Speaker
Description
Searching for neutrinoless double-beta (0νββ) decay is considered a promising approach for proving the Majorana nature of neutrinos. Background suppression is particularly important in 0νββ decay searches, which are considered rare-event searches. For traditional single-electrode high-purity germanium (HPGe) detectors, pulse shape analysis methods such as A/E are effective in distinguishing between single-site and multi-site events. However, they are inadequate for separating single- and double-electron events because of insufficient position resolution. Orthogonal-strip planar HPGe detectors, which offer excellent energy resolution, low background, high detection efficiency, and, most importantly, three-dimensional position sensitivity, are ideal for 0νββ searches. In this work, we developed a waveform simulation platform for orthogonal-strip planar HPGe detectors to systematically study their response to single- and multi-site events, as well as to single- and double-electron events. Furthermore, key detector parameters, such as electrode configuration and crystal thickness, were optimized to improve performance in 76Ge 0νββ detection. Our results demonstrate the feasibility and advantages of applying orthogonal-strip planar HPGe detectors for 0νββ detection, providing valuable guidance for future detector design.
