. R. Henning, R. Aguilar, D. Hervas Hoppe, E. W. Hostiuc, A. Kim, I. Kouzes, R. T. Lannen V, T. E. Li, A. Lopez-Castano, J. M. Massarczyk, R. Meijer, S. J. Meijer, W. Oli, T. K. Paudel, L. S. Pettus, W. Poon, A. W. P. Radford, D. C. Reine, A. L. Rielage, K. Rouyer, A. Ruof, N. W. Schaper, D. C. Schleich, S. J. Smith-Gandy, T. A. Tedeschi, D. Varner, R. L. Vasilyev, S. Watkins, S. L. Wilkerson, J. F. Wiseman, C. Xu, W. Yu, C. -H. Alves, D. S. M. Ramani, H. |
| author_facet | Arnquist, I. J. Avignone III, F. T. Barabash, A. S. Barton, C. J. Bhimani, K. H. Blalock, E. Bos, B. Busch, M. Buuck, M. Caldwell, T. S. Christofferson, C. D. Chu, P. -H. Clark, M. L. Cuesta, C. Detwiler, J. A. Efremenko, Yu. Ejiri, H. Elliott, S. R. Giovanetti, G. K. Goett, J. Green, M. P. Gruszko, J. Guinn, I. S. Guiseppe, V. E. Haufe, C. R. Henning, R. Aguilar, D. Hervas Hoppe, E. W. Hostiuc, A. Kim, I. Kouzes, R. T. Lannen V, T. E. Li, A. Lopez-Castano, J. M. Massarczyk, R. Meijer, S. J. Meijer, W. Oli, T. K. Paudel, L. S. Pettus, W. Poon, A. W. P. Radford, D. C. Reine, A. L. Rielage, K. Rouyer, A. Ruof, N. W. Schaper, D. C. Schleich, S. J. Smith-Gandy, T. A. Tedeschi, D. Varner, R. L. Vasilyev, S. Watkins, S. L. Wilkerson, J. F. Wiseman, C. Xu, W. Yu, C. -H. Alves, D. S. M. Ramani, H. |
| contents | $^{180m}$Ta is a rare nuclear isomer whose decay has never been observed. Its remarkably long lifetime surpasses the half-lives of all other known $β$ and electron capture decays due to the large K-spin differences and small energy differences between the isomeric and lower energy states. Detecting its decay presents a significant experimental challenge but could shed light on neutrino-induced nucleosynthesis mechanisms, the nature of dark matter and K-spin violation. For this study, we repurposed the MAJORANA DEMONSTRATOR, an experimental search for the neutrinoless double-beta decay of $^{76}$Ge using an array of high-purity germanium detectors, to search for the decay of $^{180m}$Ta. More than 17 kilograms, the largest amount of tantalum metal ever used for such a search was installed within the ultra-low background detector array. In this paper we present results from the first year of Ta data taking and provide an updated limit for the $^{180m}$Ta half-life on the different decay channels. With new limits up to 1.5 x $10^{19}$ years, we improved existing limits by one to two orders of magnitude. This result is the most sensitive search for a single $β$ and electron capture decay ever achieved. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_01965 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraints on the decay of $^{180m}$Ta Arnquist, I. J. Avignone III, F. T. Barabash, A. S. Barton, C. J. Bhimani, K. H. Blalock, E. Bos, B. Busch, M. Buuck, M. Caldwell, T. S. Christofferson, C. D. Chu, P. -H. Clark, M. L. Cuesta, C. Detwiler, J. A. Efremenko, Yu. Ejiri, H. Elliott, S. R. Giovanetti, G. K. Goett, J. Green, M. P. Gruszko, J. Guinn, I. S. Guiseppe, V. E. Haufe, C. R. Henning, R. Aguilar, D. Hervas Hoppe, E. W. Hostiuc, A. Kim, I. Kouzes, R. T. Lannen V, T. E. Li, A. Lopez-Castano, J. M. Massarczyk, R. Meijer, S. J. Meijer, W. Oli, T. K. Paudel, L. S. Pettus, W. Poon, A. W. P. Radford, D. C. Reine, A. L. Rielage, K. Rouyer, A. Ruof, N. W. Schaper, D. C. Schleich, S. J. Smith-Gandy, T. A. Tedeschi, D. Varner, R. L. Vasilyev, S. Watkins, S. L. Wilkerson, J. F. Wiseman, C. Xu, W. Yu, C. -H. Alves, D. S. M. Ramani, H. Nuclear Experiment High Energy Physics - Experiment $^{180m}$Ta is a rare nuclear isomer whose decay has never been observed. Its remarkably long lifetime surpasses the half-lives of all other known $β$ and electron capture decays due to the large K-spin differences and small energy differences between the isomeric and lower energy states. Detecting its decay presents a significant experimental challenge but could shed light on neutrino-induced nucleosynthesis mechanisms, the nature of dark matter and K-spin violation. For this study, we repurposed the MAJORANA DEMONSTRATOR, an experimental search for the neutrinoless double-beta decay of $^{76}$Ge using an array of high-purity germanium detectors, to search for the decay of $^{180m}$Ta. More than 17 kilograms, the largest amount of tantalum metal ever used for such a search was installed within the ultra-low background detector array. In this paper we present results from the first year of Ta data taking and provide an updated limit for the $^{180m}$Ta half-life on the different decay channels. With new limits up to 1.5 x $10^{19}$ years, we improved existing limits by one to two orders of magnitude. This result is the most sensitive search for a single $β$ and electron capture decay ever achieved. |
| title | Constraints on the decay of $^{180m}$Ta |
| topic | Nuclear Experiment High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2306.01965 |