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Damage induced by ionizing radiation on CdZnTe and CdTe detectors

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3 Author(s)
Fraboni, Beatrice ; Dept. of Phys., Univ. of Bologna, Italy ; Cavallini, Anna ; Dusi, W.

Radiation damage can strongly affect the performance of detectors and we have carried out a systematic study on the effects of different ionizing radiation on CdTe and CdZnTe detectors. In this paper, we present a novel perspective of investigation on the effects of gamma rays, electrons, neutrons, and protons by correlating the "macroscopic" performance of the detectors, characterized by gamma spectroscopy measurements, to the "microscopic" effects of impinging radiation, i.e., to the defective states induced within the crystal lattice, by carrying out photoinduced current transient spectroscopy (PICTS ) analyses. The comparison of the results obtained from CdTe and CdZnTe allows for the identification of the defects that play a major role in degrading the detectors' spectroscopic capabilities.

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Nuclear Science, IEEE Transactions on  (Volume:51 ,  Issue: 3 )