English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The development of BiPo detectors is dedicated to the measurement ofextremely high radiopurity in $^{208}$Tl and $^{214}$Bi for the SuperNEMOdouble 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 UndergroundLaboratory since February, 2008. The goal of BiPo-1 is to measure the differentcomponents of the background and in particular the surface radiopurity of theplastic scintillators that make up the detector. The first phase of datacollection has been dedicated to the measurement of the radiopurity in$^{208}$Tl. After more than one year of background measurement, a surfaceactivity of the scintillators of $\mathcal{A}$($^{208}$Tl) $=$ 1.5$\mu$Bq/m$^2$ is reported here. Given this level of background, a larger BiPodetector having 12 m$^2$ of active surface area, is able to qualify theradiopurity of the SuperNEMO selenium double beta decay foils with the requiredsensitivity of $\mathcal{A}$($^{208}$Tl) $<$ 2 $\mu$Bq/kg (90% C.L.) with a sixmonth measurement.

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