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A large HPGe detector for the non-destructive radioassay of an ultra-low-background counting facility

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arxiv 1101.4000 v1 pith:UYJ2UCCB submitted 2011-01-20 physics.ins-det nucl-ex

A large HPGe detector for the non-destructive radioassay of an ultra-low-background counting facility

M. Fechner , C. Henson , J.Gaffiot , T. Lasserre , A. Letourneau , D. Lhuillier , G. Mention , Th. A. Mueller
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R. Qu\'eval R. Svoboda
This is my paper
classification physics.ins-det nucl-ex
keywords detectorcountingfacilityhpgelargeaccuraciesaccuracyactive
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We present the use of a low background counting facility, equipped with a p-type 80% relative efficiency HPGe detector, protected by active and passive shielding, and large enough to count a 10" photo-multiplier tube (PMT). A GEANT4 Monte-Carlo of this detector was developed and tuned to 3% accuracy. We report the U, Th, and K contents in three different types of PMTs used in current neutrino experiments, with accuracies of $\sim 10$ ppb for U and Th and of $\sim 15$ ppm for K.

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