γ-ray spectroscopy response for CdZnTe planar detector(10 mm×10 mm×2.5 mm) made by ourself is evaluated using an un-collimated 241Am(59.5 keV) radioactive source at room temperature for 10 h continuously,in which the polarization is not occurred.The γ-ray(59.5 keV) response spectra of the detector are acquired for a long time(1 year),it shows that operation of the detector is stable.A thick CdZnTe capacitive Frisch grid detector(10 mm×5 mm×10 mm) is fabricated in order to approach high collectio...