In the last two decades, great efforts have been made in the development of 3D cadmium–zinc–telluride (CZT) detectors operating at room temperature for gamma‐ray spectroscopic imaging. This work presents the spectroscopic performance of new high‐resolution CZT drift strip detectors, recently developed at IMEM‐CNR of Parma (Italy) in collaboration with due2lab (Italy). The detectors (19.4 mm × 19.4 mm × 6 mm) are organized into collecting anode strips (pitch of 1.6 mm) and drift strips (pitch of 0.4 mm) which are negatively biased to optimize electron charge collection. The cathode is divided into strips orthogonal to the anode strips with a pitch of 2 mm. Dedicated pulse processing analysis was performed on a wide range of collected and induced charge pulse shapes using custom 32‐channel digital readout electronics. Excellent room‐temperature energy resolution (1.3% FWHM at 662 keV) was achieved using the detectors without any spectral corrections. Further improvements (0.8% FWHM at 662 keV) were also obtained through a novel correction technique based on the analysis of collected‐induced charge pulses from anode and drift strips. These activities are in the framework of two Italian research projects on the development of spectroscopic gamma‐ray imagers (10–1000 keV) for astrophysical and medical applications.

中文翻译：

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高分辨率3D镉锌碲化物漂移带探测器的最新进展

在过去的二十年中，人们在开发3D镉锌碲化物（CZT）探测器方面做出了巨大的努力，该探测器在室温下进行伽马射线光谱成像。这项工作展示了新的高分辨率CZT漂移条检测器的光谱性能，该检测器是最近在意大利Parma的IMEM-CNR与Due2lab（意大利）合作开发的。探测器（19.4毫米×19.4毫米×6毫米）被组织成收集阳极带（间距为1.6毫米）和漂移带（间距为0.4毫米），它们被负偏置以优化电子电荷的收集。阴极被分成与阳极带正交的带，其间距为2mm。使用定制的32通道数字读出电子设备，对收集的和感应的电荷脉冲形状进行了专用的脉冲处理分析。使用无需任何光谱校正的检测器，即可获得出色的室温能量分辨率（662 keV时为1.3％FWHM）。通过基于阳极和漂移带收集到的感应电荷脉冲的分析的新型校正技术，也获得了进一步的改进（在662 keV时FWHM为0.8％）。这些活动是在两个意大利研究项目的框架内进行的，这些项目是为天体医学和医学应用开发光谱伽马射线成像仪（10–1000 keV）。