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Direct Measurement of the $^{39}$Ar Half-life from 3.4 Years of Data with the DEAP-3600 Detector

Fuente: arXiv

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Hauptverfasser:	DEAP Collaboration, Adhikari, P., Ajaj, R., Alpízar-Venegas, M., Amaudruz, P. -A., Anstey, J., Auty, D. J., Batygov, M., Beltran, B., Bigentini, M. A., Bina, C. E., Bonivento, W. M., Boulay, M. G., Bueno, J. F., Cadeddu, M., Cai, B., Cárdenas-Montes, M., Cavuoti, S., Chen, Y., Choudhary, S., Cleveland, B. T., Crampton, R., Daugherty, S., DelGobbo, P., Di Stefano, P., Dolganov, G., Doria, L., Duncan, F. A., Dunford, M., Ellingwood, E., Erlandson, A., Farahani, S. S., Fatemighomi, N., Fiorillo, G., Ford, R. J., Gahan, D., Gallacher, D., Garai, A., Abia, P. García, Garg, S., Giampa, P., Giménez-Alcázar, A., Goeldi, D., Golovko, V. V., Gorel, P., Graham, K., Grobov, A., Hallin, A. L., Hamstra, M., Haskins, S., Hu, J., Hucker, J., Hugues, T., Ilyasov, A., Jigmeddorj, B., Jillings, C. J., Joy, A., Kaur, G., Kemp, A., Yazdi, M. Khoshraftar, Kuźniak, M., La Zia, F., Lai, M., Langrock, S., Lehnert, B., LePage-Bourbonnais, J., Levashko, N., Lissia, M., Luzzi, L., Machulin, I., Maru, A., Mason, J., McDonald, A. B., McElroy, T., McLaughlin, J. B., Mielnichuk, C., Mirasola, L., Moharana, A., Monroe, J., Murray, A., Ng, C., Oliviéro, G., Olszewski, M., Pal, S., Papi, D., Park, B., Perry, M., Pesudo, V., Pollmann, T. R., Rad, F., Rethmeier, C., Retière, F., García, I. Rodríguez, Roszkowski, L., Santorelli, R., Schuckman II, F. G., Seth, S., Shalamova, V., Skensved, P., Smirnova, T., Sobotkiewich, K., Sonley, T., Sosiak, J., Soukup, J., Stainforth, R., Stringer, M., Tang, J., Turcotte-Tardif, R., Vázquez-Jáuregui, E., Viel, S., Vyas, B., Walczak, M., Walding, J., Ward, M., Westerdale, S., Wormington, R., Zuñiga-Reyes, A.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Nuclear Experiment Instrumentation and Detectors
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_version_	1866909784219844608
author	DEAP Collaboration Adhikari, P. Ajaj, R. Alpízar-Venegas, M. Amaudruz, P. -A. Anstey, J. Auty, D. J. Batygov, M. Beltran, B. Bigentini, M. A. Bina, C. E. Bonivento, W. M. Boulay, M. G. Bueno, J. F. Cadeddu, M. Cai, B. Cárdenas-Montes, M. Cavuoti, S. Chen, Y. Choudhary, S. Cleveland, B. T. Crampton, R. Daugherty, S. DelGobbo, P. Di Stefano, P. Dolganov, G. Doria, L. Duncan, F. A. Dunford, M. Ellingwood, E. Erlandson, A. Farahani, S. S. Fatemighomi, N. Fiorillo, G. Ford, R. J. Gahan, D. Gallacher, D. Garai, A. Abia, P. García Garg, S. Giampa, P. Giménez-Alcázar, A. Goeldi, D. Golovko, V. V. Gorel, P. Graham, K. Grobov, A. Hallin, A. L. Hamstra, M. Haskins, S. Hu, J. Hucker, J. Hugues, T. Ilyasov, A. Jigmeddorj, B. Jillings, C. J. Joy, A. Kaur, G. Kemp, A. Yazdi, M. Khoshraftar Kuźniak, M. La Zia, F. Lai, M. Langrock, S. Lehnert, B. LePage-Bourbonnais, J. Levashko, N. Lissia, M. Luzzi, L. Machulin, I. Maru, A. Mason, J. McDonald, A. B. McElroy, T. McLaughlin, J. B. Mielnichuk, C. Mirasola, L. Moharana, A. Monroe, J. Murray, A. Ng, C. Oliviéro, G. Olszewski, M. Pal, S. Papi, D. Park, B. Perry, M. Pesudo, V. Pollmann, T. R. Rad, F. Rethmeier, C. Retière, F. García, I. Rodríguez Roszkowski, L. Santorelli, R. Schuckman II, F. G. Seth, S. Shalamova, V. Skensved, P. Smirnova, T. Sobotkiewich, K. Sonley, T. Sosiak, J. Soukup, J. Stainforth, R. Stringer, M. Tang, J. Turcotte-Tardif, R. Vázquez-Jáuregui, E. Viel, S. Vyas, B. Walczak, M. Walding, J. Ward, M. Westerdale, S. Wormington, R. Zuñiga-Reyes, A.
