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25 April 2024

» arxiv » 1702.7176

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The BiPo-3 detector for the measurement of ultra low natural radioactivities of thin materials
A.S. Barabash ; A. Basharina-Freshville ; E. Birdsall ; S. Blondel ; S. Blot ; M. Bongrand ; D. Boursette ; V. Brudanin ; J. Busto ; A.J. Caffrey ; S. Calvez ; M. Cascella ; S. Cebrián ; C. Cerna ; J.P Cesar ; E. Chauveau ; A. Chopra ; T. Dafní ; S.De Capua ; D. Duchesneau ; D. Durand ; V. Egorov ; G. Eurin ; J.J. Evans ; L. Fajt ; D. Filosofov ; R. Flack ; X. Garrido ; H. Gómez ; B. Guillon ; P. Guzowski ; K. Holý ; R. Hodák ; A. Huber ; C. Hugon ; F.J. Iguaz ; I.G. Irastorza ; A. Jeremie ; S. Jullian ; M. Kauer ; A. Klimenko ; O. Kochetov ; S.I. Konovalov ; V. Kovalenko ; K. Lang ; Y. Lemière ; T. Le Noblet ; Z. Liptak ; X.R. Liu ; P. Loaiza ; G. Lutter ; G. Luzón ; M. Macko ; F. Mamedov ; C. Marquet ; F. Mauger ; B. Morgan ; J. Mott ; I. Nemchenok ; M. Nomachi ; F. Nova ; H. Ohsumi ; G. Oliviéro A. Ortiz de Solórzano ; R.B. Pahlka ; J. Pater ; F. Perrot ; F. Piquemal ; P. Povinec ; P. Přidal ; Y.A. Ramachers ; A. Remoto ; B. Richards ; C.L. Riddle ; E. Rukhadze ; R. Saakyan ; R. Salazar ; X. Sarazin ; Yu. Shitov ; L. Simard ; F. Šimkovic ; A. Smetana ; K. Smolek ; A. Smolnikov ; S. Söldner-Rembold ; B. Soulé ; I. Štekl ; J. Thomas ; V. Timkin ; S. Torre ; Vl.I. Tretyak ; V.I. Tretyak ; V.I. Umatov ; C. Vilela ; V. Vorobel ; D. Waters ; A. Žukauskas ;
Date:	23 Feb 2017
Abstract:	The BiPo-3 detector, running in the Canfranc Underground Laboratory (Laboratorio Subterr’aneo de Canfranc, LSC, Spain) since 2013, is a low-radioactivity detector dedicated to measuring ultra low natural radionuclide contaminations of $^{208}$Tl ($^{232}$Th chain) and $^{214}$Bi ($^{238}$U chain) in thin materials. The total sensitive surface area of the detector is 3.6 m$^2$. The detector has been developed to measure radiopurity of the selenium double $eta$-decay source foils of the SuperNEMO experiment. In this paper the design and performance of the detector, and results of the background measurements in $^{208}$Tl and $^{214}$Bi, are presented, and validation of the BiPo-3 measurement with a calibrated aluminium foil is discussed. Results of the $^{208}$Tl and $^{214}$Bi activity measurements of the first enriched $^{82}$Se foils of the double $eta$-decay SuperNEMO experiment are reported. The sensitivity of the BiPo-3 detector for the measurement of the SuperNEMO $^{82}$Se foils is $mathcal{A}$($^{208}$Tl) $<2$ $mu$Bq/kg (90\% C.L.) and $mathcal{A}$($^{214}$Bi) $<140$ $mu$Bq/kg (90\% C.L.) after 6 months of measurement.
Source:	arXiv, 1702.7176
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