Compensation of CdZnTe signals using a twin shaping filter technique

Natalia Auricchio, Angelo Basili, Ezio Caroli, Ariano Donati, Turiddo Franceschini, Filippo Frontera, Makram Hage-Ali, Gianni Landini, Antonella Roggio, Filomena Schiavone, John Buchan Stephen, Giulio Ventura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The performance of high Z solid state detectors has been significantly improved over the last decade: one of the most promising materials for X and gamma ray detectors is CdTe/CdZnTe, which has high detection efficiency, no requirement for cooling to cryogenic temperatures, good spectroscopic performances, good time response and imaging capabilities. Unfortunately some important features of semiconductor detectors (pulse height, energy resolution, photopeak efficiency) are affected by the charge collection efficiency: the low mobility of the charge carriers (particularly the holes) and trapping/detrapping phenomena can degrade the CdTe/CdZnTe detectors' performances, depending on the distance between the charge formation position and the collecting electrodes. The deterioration of the spectroscopic performances can be reduced by using either hardware or software techniques. The bi-parametric method herein described is based on a hybrid HW and SW technique that utilizes a twin pulse shaping active filter (one 'slow' and one 'fast') to analyse the same signal. This technique could be particularly suitable for implementation in a readout integrated circuit for multipixel detectors. The experimental results obtained with the application of this biparametric technique with CdZnTe detectors are presented in order to assess the reliability and the efficiency of this compensation method as a function of bias voltage and primary photon energy.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
EditorsS.D. Metzler
Pages3399-3403
Number of pages5
Volume5
Publication statusPublished - 2003
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003

Other

Other2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference
CountryUnited States
CityPortland, OR
Period10/19/0310/25/03

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

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  • Cite this

    Auricchio, N., Basili, A., Caroli, E., Donati, A., Franceschini, T., Frontera, F., Hage-Ali, M., Landini, G., Roggio, A., Schiavone, F., Stephen, J. B., & Ventura, G. (2003). Compensation of CdZnTe signals using a twin shaping filter technique. In S. D. Metzler (Ed.), IEEE Nuclear Science Symposium Conference Record (Vol. 5, pp. 3399-3403). [R8-12]