An experiment to study double-beta decay (DBD) processes in 94,96Zr using two Cs2ZrCl6 (CZC) crystal scintillators (11 g and 24 g) has been performed deep underground in the DAMA/CRYS setup at LNGS. These crystals have been studied in terms of chemical purity and internal radioactive contamination, scintillation and PSD performances. Their high radiopurity was confirmed by low-background measurements over 456.5 d which resulted in a counting rate of 0.17 (kg·keV·y) −1 at the Q2β value of 96Zr. Limits on different DBD modes of 94,96Zr were set at the level T1/2 ~ 1017 − 1020 y (90% C.L.).
Leoncini, A., Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., Cerulli, R., et al. (2024). First search for neutrinoless double beta decay in 94,96Zr isotopes using Cs2ZrCl6 crystal scintillators. In Workshop on the Calculation of Double-Beta-Decay Matrix Elements: MEDEX '23. AIP Publishing [10.1063/5.0204923].
First search for neutrinoless double beta decay in 94,96Zr isotopes using Cs2ZrCl6 crystal scintillators
Leoncini, A.
;Caracciolo, V.;Merlo, V.;
2024-01-01
Abstract
An experiment to study double-beta decay (DBD) processes in 94,96Zr using two Cs2ZrCl6 (CZC) crystal scintillators (11 g and 24 g) has been performed deep underground in the DAMA/CRYS setup at LNGS. These crystals have been studied in terms of chemical purity and internal radioactive contamination, scintillation and PSD performances. Their high radiopurity was confirmed by low-background measurements over 456.5 d which resulted in a counting rate of 0.17 (kg·keV·y) −1 at the Q2β value of 96Zr. Limits on different DBD modes of 94,96Zr were set at the level T1/2 ~ 1017 − 1020 y (90% C.L.).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
