Search for the double-beta decay of Se-82 to the excited states of Kr-82 with NEMO-3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422149" target="_blank" >RIV/00216208:11320/20:10422149 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9JFXUEi5av" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9JFXUEi5av</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysa.2020.121701" target="_blank" >10.1016/j.nuclphysa.2020.121701</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for the double-beta decay of Se-82 to the excited states of Kr-82 with NEMO-3

Popis výsledku v původním jazyce

The double-beta decay of Se-82 to the 0(1)(+) excited state of Kr-82 has been studied with the NEMO-3 detector using 0.93 kg of enriched Se-82 measured for 4.75 y, corresponding to an exposure of 4.42 kg.y. A dedicated analysis to reconstruct the gamma-rays has been performed to search for events in the 2e2 gamma channel. No evidence of a 2 nu beta beta decay to the 0(1)(+) state has been observed and a limit of T-1/2(2 nu) (Se-82, 0(gs)(+) -&gt; 0(1)(+)) &gt; 1.3 x 10(21) y at 90% CL has been set. Concerning the 0 nu beta beta decay to the 0(1)(+)-state, a limit for this decay has been obtained with T-1/2(0 nu) (Se-82, 0(gs)(+) -&gt; 0(1)(+)) &gt; 2.3 x 10(22) y at 90% CL, independently from the 2 nu beta beta decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state. (C) 2020 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Search for the double-beta decay of Se-82 to the excited states of Kr-82 with NEMO-3

Popis výsledku anglicky

The double-beta decay of Se-82 to the 0(1)(+) excited state of Kr-82 has been studied with the NEMO-3 detector using 0.93 kg of enriched Se-82 measured for 4.75 y, corresponding to an exposure of 4.42 kg.y. A dedicated analysis to reconstruct the gamma-rays has been performed to search for events in the 2e2 gamma channel. No evidence of a 2 nu beta beta decay to the 0(1)(+) state has been observed and a limit of T-1/2(2 nu) (Se-82, 0(gs)(+) -&gt; 0(1)(+)) &gt; 1.3 x 10(21) y at 90% CL has been set. Concerning the 0 nu beta beta decay to the 0(1)(+)-state, a limit for this decay has been obtained with T-1/2(0 nu) (Se-82, 0(gs)(+) -&gt; 0(1)(+)) &gt; 2.3 x 10(22) y at 90% CL, independently from the 2 nu beta beta decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state. (C) 2020 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Nuclear Physics A

ISSN

0375-9474

e-ISSN

—

Svazek periodika

996

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

121701

Kód UT WoS článku

000519669400015

EID výsledku v databázi Scopus

2-s2.0-85078494158