利用106CdWO4闪烁体寻找106Cd双β衰变的低背景实验

IF 0.4 Q4 PHYSICS, NUCLEAR

Nuclear Physics and Atomic Energy Pub Date : 2023-09-20 DOI:10.15407/jnpae2023.03.193

P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F.A. Danevich, A. Inchicchitti, D.V. Kasperovych, V.R. Klavdiienko, V.V. Kobychev, A. Leoncini, V. Merlo, O.G. Polischuk, V.I. Tretyak

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引用次数: 0

摘要

在意大利Gran Sasso地下实验室，利用富含66% 106Cd (106CdWO4)的215 g钨酸镉闪烁晶体，进行了寻找106Cd的2ε-、εβ+-和2β+-衰变的实验。106CdWO4探测器中的事件记录与两个大体积CdWO4闪烁计数器(反)重合。描述了探测器系统的设计、校准和背景测量、确定探测器关键特性的数据分析方法和结果。将实验数据与蒙特卡罗仿真结果进行了比较，并建立了背景模型。对装置部件的放射性污染进行了研究。实验的灵敏度接近2νεβ+-衰变通道的理论预测水平，而对于其他可能的2β-衰变通道，它已经处于lim T1/2 ~ 1021-1022年的水平。

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Low-background experiment to search for double beta decay of 106Cd using 106CdWO4 scintillator

An experiment to search for 2ε-, εβ+- and 2β+-decays of 106Cd, using a 215 g cadmium tungstate scintillation crystal enriched at 66 % by 106Cd (106CdWO4) is carried out at the Gran Sasso underground laboratory (Italy). Events in the 106CdWO4 detector are recorded in (anti)coincidences with two large-volume CdWO4 scintillation counters. The design of the detector system, calibration and background measurements, methods, and results of data analysis to determine key detector characteristics are described. The experimental data are compared with Monte Carlo simulation results, and a background model is constructed. The radioactive contamination of the setup components is studied. The sensitivity of the experiment approaches the level of theoretical predictions for the 2νεβ+-decay channel, while for other possible 2β-decay channels it is already on the level of lim T1/2 ∼ 1021-1022 years.

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来源期刊

Nuclear Physics and Atomic Energy PHYSICS, NUCLEAR-

CiteScore

0.70

自引率

33.30%

发文量

审稿时长

19 weeks

期刊介绍： The journal Nuclear Physics and Atomic Energy presents the publications on Nuclear Physics, Atomic Energy, Radiation Physics, Radioecology, Engineering and Methods of Experiment. The journal includes peer-reviewed articles which are completed works containing new results of theoretical and experimental researches and are of interest for the scientists, postgraduate students, engineers and for the senior students.