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Development of a Li2MoO4 scintillating bolometer for low background physics

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arxiv 1307.0134 v2 pith:QN2NGDOS submitted 2013-06-29 physics.ins-det hep-exnucl-ex

L. Cardani , N. Casali , S. Nagorny , L. Pattavina , G. Piperno , O.P. Barinova , J.W. Beeman , F. Bellini
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F.A. Danevich S. Di Domizio L. Gironi S.V. Kirsanova F. Orio G. Pessina S. Pirro C. Rusconi C. Tomei V.I. Tretyak M. Vignati
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classification physics.ins-dethep-exnucl-ex
keywords neutronscintillatingbolometercrystaldifferentli2moo4mubqphysics
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We present the performance of a 33 g Li2MoO4 crystal working as a scintillating bolometer. The crystal was tested for more than 400 h in a dilution refrigerator installed in the underground laboratory of Laboratori Nazionali del Gran Sasso (Italy). This compound shows promising features in the frame of neutron detection, dark matter search (solar axions) and neutrinoless double-beta decay physics. Low temperature scintillating properties were investigated by means of different alpha, beta/gamma and neutron sources, and for the first time the Light Yield for different types of interacting particle is estimated. The detector shows great ability of tagging fast neutron interactions and high intrinsic radiopurity levels (< 90 \muBq/kg for 238-U and < 110 \muBq/kg for 232-Th).

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