Characterization of small CdTe detectors to be used for linear and matrix arrays
| Autor: | Giuseppe Baldazzi, Waldes Dusi, P. Chirco, Ariano Donati, Gianni Landini, Dante Bollini, G. Dicocco, Franco Casali, Ezio Caroli, Massimo Rossi, J. B. Stephen |
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| Rok vydání: | 2002 |
| Předmět: |
Physics
Nuclear and High Energy Physics Photon Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena Monte Carlo method Detector Electromagnetic radiation Particle detector Semiconductor detector Full width at half maximum Optics Nuclear Energy and Engineering Electric field Electrical and Electronic Engineering business |
| Zdroj: | Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference. |
| Popis: | For a better understanding of the performances of X-ray and gamma-ray detectors made of CdTe crystals, the authors have investigated two different operation modes. The first one, the 'type A' solution, has the direction of the bias electric field parallel to the direction of the impinging radiation; the second one, named the 'type B' solution, has the bias electric field perpendicular to this direction. Experimental results and a Monte Carlo simulation applied to type A and B detectors have underlined the advantage of the former configuration for photon energies of the order to 100 keV and of the latter design for photon energies on the order of 500-700 keV, these higher values being typical for medical and industrial applications. Type B detectors of 2.5 mm*2.5 mm*20 mm show a very good energy resolution (full width at half maximum 10 keV for 511 keV and of 11 keV for 662 keV) and an acceptable time resolution (45 ns) even for a preliminary and not-optimized experimental set-up. The Monte Carlo simulation is also described in detail. > |
| Databáze: | OpenAIRE |
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