The comparison on the performance of a gamma-ray spectrometer with the variation of Pt(Au)/CdZnTe/Pt(Au) interface

Cd1-xZnxTe grown by high-pressure Bridgman method (HPB) has been known to b e a good candidate for gamma-ray detection material. The metal contacting c onditions are very important for the performance of gamma-ray detector. The refore, it is essential to find proper contact technology. For these purpos es, various contact methods (electroless deposition, thermal vacuum evapora tion) and materials (Au, Pt) are attempted. From the measurement of current -voltage characteristics, gamma-ray spectroscopy and auger electron spectro scopy (AES), the physical properties of metal contact on the CdZnTe are ana lyzed and contact methods compared with one another. Electroless Pt deposit ion is found to have better properties than others in many respects. (C) 20 00 Published by Elsevier Science B.V. All rights reserved.