New Results About the Revolutionary Bolometer Assembly of BINGO

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90263%2F25%3A00390796" target="_blank" >RIV/68407700:90263/25:00390796 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1063/5.0248547" target="_blank" >https://doi.org/10.1063/5.0248547</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0248547" target="_blank" >10.1063/5.0248547</a>

Result language

angličtina

Original language name

New Results About the Revolutionary Bolometer Assembly of BINGO

Original language description

Searching for neutrinoless double-beta decay (0ν2β) is one of the main experimental challenges of modern physics since its discovery would prove the Majorana nature of neutrinos. One experimental technique is given by cryogenic detectors named bolometers that are really promising for this purpose. The current generation tonne-scale experiment CUORE using this technology is putting the best limit on130Te 0ν2β half-life with TeO2 crystals but its sensitivity is limited by its background. Therefore, it will be followed by the next generation experiment CUPID (CUORE Upgrade with Particle IDentification) that will study100Mo embedded inside Li2MoO4 crystals in order to reduce the γ background. It will also read the scintillation light produced by Li2MoO4 by adding another Ge bolometer acting as a light detector next to the main absorber to reject the α background. Thanks to that, CUPID will reach a sensitivity 2 orders of magnitude higher than CUORE. However, in the case where this is not enough to detect 0ν2β, BINGO (Bi-Isotope Next Generation 0ν2β Observatory) is preparing the next-next generation of bolometric experiments. To improve the 0ν2β discovery sensitivity, the goal is to reduce drastically the number of background events in the region of interest and to combine the use of the two previously cited isotopes:130Te and100Mo. To achieve this goal, BINGO is proposing to implement an active cryogenic veto to suppress the external γ background, to use Neganov-Trofimov-Luke effect to increase light detector sensitivity and to use a revolutionary detector assembly to reduce the total surface radioactivity contribution. In this article, we will focus on the latter and present the latest results obtained with two 45x45x45 mm3 Li2MoO4 crystals. This is the first time that such a way to assemble bolometers of this size is tested.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

—

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Workshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX´22)

ISBN

978-0-7354-5106-3

ISSN

0094-243X

e-ISSN

1551-7616

Number of pages

4

Pages from-to

"020001-1"-"020001-4"

Publisher name

AIP Conference Proceedings

Place of publication

New York

Event location

Praha

Event date

Jun 13, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001598466300015