{"paper":{"title":"Direct Measurement of the $^{39}$Ar Half-life from 3.4 Years of Data with the DEAP-3600 Detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"nucl-ex","authors_text":"A.B. McDonald, A. Erlandson, A. Garai, A. Gim\\'enez-Alc\\'azar, A. Grobov, A. Ilyasov, A. Joy, A. Kemp, A.L. Hallin, A. Maru, A. Moharana, A. Murray, A. Zu\\~niga-Reyes, B. Beltran, B. Cai, B. Jigmeddorj, B. Lehnert, B. Park, B.T. Cleveland, B. Vyas, C.E. Bina, C.J. Jillings, C. Mielnichuk, C. Ng, C. Rethmeier, DEAP Collaboration: P. Adhikari, D. Gahan, D. Gallacher, D. Goeldi, D.J. Auty, D. Papi, E. Ellingwood, E. V\\'azquez-J\\'auregui, F.A. Duncan, F.G. Schuckman II, F. La Zia, F. Rad, F. Reti\\`ere, G. Dolganov, G. Fiorillo, G. Kaur, G. Olivi\\'ero, I. Machulin, I. Rodr\\'iguez Garc\\'ia, J. Anstey, J.B. McLaughlin, J.F. Bueno, J. Hu, J. Hucker, J. LePage-Bourbonnais, J. Mason, J. Monroe, J. Sosiak, J. Soukup, J. Tang, J. Walding, K. Graham, K. Sobotkiewich, L. Doria, L. Luzzi, L. Mirasola, L. Roszkowski, M.A. Bigentini, M. Alp\\'izar-Venegas, M. Batygov, M. Cadeddu, M. C\\'ardenas-Montes, M. Dunford, M.G. Boulay, M. Hamstra, M. Khoshraftar Yazdi, M. Ku\\'zniak, M. Lai, M. Lissia, M. Olszewski, M. Perry, M. Stringer, M. Walczak, M. Ward, N. Fatemighomi, N. Levashko, P.-A. Amaudruz, P. DelGobbo, P. Di Stefano, P. Garc\\'ia Abia, P. Giampa, P. Gorel, P. Skensved, R. Ajaj, R. Crampton, R.J. Ford, R. Santorelli, R. Stainforth, R. Turcotte-Tardif, R. Wormington, S. Cavuoti, S. Choudhary, S. Daugherty, S. Garg, S. Haskins, S. Langrock, S. Pal, S. Seth, S.S. Farahani, S. Viel, S. Westerdale, T. Hugues, T. McElroy, T.R. Pollmann, T. Smirnova, T. Sonley, V. Pesudo, V. Shalamova, V.V. Golovko, W.M. Bonivento, Y. Chen","submitted_at":"2025-01-22T19:57:03Z","abstract_excerpt":"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-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.13196","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.13196/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}