author_facet	DEAP Collaboration Adhikari, P. Ajaj, R. Alpízar-Venegas, M. Amaudruz, P. -A. Anstey, J. Auty, D. J. Batygov, M. Beltran, B. Bigentini, M. A. Bina, C. E. Bonivento, W. M. Boulay, M. G. Bueno, J. F. Cadeddu, M. Cai, B. Cárdenas-Montes, M. Cavuoti, S. Chen, Y. Choudhary, S. Cleveland, B. T. Crampton, R. Daugherty, S. DelGobbo, P. Di Stefano, P. Dolganov, G. Doria, L. Duncan, F. A. Dunford, M. Ellingwood, E. Erlandson, A. Farahani, S. S. Fatemighomi, N. Fiorillo, G. Ford, R. J. Gahan, D. Gallacher, D. Garai, A. Abia, P. García Garg, S. Giampa, P. Giménez-Alcázar, A. Goeldi, D. Golovko, V. V. Gorel, P. Graham, K. Grobov, A. Hallin, A. L. Hamstra, M. Haskins, S. Hu, J. Hucker, J. Hugues, T. Ilyasov, A. Jigmeddorj, B. Jillings, C. J. Joy, A. Kaur, G. Kemp, A. Yazdi, M. Khoshraftar Kuźniak, M. La Zia, F. Lai, M. Langrock, S. Lehnert, B. LePage-Bourbonnais, J. Levashko, N. Lissia, M. Luzzi, L. Machulin, I. Maru, A. Mason, J. McDonald, A. B. McElroy, T. McLaughlin, J. B. Mielnichuk, C. Mirasola, L. Moharana, A. Monroe, J. Murray, A. Ng, C. Oliviéro, G. Olszewski, M. Pal, S. Papi, D. Park, B. Perry, M. Pesudo, V. Pollmann, T. R. Rad, F. Rethmeier, C. Retière, F. García, I. Rodríguez Roszkowski, L. Santorelli, R. Schuckman II, F. G. Seth, S. Shalamova, V. Skensved, P. Smirnova, T. Sobotkiewich, K. Sonley, T. Sosiak, J. Soukup, J. Stainforth, R. Stringer, M. Tang, J. Turcotte-Tardif, R. Vázquez-Jáuregui, E. Viel, S. Vyas, B. Walczak, M. Walding, J. Ward, M. Westerdale, S. Wormington, R. Zuñiga-Reyes, A.
contents	The half-life of $^{39}$Ar is measured using the DEAP-3600 detector located 2 km underground at SNOLAB. Between 2016 and 2020, DEAP-3600 used a target mass of (3269 $\pm$ 24) kg of liquid argon distilled from the atmosphere in a direct-detection dark matter search. Such an argon mass also enables direct measurements of argon isotope properties. The decay of $^{39}$Ar in DEAP-3600 is the dominant source of triggers by two orders of magnitude, ensuring high statistics and making DEAP-3600 well-suited for measuring this isotope's half-life. Use of the pulse-shape discrimination technique in DEAP-3600 allows powerful discrimination between nuclear recoils and electron recoils, resulting in the selection of a clean sample of $^{39}$Ar decays. Observing over a period of 3.4 years, the $^{39}$Ar half-life is measured to be $(302 \pm 8_{\rm stat} \pm 6_{\rm sys})$ years. This new direct measurement suggests that the half-life of $^{39}$Ar is significantly longer than the accepted value, with potential implications for measurements using this isotope's half-life as input.
