Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EN: Neutrino Physics II
7:00 PM–9:45 PM,
Thursday, October 25, 2018
Hilton Room: Kohala 4
Chair: Javier Menendez, University of Tokyo
Abstract ID: BAPS.2018.HAW.EN.6
Abstract: EN.00006 : Development of Scintillating Bolometer for Neutrinoless Double Beta Decay of 48Ca
8:15 PM–8:30 PM
Neutrinoless double beta decay (0vDBD) search is a way to prove the Majorana nature of neutrinos and to support leptogenesis scenarios. We are developing CaF2 scintillating bolometers to search for 0vDBD of 48Ca. The scintillating bolometers measuring heat and scintillation-light signals simultaneously can achieve an excellent energy resolution and to provide a clear particle identification between beta/gamma and alpha events.
The target of the R&D setup is a 300 g CaF2(Eu) crystal. The heat signals are read by a metallic magnetic calorimeter (MMC) thermally connected to a phonon collector film that is a thin metal layer evaporated on a surface of the crystal. A light detector composed of a 2 inch Ge wafer and an MMC sensor is employed just above the crystal. An above ground experiment was carried out for simultaneous detection of heat and light signals from the crystal. The measurement was compared with a Geant4 simulation of scintillation detection with realistic geometry of the detector components. It is noted that some portion of light is absorbed on the metal phonon collector. In this presentation, we report on the latest performance of the detector setup and a future plan to search for 0vDBD of 48Ca using simultaneous phonon-scintillation detection.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EN.6
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