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Conference Papers Year : 2016

The LUCIFER Project: Achievements and Near Future Prospects

M. Maino
  • Function : Author

Abstract

In the view of exploring the inverted hierarchy region future experiments investigating the neutrinoless double beta decay have to demand for detectors with excellent energy resolution and zero background in the energy region of interest. Cryogenic scintillating bolometers are very suitable detectors for this task since they provide particle discrimination: the simultaneous detection of the phonon and light signal allows us to identify the interacting type of particle and thus guarantees a suppression of αα-induced backgrounds, the key-issue for next-generation tonne-scale bolometric experiments. The LUCIFER project aims at running the first array of enriched scintillating Zn8282Se bolometers (total mass of about 8kg of 8282Se) with a background level as low as 10--3--3 counts/(keV kg y) in the energy region of interest. The main effort is currently focused on the finalization of the crystal growth procedure in order to achieve high quality Zn8282Se crystals both in terms of radiopurity and bolometric properties. We present results from tests of such crystals operated at mK temperatures which demonstrate the excellent background rejection capabilities of this detection approach towards a background-free demonstrator experiment. Besides, the high purity of the enriched 8282Se material allows us to establish the most stringent limits on the half-life of the double beta decay of 8282Se on excited levels.
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Dates and versions

hal-03623536 , version 1 (30-03-2022)

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J.W. Beeman, F. Bellini, P. Benetti, L. Cardani, N. Casali, et al.. The LUCIFER Project: Achievements and Near Future Prospects. 16th International Workshop on Low Temperature Detectors, Jul 2015, Grenoble, France. pp.852-858, ⟨10.1007/s10909-015-1423-6⟩. ⟨hal-03623536⟩
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