Study well-shaped germanium detectors for low-background counting

2nd Workshop on Germanium Detectors and Technologies

Wei, W.-Z.^1 ; Mei, D.-M.^1,2 ; Zhang, C.^1

Department of Physics, University of South Dakota, United States, Vermillion

SD

57069, United States^1

School of Physics and Optoelectronic, Yangtze University, Jingzhou

434023, China^2

关键词: Detector efficiency;    Detector performance;    Detector sensitivity;    Energy resolutions;    Generation experiments;    Germanium detector;    Low background;    Ultra low backgrounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/606/1/012019/pdf
DOI  :  10.1088/1742-6596/606/1/012019

来源: IOP

【 摘 要 】

Radiogenic particles are known as the main sources of background for all ultra-low background experiments in the detection of dark matter and neutrino properties. In particular, the radiogenic gamma rays from PMTs are a main component of the observed backgrounds in the noble liquid detectors such as XENON100 and LUX. This suggests a more accurate screening of PMTs is needed for the next generation experiments such as LUX-Zplin or Xenon1T. Hence, we propose to develop well-shaped germanium detectors for a better understanding of the radiogenic background from PMTs. A well-shaped germanium detector array and PMT (R11410MOD) have been designed in a Geant4-based Monte Carlo simulation, in which three radiogenic background isotopes from238U,232Th and40K have been studied. In this work, we show the detector performance including the detector efficiency, energy resolution and the detector sensitivity for low-background counting in the detection of rare event physics.