Fabrication and Characterization of Room Temperature Nuclear Radiation CdZnTe 3×3 Pixel Array Detector

The detector-grade crystal was manufactured by modify bridgman method in Yinnel Tec. The resistivity of the CZT is ~10¹¹(Ω.cm). Their high resistivity caused low leakage current. We fabricated 3×3 pixel array detector. We measure spectral response of the detector, through Gaussian Fitting, The energy resolution of the detector is 23.7%(28.9 keV FWHM) for 122 keV ⁵⁷Co and 17.9%(117.8 keV FWHM) for 662 keV ¹³⁷Cs, respectively. The spectrum is gauss distributing. Low energy band tail is sharp. It shows that effect of hole is weak. the detector has no polarization.