Preparation and Performance of CdZnTe Ray Detector

Jun Jiang(Kunming Institute of Physics)

Abstract

γ-ray and x-ray detectors made by Cd_1-xZn_xTe alloy can gain high energy resolution and detect efficiency at room temperature due to its high atomic number, large energy gap and high density, which were well-developed recently. By well controlled of Cadmium partial pressure and compensatory doping technique, Ф90 mm Cd_1-xZn_xTe alloy obtained successfully (ρ≥10¹¹ Ω·cm) by an improved-Bridgman method. 3 mm × 3 mm × 3 mm CZT detector was made at Kunming Institute of Physics, which has energy resolution of 3.52% (FWHM) at room temperature when detect 59.54 KeV Am²⁴¹ γ-ray source.

Keywords

Cadmium zinc telluride (CZT); Room temperature detector; Crystal growth; Preparation process; Performance

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DOI: http://dx.doi.org/10.26549/met.v6i1.9507