New Results About the Revolutionary Bolometer Assembly of BINGO

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

New Results About the Revolutionary Bolometer Assembly of BINGO

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

New Results About the Revolutionary Bolometer Assembly of BINGO

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

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

ISBN

978-0-7354-5106-3

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

4

Strana od-do

"020001-1"-"020001-4"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Praha

Datum konání akce

13. 6. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001598466300015