Lead iodide (PbI 2 ) is an important material for room temperature radiation detectors. In this paper, we have grown PbI 2 single crystal through a special craft, from which γ-ray detector has also been fabricated. X-ray diffraction analysis indicates structure of the grown crystal is 2H with hexagonal space group P3m1. Infrared transmission measurement shows transmission rate of the grown crystal sample (10×10×1mm 3 ) reaches 40% averagely in range of 400~4000cm . Ultraviolet absorbing test indicates cut-off wavelength of the sample is 547.6nm, corresponding band gap of 2.27eV. Room temperature detector fabricated from the grown crystal is sensitive to 241Am 59.5KeV γ-ray. Full width at half maximum (FWHM) of the obtained energy spectrum is 26.7KeV. All the results indicate the PbI 2 crystal grown through the special craft is of good characteristics and can be used for γ-ray detector.

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