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Cerenkov light identification with Si low-temperature detectors with Neganov-Luke effect-enhanced sensitivity

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arxiv 1603.08049 v3 pith:XI5OSHRC submitted 2016-03-25 physics.ins-det nucl-ex

Cerenkov light identification with Si low-temperature detectors with Neganov-Luke effect-enhanced sensitivity

classification physics.ins-det nucl-ex
keywords lightbeenbetacryogenicdetectorsneganov-lukealphabackground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A new generation of cryogenic light detectors exploiting Neganov-Luke effect to enhance the thermal signal has been used to detect the Cherenkov light emitted by the electrons interacting in TeO$_{2}$ crystals. With this mechanism a high significance event-by-event discrimination between alpha and beta/gamma interactions at the $^{130}$Te neutrino-less double beta decay Q-value - (2527.515 $\pm$ 0.013) keV - has been demonstrated. This measurement opens the possibility of drastically reducing the background in cryogenic experiments based on TeO$_{2}$.

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