82Se用cuid -0相I的双β衰变结果

WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19) Pub Date : 2019-10-25 DOI:10.1063/1.5130980

L. Pagnanini, O. Azzolini, J. Beeman, F. Bellini, M. Beretta, M. Biassoni, C. Brofferio, C. Bucci, S. Capelli, L. Cardani, P. Carniti, N. Casali, D. Chiesa, M. Clemenza, O. Cremonesi, A. Cruciani, I. Dafinei, S. Domizio, F. Ferroni, L. Gironi, A. Giuliani, P. Gorla, C. Gotti, G. Keppel, S. Nagorny, M. Nastasi, S. Nisi, C. Nones, D. Orlandi, M. Pallavicini, L. Pattavina, M. Pavan, G. Pessina, V. Pettinacci, S. Pirrò, S. Pozzi, E. Previtali, A. Puiu, C. Rusconi, K. Schäffner, C. Tomei, M. Vignati, A. Zolotarova

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引用次数: 1

摘要

丘比特-0是第一个基于高富集闪烁辐射热计的无中微子双β衰变(0νββ)实验。它由自2017年以来在lng运行的一系列Zn82Se探测器组成。在2018年底结束的第一阶段数据采集期间，实验收集了9.95 kg·yr的ZnSe暴露。同时的热光读出提供了强大的α-粒子抑制，并允许我们将感兴趣区域的背景抑制到3.5−0.9+1.0×10−3计数/(keV·kg·y)，这是该技术前所未有的水平。由于这一成就，我们对82se0 νββ半衰期设定了最严格的下限。此外，我们还开发了一个完整的背景模型，使我们能够确定感兴趣地区事件的起源。丘比特-0光谱的重建使我们能够对82Se的2νββ进行最精确的测量。丘比特-0是第一个基于高富集闪烁辐射热计的无中微子双β衰变(0νββ)实验。它由自2017年以来在lng运行的一系列Zn82Se探测器组成。在2018年底结束的第一阶段数据采集期间，实验收集了9.95 kg·yr的ZnSe暴露。同时的热光读出提供了强大的α-粒子抑制，并允许我们将感兴趣区域的背景抑制到3.5−0.9+1.0×10−3计数/(keV·kg·y)，这是该技术前所未有的水平。由于这一成就，我们对82se0 νββ半衰期设定了最严格的下限。此外，我们还开发了一个完整的背景模型，使我们能够确定感兴趣地区事件的起源。丘比特-0光谱的重建使我们能够对82Se的2νββ进行最精确的测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Results on double beta decay of 82Se with CUPID-0 Phase I

CUPID-0 is the first neutrinoless double beta decay (0νββ) experiment based on highly enriched scintillating bolometers. It consists in an array of Zn82Se detectors operated at LNGS since 2017. During the Phase I of data taking, concluded at the end of 2018, the experiment collected an exposure of 9.95 kg·yr of ZnSe. The simultaneous heat-light readout provides a powerful rejection of α-particles and allows us to suppress the background in the region of interest down to 3.5−0.9+1.0×10−3 counts/(keV·kg·y), an unprecedented level for this technique. Thanks to this achievement, we set the most stringent lower limit on the 82Se 0νββ half-life. Moreover, we have developed a full background model, which allows us to identify the origin of the events in the region of interest. The reconstruction of the CUPID-0 spectrum has enabled us to perform the most precise measurement of the 2νββ of 82Se.CUPID-0 is the first neutrinoless double beta decay (0νββ) experiment based on highly enriched scintillating bolometers. It consists in an array of Zn82Se detectors operated at LNGS since 2017. During the Phase I of data taking, concluded at the end of 2018, the experiment collected an exposure of 9.95 kg·yr of ZnSe. The simultaneous heat-light readout provides a powerful rejection of α-particles and allows us to suppress the background in the region of interest down to 3.5−0.9+1.0×10−3 counts/(keV·kg·y), an unprecedented level for this technique. Thanks to this achievement, we set the most stringent lower limit on the 82Se 0νββ half-life. Moreover, we have developed a full background model, which allows us to identify the origin of the events in the region of interest. The reconstruction of the CUPID-0 spectrum has enabled us to perform the most precise measurement of the 2νββ of 82Se.

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