19 October 1999 Comparison of the radiation damage induced by thermal neutrons in CdTe and CdZnTe detectors
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Abstract
In recent years, room temperature semiconductor detectors like CdTe and CdZnTe have been proposed for several scientific, industrial and medical applications. In some cases, these applications require the capability to operate for a long time in intense, sometimes mixed, radiation fields while retaining full spectroscopic performances. In spite of its importance, a detailed characterization of the effects of the radiation damage has not been competed yet for these materials. However, preliminary results carried out by irradiating CdTe detectors with 60Co gamma rays demonstrated that the fatal photon dose is on the order of some tens of thousands Gy, while the detectors are rather insensitive to doses up to few thousands Gy. A wider activity is now being performed by the authors studying both the CdTe and the CdZnTe when involving several types of irradiating sources and different techniques to quantify the induced damaging. This includes the detailed quantitative analysis of retained spectroscopic performances at low and medium energies, the measurement of the dark current and the characterization of the defects and modifications induced in the structure of the crystal by the irradiation process.
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Piero L. Chirco, Piero L. Chirco, MariaPia Morigi, MariaPia Morigi, Martina Zanarini, Martina Zanarini, Anna D.M. Cavallini, Anna D.M. Cavallini, B. Fraboni, B. Fraboni, Natalia Auricchio, Natalia Auricchio, Ezio Caroli, Ezio Caroli, Waldes Dusi, Waldes Dusi, Paul Fougeres, Paul Fougeres, Makram Hage-Ali, Makram Hage-Ali, Paul Siffert, Paul Siffert, "Comparison of the radiation damage induced by thermal neutrons in CdTe and CdZnTe detectors", Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366609; https://doi.org/10.1117/12.366609
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