Development of Mo-100-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90072%2F17%3A00344148" target="_blank" >RIV/68407700:90072/17:00344148 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-017-5343-2" target="_blank" >https://doi.org/10.1140/epjc/s10052-017-5343-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-017-5343-2" target="_blank" >10.1140/epjc/s10052-017-5343-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of Mo-100-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search

Popis výsledku v původním jazyce

This paper reports on the development of a technology involving Mo-100-enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass (similar to 1 kg), high optical quality, radiopure Mo-100-containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4 kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q-value of the double-beta transition of Mo-100 (3034 keV) is 4-6 keV FWHM. The rejection of the a-induced dominant background above 2.6 MeV is better than 8 sigma. Less than 10 mu Bq/kg activity of Th-232 (Th-228) and Ra-226 in the crystals is ensured by boule recrystallization. The potential of Mo-100-enriched scintillating bolometers to perform high sensitivity double-beta decay-searches has been demonstrated with only 10 kg x d exposure: the two neutrino double-beta decay half-life of Mo-100 has been measured with the up-to-date highest accuracy as T-1/2 = [6.90 +/- 0.15(stat.) +/- 0.37(syst.)] x 10(18) years. Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of Mo-100.

Název v anglickém jazyce

Development of Mo-100-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search

Popis výsledku anglicky

This paper reports on the development of a technology involving Mo-100-enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass (similar to 1 kg), high optical quality, radiopure Mo-100-containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4 kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q-value of the double-beta transition of Mo-100 (3034 keV) is 4-6 keV FWHM. The rejection of the a-induced dominant background above 2.6 MeV is better than 8 sigma. Less than 10 mu Bq/kg activity of Th-232 (Th-228) and Ra-226 in the crystals is ensured by boule recrystallization. The potential of Mo-100-enriched scintillating bolometers to perform high sensitivity double-beta decay-searches has been demonstrated with only 10 kg x d exposure: the two neutrino double-beta decay half-life of Mo-100 has been measured with the up-to-date highest accuracy as T-1/2 = [6.90 +/- 0.15(stat.) +/- 0.37(syst.)] x 10(18) years. Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of Mo-100.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

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Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

77

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

25

Strana od-do

1-25

Kód UT WoS článku

000416366100002

EID výsledku v databázi Scopus

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