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$_2$.
Cerenkov light identification with Si low-temperature detectors with sensitivity enhanced by the Neganov-Luke effect
Giordano, Claudia;Margesin, Benno;
2016-01-01
Abstract
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$_2$.File in questo prodotto:
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