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Title

Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils

AuthorsSuperNEMO Collaboration; Argyriades, J.; Arnold, R.; Cárcel, Sara ; Díaz Medina, José ; Monrabal, Francesc ; Serra, Luis ; Yahlali, Nadia
Issue Date1-Oct-2010
PublisherElsevier
CitationNuclear Instruments and Methods in Physics Research - Section A 622 (1): 120-128 (2010)
AbstractThe development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in (TI)-T-208 and Bi-214 for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 m(2) of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in (TI)-T-208. After more than one year of background measurement, a surface activity of the scintillators of A((TI)-T-208) = 1.5 μBq/m(2) is reported here. Given this level of background, a larger BiPo detector having 12 m(2) of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of A((TI)-T-208) <2 μBq/kg (90% CL.) with a six month measurement.
Publisher version (URL)http://dx.doi.org/10.1016/j.nima.2010.07.037
URIhttp://hdl.handle.net/10261/42735
DOI10.1016/j.nima.2010.07.037
ISSN0168-9002
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