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The BiPo-3 detector for the measurement of ultra low natural radioactivities of thin materials
- Source :
- JINST 12 (2017) P06002
- Publication Year :
- 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 $\beta$-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 $\beta$-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.<br />Comment: 37 pages, 29 figures
- Subjects :
- Physics - Instrumentation and Detectors
Subjects
Details
- Database :
- arXiv
- Journal :
- JINST 12 (2017) P06002
- Publication Type :
- Report
- Accession number :
- edsarx.1702.07176
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1748-0221/12/06/P06002