A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90107%2F21%3A00357722" target="_blank" >RIV/68407700:90107/21:00357722 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1748-0221/16/02/P02037" target="_blank" >https://doi.org/10.1088/1748-0221/16/02/P02037</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/16/02/P02037" target="_blank" >10.1088/1748-0221/16/02/P02037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility

Popis výsledku v původním jazyce

A scintillating bolometer based on a large cubic (Li2MoO4)-Mo-100 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0 nu 2 beta experiment CUPID. The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The (Li2MoO4)-Mo-100 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV gamma line. The detection of scintillation light for each event triggered by the (Li2MoO4)-Mo-100 bolometer allowed for a full separation (similar to 8 sigma) between gamma(beta) and alpha events above 2 MeV. The (Li2MoO4)-Mo-100 crystal also shows a high internal radiopurity with Th-228 and Ra-226 activities of less than 3 and 8 mu Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic (Li2MoO4)-Mo-100 scintillating bolometers for high-sensitivity searches for the Mo-100 0 nu 2 beta decay in CROSS and CUPID projects.

Název v anglickém jazyce

A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility

Popis výsledku anglicky

A scintillating bolometer based on a large cubic (Li2MoO4)-Mo-100 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0 nu 2 beta experiment CUPID. The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The (Li2MoO4)-Mo-100 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV gamma line. The detection of scintillation light for each event triggered by the (Li2MoO4)-Mo-100 bolometer allowed for a full separation (similar to 8 sigma) between gamma(beta) and alpha events above 2 MeV. The (Li2MoO4)-Mo-100 crystal also shows a high internal radiopurity with Th-228 and Ra-226 activities of less than 3 and 8 mu Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic (Li2MoO4)-Mo-100 scintillating bolometers for high-sensitivity searches for the Mo-100 0 nu 2 beta decay in CROSS and CUPID projects.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

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Návaznosti

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Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

1748-0221

Svazek periodika

16

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

19

Strana od-do

1-19

Kód UT WoS článku

000625188800033

EID výsledku v databázi Scopus

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