format	Preprint
id	arxiv_https___arxiv_org_abs_2501_13196
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Direct Measurement of the $^{39}$Ar Half-life from 3.4 Years of Data with the DEAP-3600 Detector DEAP Collaboration Adhikari, P. Ajaj, R. Alpízar-Venegas, M. Amaudruz, P. -A. Anstey, J. Auty, D. J. Batygov, M. Beltran, B. Bigentini, M. A. Bina, C. E. Bonivento, W. M. Boulay, M. G. Bueno, J. F. Cadeddu, M. Cai, B. Cárdenas-Montes, M. Cavuoti, S. Chen, Y. Choudhary, S. Cleveland, B. T. Crampton, R. Daugherty, S. DelGobbo, P. Di Stefano, P. Dolganov, G. Doria, L. Duncan, F. A. Dunford, M. Ellingwood, E. Erlandson, A. Farahani, S. S. Fatemighomi, N. Fiorillo, G. Ford, R. J. Gahan, D. Gallacher, D. Garai, A. Abia, P. García Garg, S. Giampa, P. Giménez-Alcázar, A. Goeldi, D. Golovko, V. V. Gorel, P. Graham, K. Grobov, A. Hallin, A. L. Hamstra, M. Haskins, S. Hu, J. Hucker, J. Hugues, T. Ilyasov, A. Jigmeddorj, B. Jillings, C. J. Joy, A. Kaur, G. Kemp, A. Yazdi, M. Khoshraftar Kuźniak, M. La Zia, F. Lai, M. Langrock, S. Lehnert, B. LePage-Bourbonnais, J. Levashko, N. Lissia, M. Luzzi, L. Machulin, I. Maru, A. Mason, J. McDonald, A. B. McElroy, T. McLaughlin, J. B. Mielnichuk, C. Mirasola, L. Moharana, A. Monroe, J. Murray, A. Ng, C. Oliviéro, G. Olszewski, M. Pal, S. Papi, D. Park, B. Perry, M. Pesudo, V. Pollmann, T. R. Rad, F. Rethmeier, C. Retière, F. García, I. Rodríguez Roszkowski, L. Santorelli, R. Schuckman II, F. G. Seth, S. Shalamova, V. Skensved, P. Smirnova, T. Sobotkiewich, K. Sonley, T. Sosiak, J. Soukup, J. Stainforth, R. Stringer, M. Tang, J. Turcotte-Tardif, R. Vázquez-Jáuregui, E. Viel, S. Vyas, B. Walczak, M. Walding, J. Ward, M. Westerdale, S. Wormington, R. Zuñiga-Reyes, A. Nuclear Experiment Instrumentation and Detectors The half-life of $^{39}$Ar is measured using the DEAP-3600 detector located 2 km underground at SNOLAB. Between 2016 and 2020, DEAP-3600 used a target mass of (3269 $\pm$ 24) kg of liquid argon distilled from the atmosphere in a direct-detection dark matter search. Such an argon mass also enables direct measurements of argon isotope properties. The decay of $^{39}$Ar in DEAP-3600 is the dominant source of triggers by two orders of magnitude, ensuring high statistics and making DEAP-3600 well-suited for measuring this isotope's half-life. Use of the pulse-shape discrimination technique in DEAP-3600 allows powerful discrimination between nuclear recoils and electron recoils, resulting in the selection of a clean sample of $^{39}$Ar decays. Observing over a period of 3.4 years, the $^{39}$Ar half-life is measured to be $(302 \pm 8_{\rm stat} \pm 6_{\rm sys})$ years. This new direct measurement suggests that the half-life of $^{39}$Ar is significantly longer than the accepted value, with potential implications for measurements using this isotope's half-life as input.
title	Direct Measurement of the $^{39}$Ar Half-life from 3.4 Years of Data with the DEAP-3600 Detector
topic	Nuclear Experiment Instrumentation and Detectors
url	https://arxiv.org/abs/2501.13196