The GERDA collaboration, M. Agostini, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezru… 展开作者
The GERDA collaboration, M. Agostini, G. Araujo, A. M. Bakalyarov, M. Balata, I. Barabanov, L. Baudis, C. Bauer, E. Bellotti, S. Belogurov, A. Bettini, L. Bezrukov, V. Biancacci, E. Bossio, V. Bothe, V. Brudanin, R. Brugnera, A. Caldwell, C. Cattadori, A. Chernogorov, T. Comellato, V. D'Andrea, E. V. Demidova, N. Di Marco, E. Doroshkevich, F. Fischer, M. Fomina, A. Gangapshev, A. Garfagnini, C. Gooch, P. Grabmayr, V. Gurentsov, K. Gusev, J. Hakenmüller, S. Hemmer, R. Hiller, W. Hofmann, J. Huang, M. Hult, L. V. Inzhechik, J. Janicskó Csáthy, J. Jochum, M. Junker, V. Kazalov, Y. Kermaïdic, H. Khushbakht, T. Kihm, K. Kilgus, A. Kirsch, I. V. Kirpichnikov, A. Klimenko, K. T. Knöpfle, O. Kochetov, V. N. Kornoukhov, P. Krause, V. V. Kuzminov, M. Laubenstein, A. Lazzaro, M. Lindner, I. Lippi, A. Lubashevskiy, B. Lubsandorzhiev, G. Lutter, C. Macolino, B. Majorovits, W. Maneschg, L. Manzanillas, M. Miloradovic, R. Mingazheva, M. Misiaszek, Y. Müller, I. Nemchenok, K. Panas, L. Pandola, K. Pelczar, L. Pertoldi, P. Piseri, A. Pullia, C. Ransom, L. Rauscher, M. Redchuk, S. Riboldi, N. Rumyantseva, C. Sada, F. Salamida, S. Schönert, J. Schreiner, M. Schütt, A. -K. Schütz, O. Schulz, M. Schwarz, B. Schwingenheuer, O. Selivanenko, E. Shevchik, M. Shirchenko, L. Shtembari, H. Simgen, A. Smolnikov, D. Stukov, A. A. Vasenko, A. Veresnikova, C. Vignoli, K. von Sturm, V. Wagner, T. Wester, C. Wiesinger, M. Wojcik, E. Yanovich, B. Zatschler, I. Zhitnikov, S. V. Zhukov, D. Zinatulina, A. Zschocke, A. J. Zsigmond, K. Zuber, G. Zuzel
The GERmanium Detector Array (GERDA) collaboration searched for neutrinoless double-$β$ decay in $^{76}$Ge using isotopically enriched high purity germanium detectors at the Laboratori Nazionali del Gran Sasso of INFN. After Phase I (2011-2013), the experiment benefited from several upgrades, including an additional active veto based on LAr instrumentation and a significant increase of mass by point-contact germanium detectors that improved the half-life sensitivity of Phase II (2015-2019) by an order of magnitude. At the core of the background mitigation strategy, the analysis of the time profile of individual pulses provides a powerful topological discrimination of signal-like and background-like events. Data from regular $^{228}$Th calibrations and physics data were both considered in the evaluation of the pulse shape discrimination performance. In this work, we describe the various methods applied to the data collected in GERDA Phase II corresponding to an exposure of 103.7 kg$\cdot$yr. These methods suppress the background by a factor of about 5 in the region of interest around Q$_{ββ}$ = 2039 keV, while preserving (81$\pm$3)% of the signal. In addition, an exhaustive list of parameters is provided which were used in the final data analysis.
Pulse shape discrimination studies with a Broad-Energy Germanium detector for signal identification and background suppression in the GERDA double beta decay experiment
Isotopically modified Ge detectors for {\sc Gerda}: from production to operation
\textsc{Gerda}实验通过新颖的脉冲形状鉴别（PSD）技术来搜索无中微子双β（$0νβ$ β $) decay of $ ^{76} $Ge using high-purity germanium detectors made of material enriched in $ ^{76} $Ge. For Phase II of the experiment a sensitivity for the half life $ T_{1/2} ^{0ν}\，\，\sim 2 \cdot 10^{26} $ yr is envisioned. Modified Broad Energy Germanium detectors (BEGe) with thick n$ ^+ $ electrodes provide the capability to efficiently identify and reject background events, while keeping a large acceptance for the $ 0νβ $beta$ -衰变信号。生产厚窗口BEGe型探测器的\textsc{Gerda}实验的可行性证明了通过测试所有的生产步骤，从采购的同位素改性锗工作BEGe探测器。对\textsc{Gerda} Phase II原型BEGe探测器的光谱…
Pulse shape discrimination performance of Inverted Coaxial Ge detectors
我们报告的两个倒置的同轴锗探测器的特性的背景下，在未来的$^{76}$锗无中微子双β（$0νββ$）衰变实验。与目前在GERDA $0νββ$衰变实验中使用的平面宽能Ge探测器（BEGe）相比，这样的探测器可以用更大的Ge质量来生产，这是一个优点。由于电缆、电子器件和支架的减少，这将导致搜索$0νββ$衰减的背景降低。在$^{76}$ Ge Q值附近的2039 keV测量分辨率为2.5 keV，它们的脉冲形状特性与BEGe探测器相似。得出的结论是，这种类型的Ge探测器适合用于$^{76}$ Ge $0νββ$衰变实验。
Pulse-shape discrimination potential of new scintillator material: La-GPS:Ce
(Gd，La）$_2$ Si $_2$ O $_7$：Ce（La-GPS：Ce）是一种新型闪烁体材料，具有高的光输出、高的能量分辨率和快的衰减时间。此外，闪烁体即使在高温（高达150 $^\circ$ C）下也具有良好的光输出，并且本质上不吸湿;因此，它特别适合于地下资源勘探。粒子识别极大地扩展了闪烁体的应用范围。对于资源勘探，颗粒识别应仅在单个脉冲中完成。确认了闪烁体的脉冲形状辨别。我们比较了两种方法：一种是双门方法，一种是数字滤波方法。使用数字滤波器方法（形状指示器），在0.66 MeVee下获得用于评估$α$和$γ$颗粒之间的分离的F-测量为0.92。
CsI(Tl) Pulse Shape Discrimination with the Belle II Electromagnetic Calorimeter as a Novel Method to Improve Particle Identification at Electron-Positron Colliders
