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Bound-State Beta Decay of $\mathbf{\mathrm{^{205}{Tl}^{81+}}}$ Ions and the LOREX Project

Fuente: arXiv

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Autori principali:	Sidhu, R. S., Leckenby, G., Chen, R. J., Mancino, R., Litvinov, Yu. A., Martínez-Pinedo, G., Amthauer, G., Bai, M., Blaum, K., Boev, B., Bosch, F., Brandau, C., Cvetković, V., Dickel, T., Dillmann, I., Dmytriiev, D., Faestermann, T., Forstner, O., Franczak, B., Geissel, H., Gernhäuser, R., Glorius, J., Griffin, C., Gumberidze, A., Haettner, E., Hillenbrand, P. -M., Kienle, P., Korten, W., Kozhuharov, Ch., Kuzminchuk, N., Langanke, K., Litvinov, S., Menz, E., Morgenroth, T., Neff, T., Nociforo, C., Nolden, F., Pavícević, M. K., Petridis, N., Popp, U., Purushothaman, S., Reifarth, R., Sanjari, M. S., Scheidenberger, C., Spillmann, U., Steck, M., Stöhlker, Th., Tanaka, Y. K., Trassinelli, M., Trotsenko, S., Varga, L., Wang, M., Weick, H., Woods, P. J., Yamaguchi, T., Zhang, Y. H., Zhao, J., Zuber, K.
Natura:	Preprint
Pubblicazione:	2025
Soggetti:	Nuclear Experiment Solar and Stellar Astrophysics Instrumentation and Detectors
Accesso online:	Acceder al recurso
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_version_	1866913643711430656
author	Sidhu, R. S. Leckenby, G. Chen, R. J. Mancino, R. Litvinov, Yu. A. Martínez-Pinedo, G. Amthauer, G. Bai, M. Blaum, K. Boev, B. Bosch, F. Brandau, C. Cvetković, V. Dickel, T. Dillmann, I. Dmytriiev, D. Faestermann, T. Forstner, O. Franczak, B. Geissel, H. Gernhäuser, R. Glorius, J. Griffin, C. Gumberidze, A. Haettner, E. Hillenbrand, P. -M. Kienle, P. Korten, W. Kozhuharov, Ch. Kuzminchuk, N. Langanke, K. Litvinov, S. Menz, E. Morgenroth, T. Neff, T. Nociforo, C. Nolden, F. Pavícević, M. K. Petridis, N. Popp, U. Purushothaman, S. Reifarth, R. Sanjari, M. S. Scheidenberger, C. Spillmann, U. Steck, M. Stöhlker, Th. Tanaka, Y. K. Trassinelli, M. Trotsenko, S. Varga, L. Wang, M. Weick, H. Woods, P. J. Yamaguchi, T. Zhang, Y. H. Zhao, J. Zuber, K.
author_facet	Sidhu, R. S. Leckenby, G. Chen, R. J. Mancino, R. Litvinov, Yu. A. Martínez-Pinedo, G. Amthauer, G. Bai, M. Blaum, K. Boev, B. Bosch, F. Brandau, C. Cvetković, V. Dickel, T. Dillmann, I. Dmytriiev, D. Faestermann, T. Forstner, O. Franczak, B. Geissel, H. Gernhäuser, R. Glorius, J. Griffin, C. Gumberidze, A. Haettner, E. Hillenbrand, P. -M. Kienle, P. Korten, W. Kozhuharov, Ch. Kuzminchuk, N. Langanke, K. Litvinov, S. Menz, E. Morgenroth, T. Neff, T. Nociforo, C. Nolden, F. Pavícević, M. K. Petridis, N. Popp, U. Purushothaman, S. Reifarth, R. Sanjari, M. S. Scheidenberger, C. Spillmann, U. Steck, M. Stöhlker, Th. Tanaka, Y. K. Trassinelli, M. Trotsenko, S. Varga, L. Wang, M. Weick, H. Woods, P. J. Yamaguchi, T. Zhang, Y. H. Zhao, J. Zuber, K.
