Research on energy resolution and crosstalk characteristics of silicon microstrip detectors with different isolation structures

With the advancement of silicon microstrip detectors, interstrip crosstalk characteristics have gradually become a problem that cannot be ignored. When particles are incident on the detector, the existence of interstrip crosstalk can result in spurious signals and signal overlap, reducing the position resolution of the device. In response to this issue, this paper optimizes the interstrip isolation structure of silicon microstrip detectors by designing two distinct types: two-dimensional isolation and three-dimensional isolation. Energy spectrum detection demonstrated that detectors featuring these two isolation structures successfully identified α particles from ²⁴¹Am and ²⁴⁴Cm with an energy resolution of less than 1%. Notably, compared to the three-dimensional isolation structure, the two-dimensional isolation structure exhibits reduced interstrip crosstalk, achieving a crosstalk rate as low as 0.25%, which significantly mitigates signal interference caused by interstrip crosstalk and provides a way for the further development of position-resolved detectors.