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Investigation of response behavior in CdTe detectors versus inter-electrode charge formation position

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9 Author(s)
Auricchio, N. ; Ist. TESRE, CNR, Bologna, Italy ; Caroli, E. ; De Cesare, G. ; Donati, A.
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Some important features of semiconductor detectors (pulse height, energy resolution, photopeak efficiency) are strongly affected by charge collection efficiency; therefore low charge mobility and trapping/detrapping phenomena can more or less degrade the CdTe based detectors performance, depending on the distance between the charge formation location and the collecting electrodes. Using a narrow photon beam, obtained by a 20 mm thick tungsten collimator, we have studied the response of a small sample of CdTe(Cl) planar detectors. In particular we have investigated the behavior of the above parameters vs. the charge formation position induced by the incoming radiation irradiating the detectors perpendicularly to the electric field and performing a fine scanning of the inter-electrode region

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Nuclear Science, IEEE Transactions on  (Volume:46 ,  Issue: 4 )