GERDA中用于未来双β衰变实验的反同轴$^{76}$Ge探测器表征
仪器与探测器
2021-06-29 v1 核实验
摘要
正在利用锗探测器搜寻Ge的无中微子双β衰变，其中衰变源与探测器为同一物质。对于未来实验的成功，增加探测器质量十分重要。我们在此报道由富集至88% Ge的材料制成的五只反同轴（IC）几何原型探测器的表征与测试。IC探测器结合了传统半同轴Ge探测器的大质量与点接触探测器优越的能量分辨及脉冲形状甄别能力，而后者质量迄今低得多。在GERDA装置中，无论于真空低温恒温器中还是裸露置于液氩中运行，其性能均令人满意。在Ge双β衰变Q值（Q = 2039 keV）处测得的真空低温恒温器能量分辨率约为2.1 keV半高全宽。在GERmanium Detector Array（GERDA）实验超低本底环境中运行18个月、累积曝光量8.5 kgyr后，经分析切割后的本底指数在Q附近测得为 counts /(keVkgyr)。本工作确认了IC探测器用于下一代实验LEGEND的可行性。
引用
@article{arxiv.2103.15111,
title = {Characterization of inverted coaxial $^{76}$Ge detectors in GERDA for future double-$\beta$ decay experiments},
author = {GERDA collaboration and M. Agostini and G. R. Araujo and A. M. Bakalyarov and M. Balata and I. Barabanov and L. Baudis and C. Bauer and E. Bellotti and S. Belogurov and A. Bettini and L. Bezrukov and V. Biancacci and E. Bossio and V. Bothe and V. Brudanin and R. Brugnera and A. Caldwell and C. Cattadori and A. Chernogorov and T. Comellato and V. D'Andrea and E. V. Demidova and N. Di Marco and E. Doroshkevich and F. Fischer and M. Fomina and A. Gangapshev and A. Garfagnini and C. Gooch and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenmüller and S. Hemmer and W. Hofmann and J. Huang and M. Hult and L. V. Inzhechik and J. Janicskó Csáthy and J. Jochum and M. Junker and V. Kazalov and Y. Kermaïdic and H. Khushbakht and T. Kihm and I. V. Kirpichnikov and A. Klimenko and R. Kneißl and K. T. Knöpfle and O. Kochetov and V. N. Kornoukhov and P. Krause and V. V. Kuzminov and M. Laubenstein and M. Lindner and I. Lippi and A. Lubashevskiy and B. Lubsandorzhiev and G. Lutter and C. Macolino and B. Majorovits and W. Maneschg and L. Manzanillas and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and Y. Müller and I. Nemchenok and L. Pandola and K. Pelczar and L. Pertoldi and P. Piseri and A. Pullia and C. Ransom and L. Rauscher and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and S. Schönert and J. Schreiner and M. Schütt and A. -K. Schütz and O. Schulz and M. Schwarz and B. Schwingenheuer and O. Selivanenko and E. Shevchik and M. Shirchenko and L. Shtembari and H. Simgen and A. Smolnikov and D. Stukov and A. A. Vasenko and A. Veresnikova and C. Vignoli and K. von Sturm and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and B. Zatschler and I. Zhitnikov and S. V. Zhukov and D. Zinatulina and A. Zschocke and A. J. Zsigmond and K. Zuber and G. Zuzel},
journal= {arXiv preprint arXiv:2103.15111},
year = {2021}
}
备注
13 pages, 12 figures, submitted to EPJC