contents	Stable $^{205}$Tl ions have the lowest known energy threshold for capturing electron neutrinos ($ν_e$) of ${ E}_{ν_e}\ge50.6$\,keV. The Lorandite Experiment (LOREX), proposed in the 1980s, aims at obtaining the longtime averaged solar neutrino flux by utilizing natural deposits of Tl-bearing lorandite ores. To determine the $ν_e$ capture cross section, it is required to know the strength of the weak transition connecting the ground state of $^{205}$Tl and the 2.3 keV first excited state in $^{205}$Pb. The only way to experimentally address this transition is to measure the bound-state beta decay ($β_{b}$) of fully ionized $\mathrm{^{205}Tl^{81+}}$ ions. After three decades of meticulous preparation, the half-life of the $β_{b}$ decay of $\mathrm{^{205}Tl^{81+}}$ has been measured to be $291_{-27}^{+33}$ days using the Experimental Storage Ring (ESR) at GSI, Darmstadt. The longer measured half-life compared to theoretical estimates reduces the expected signal-to-noise ratio in the LOREX, thus challenging its feasibility.
format	Preprint
id	arxiv_https___arxiv_org_abs_2501_06029
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Bound-State Beta Decay of $\mathbf{\mathrm{^{205}{Tl}^{81+}}}$ Ions and the LOREX Project Sidhu, R. S. Leckenby, G. Chen, R. J. Mancino, R. Litvinov, Yu. A. Martínez-Pinedo, G. Amthauer, G. Bai, M. Blaum, K. Boev, B. Bosch, F. Brandau, C. Cvetković, V. Dickel, T. Dillmann, I. Dmytriiev, D. Faestermann, T. Forstner, O. Franczak, B. Geissel, H. Gernhäuser, R. Glorius, J. Griffin, C. Gumberidze, A. Haettner, E. Hillenbrand, P. -M. Kienle, P. Korten, W. Kozhuharov, Ch. Kuzminchuk, N. Langanke, K. Litvinov, S. Menz, E. Morgenroth, T. Neff, T. Nociforo, C. Nolden, F. Pavícević, M. K. Petridis, N. Popp, U. Purushothaman, S. Reifarth, R. Sanjari, M. S. Scheidenberger, C. Spillmann, U. Steck, M. Stöhlker, Th. Tanaka, Y. K. Trassinelli, M. Trotsenko, S. Varga, L. Wang, M. Weick, H. Woods, P. J. Yamaguchi, T. Zhang, Y. H. Zhao, J. Zuber, K. Nuclear Experiment Solar and Stellar Astrophysics Instrumentation and Detectors Stable $^{205}$Tl ions have the lowest known energy threshold for capturing electron neutrinos ($ν_e$) of ${ E}_{ν_e}\ge50.6$\,keV. The Lorandite Experiment (LOREX), proposed in the 1980s, aims at obtaining the longtime averaged solar neutrino flux by utilizing natural deposits of Tl-bearing lorandite ores. To determine the $ν_e$ capture cross section, it is required to know the strength of the weak transition connecting the ground state of $^{205}$Tl and the 2.3 keV first excited state in $^{205}$Pb. The only way to experimentally address this transition is to measure the bound-state beta decay ($β_{b}$) of fully ionized $\mathrm{^{205}Tl^{81+}}$ ions. After three decades of meticulous preparation, the half-life of the $β_{b}$ decay of $\mathrm{^{205}Tl^{81+}}$ has been measured to be $291_{-27}^{+33}$ days using the Experimental Storage Ring (ESR) at GSI, Darmstadt. The longer measured half-life compared to theoretical estimates reduces the expected signal-to-noise ratio in the LOREX, thus challenging its feasibility.
title	Bound-State Beta Decay of $\mathbf{\mathrm{^{205}{Tl}^{81+}}}$ Ions and the LOREX Project
topic	Nuclear Experiment Solar and Stellar Astrophysics Instrumentation and Detectors
url	https://arxiv.org/abs/2501.06029