학술논문
Precision measurement of the specific activity of $$^{39}$$ 39 Ar in atmospheric argon with the DEAP-3600 detector
Document Type
article
Author
P. Adhikari; R. Ajaj; M. Alpízar-Venegas; P.-A. Amaudruz; J. Anstey; G. R. Araujo; D. J. Auty; M. Baldwin; M. Batygov; B. Beltran; H. Benmansour; C. E. Bina; J. Bonatt; W. Bonivento; M. G. Boulay; B. Broerman; J. F. Bueno; P. M. Burghardt; A. Butcher; M. Cadeddu; B. Cai; M. Cárdenas-Montes; S. Cavuoti; M. Chen; Y. Chen; S. Choudhary; B. T. Cleveland; J. M. Corning; R. Crampton; D. Cranshaw; S. Daugherty; P. DelGobbo; K. Dering; P. Di Stefano; J. DiGioseffo; G. Dolganov; L. Doria; F. A. Duncan; M. Dunford; E. Ellingwood; A. Erlandson; S. S. Farahani; N. Fatemighomi; G. Fiorillo; S. Florian; A. Flower; R. J. Ford; R. Gagnon; D. Gallacher; P. García Abia; S. Garg; P. Giampa; A. Giménez-Alcázar; D. Goeldi; V. V. Golovko; P. Gorel; K. Graham; D. R. Grant; A. Grobov; A. L. Hallin; M. Hamstra; P. J. Harvey; S. Haskins; C. Hearns; J. Hu; J. Hucker; T. Hugues; A. Ilyasov; B. Jigmeddorj; C. J. Jillings; A. Joy; O. Kamaev; G. Kaur; A. Kemp; M. Kuźniak; F. La Zia; M. Lai; S. Langrock; B. Lehnert; A. Leonhardt; J. LePage-Bourbonnais; N. Levashko; J. Lidgard; T. Lindner; M. Lissia; J. Lock; L. Luzzi; I. Machulin; P. Majewski; A. Maru; J. Mason; A. B. McDonald; T. McElroy; T. McGinn; J. B. McLaughlin; R. Mehdiyev; C. Mielnichuk; L. Mirasola; J. Monroe; P. Nadeau; C. Nantais; C. Ng; A. J. Noble; E. O’Dwyer; G. Oliviéro; C. Ouellet; S. Pal; D. Papi; P. Pasuthip; S. J. M. Peeters; M. Perry; V. Pesudo; E. Picciau; M.-C. Piro; T. R. Pollmann; F. Rad; E. T. Rand; C. Rethmeier; F. Retière; I. Rodríguez García; L. Roszkowski; J. B. Ruhland; R. Santorelli; F. G. Schuckman II; N. Seeburn; S. Seth; V. Shalamova; K. Singhrao; P. Skensved; N. J. T. Smith; B. Smith; K. Sobotkiewich; T. Sonley; J. Sosiak; J. Soukup; R. Stainforth; C. Stone; V. Strickland; M. Stringer; B. Sur; J. Tang; E. Vázquez-Jáuregui; L. Veloce; S. Viel; B. Vyas; M. Walczak; J. Walding; M. Ward; S. Westerdale; J. Willis; A. Zuñiga-Reyes; DEAP Collaboration
Source
European Physical Journal C: Particles and Fields, Vol 83, Iss 7, Pp 1-10 (2023)
Subject
Language
English
ISSN
1434-6052
Abstract
Abstract The specific activity of the $$\beta $$ β decay of $$^{39}$$ 39 Ar in atmospheric argon is measured using the DEAP-3600 detector. DEAP-3600, located 2 km underground at SNOLAB, uses a total of (3269 ± 24) kg of liquid argon distilled from the atmosphere to search for dark matter. This detector is well-suited to measure the decay of $$^{39}$$ 39 Ar owing to its very low background levels. This is achieved in two ways: it uses low background construction materials; and it uses pulse-shape discrimination to differentiate between nuclear recoils and electron recoils. With 167 live-days of data, the measured specific activity at the time of atmospheric extraction is (0.964 ± 0.001 $$_\textrm{stat}$$ stat ± 0.024 $$_\textrm{sys}$$ sys ) Bq/kg $$_\textrm{atmAr}$$ atmAr , which is consistent with results from other experiments. A cross-check analysis using different event selection criteria and a different statistical method confirms the result.