Radiopure ZnMoO4 scintillating bolometers for the LUMINEU double-beta experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90027%2F15%3A00344245" target="_blank" >RIV/68407700:90027/15:00344245 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/1.4927985" target="_blank" >https://doi.org/10.1063/1.4927985</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4927985" target="_blank" >10.1063/1.4927985</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radiopure ZnMoO4 scintillating bolometers for the LUMINEU double-beta experiment

Popis výsledku v původním jazyce

The results of R&D of radiopure zinc molybdate (ZnMoO4) based scintillating bolometers for the LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) double-beta decay experiment are presented. A dedicated two-stage molybdenum purification technique (sublimation in vacuum and recrystallization from aqueous solutions) and an advanced directional solidification method (the low-thermal-gradient Czochralski technique) were utilized to produce high optical quality large mass (similar to 1 kg) ZnMoO4 crystal boules and first Mo-100 (99.5%) enriched (ZnMoO4)-Mo-100 crystal scintillator (mass of similar to 0.2 kg). Scintillating bolometers based on ZnMoO4 (similar to 0.33 kg) and (ZnMoO4)-Mo-100 (similar to 0.06 kg) scintillation elements and high purity Ge wafers were tested in the EDELWEISS set-up at the Modane Underground Laboratory (France). Long term low temperature tests demonstrate excellent detectors' performance and effectiveness of the purification and solidification procedures for the achievement of high radiopurity of the material, in particular with a bulk activity of Th-228 and Ra-226 below 4 mu Bq/kg. The adopted protocol was used to produce for the first time a large volume (ZnMoO4)-Mo-100 crystal scintillator (mass of similar to 1.4 kg, Mo-100 enrichment is 99.5%) to search for neutrinoless double-beta decay of Mo-100 in the framework of the LUMINEU project.

Název v anglickém jazyce

Radiopure ZnMoO4 scintillating bolometers for the LUMINEU double-beta experiment

Popis výsledku anglicky

The results of R&D of radiopure zinc molybdate (ZnMoO4) based scintillating bolometers for the LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) double-beta decay experiment are presented. A dedicated two-stage molybdenum purification technique (sublimation in vacuum and recrystallization from aqueous solutions) and an advanced directional solidification method (the low-thermal-gradient Czochralski technique) were utilized to produce high optical quality large mass (similar to 1 kg) ZnMoO4 crystal boules and first Mo-100 (99.5%) enriched (ZnMoO4)-Mo-100 crystal scintillator (mass of similar to 0.2 kg). Scintillating bolometers based on ZnMoO4 (similar to 0.33 kg) and (ZnMoO4)-Mo-100 (similar to 0.06 kg) scintillation elements and high purity Ge wafers were tested in the EDELWEISS set-up at the Modane Underground Laboratory (France). Long term low temperature tests demonstrate excellent detectors' performance and effectiveness of the purification and solidification procedures for the achievement of high radiopurity of the material, in particular with a bulk activity of Th-228 and Ra-226 below 4 mu Bq/kg. The adopted protocol was used to produce for the first time a large volume (ZnMoO4)-Mo-100 crystal scintillator (mass of similar to 1.4 kg, Mo-100 enrichment is 99.5%) to search for neutrinoless double-beta decay of Mo-100 in the framework of the LUMINEU project.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

—

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Low Radioactivity Techniques 2015 (LRT 2015): Proceedings of the 5th International Workshop in Low Radioactivity Techniques

ISBN

978-0-7354-1319-1

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

"040003-1"-"040003-6"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Seattle, WA

Datum konání akce

18. 3. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000371688900008