Abstract
Cadmium telluride (CdTe) radiation detectors are usable at room temperature. Recently, very pure CdTe crystals have become available thanks to recent improvements in their manufacturing process, making CdTe radiation detectors more attractive for industrial applications. The basic performance of a CdTe detector was investigated to examine the feasibility of such radiation detectors in nuclear power plants. Peak energy resolution is obtained in the energy range of 60 keV with a resolution of 3.2 keV; further, for photons under 800 keV the resolution remains better than 10 keV. The sensitivity decreases regularly as photon energy increases. The sensitivity of the CdTe radiation detector was calculated by the Monte Carlo simulation code EGS4 (Electron-Gamma Shower version 4). The sensitivity of CdTe radiation detectors in the high energy region has been improved by means of a multi-layered structure. Consequently, the relative sensitivity becomes greater than the number of layers because of the effects of multiple scattering in the CdTe multi-layered detector.
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