DocumentCode :
3456488
Title :
Characterization of small CdTe detectors to be used for linear and matrix arrays
Author :
Casali, Fabio ; Bollini, D. ; Chirco, P. ; Rossi, Mattia ; Baldazzi, G. ; Dusi, W. ; Caroli, E. ; DiCocco, G. ; Donati, A. ; Landini, G. ; Stephen, J.B.
Author_Institution :
Dipartimento di Fisica, Bologna Univ., Italy
fYear :
1991
fDate :
2-9 Nov. 1991
Firstpage :
75
Abstract :
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.<>
Keywords :
Monte Carlo methods; X-ray detection and measurement; gamma-ray detection and measurement; semiconductor counters; 10 keV; 100 keV; 11 keV; 45 ns; 500 to 700 keV; CdTe detectors; Monte Carlo simulation; X-ray; bias electric field; energy resolution; gamma-ray; time resolution; Absorption; Astrophysics; Crystals; Energy resolution; Geometry; Monte Carlo methods; Production; Radiation detectors; Sensor arrays; Spatial resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
Type :
conf
DOI :
10.1109/NSSMIC.1991.258917
Filename :
258917
Link To Document :
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