Cadmium Zinc Telluride (CZT) detectors are portable, room temperature serviceable, medium-resolution gamma-ray spectrometers. Their full-energy peak shape exhibits a low energy tail which complicates the analysis of spectra with overlapping peaks. In this paper, we determined the peak shape parameters of a CZT detector from measurements with calibrated point sources from 0.06 MeV up to 1.332 MeV. The peak shape parameters were obtained by applying a peak fitting algorithm that includes a Gaussian and a tail with energy dependent parameters in the region around the gamma-ray peak. The net peak areas were used to verify the absolute detection efficiency obtained with a Monte Carlo model of the CZT detector and the agreement in absolute terms was within 10% over the considered energy range. The peak fitting algorithm was then applied to determine the net peak areas of the full energy peak in spectra recorded with certified uranium standards. The enrichment was then determined by using the so-called ‘peak ratio’ method. We observed a systematic bias in the net peak areas of the 0.258 MeV gamma-ray which therefore was not included in the analysis. Hence, the enrichment was underestimated by about 10%.

碲化镉锌（CZT）探测器是便携式的，可在室温下使用的中分辨率伽马射线光谱仪。它们的全能峰形状显示出低能尾部，这使具有重叠峰的光谱分析变得复杂。在本文中，我们通过从0.06 MeV到1.332 MeV的校准点源进行测量，确定了CZT检测器的峰形参数。通过应用峰拟合算法来获得峰形状参数，该算法包括在伽马射线峰周围的区域中具有高斯参数和能量依赖参数的尾部。净峰面积用于验证使用CZT检测器的蒙特卡洛模型获得的绝对检测效率，并且在考虑的能量范围内，绝对值的一致性在10％以内。然后应用峰拟合算法来确定用认证的铀标准记录的光谱中全能峰的净峰面积。然后通过使用所谓的“峰比率”方法来确定富集。我们观察到0.258 MeV伽马射线的净峰面积存在系统性偏差，因此该分析未包括在内。因此，富集被低估了约10％。