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Proceedings Paper

CdZnTe detector as an x-ray spectrometer
Author(s): Satoshi Miyajima; Hideaki Sakuragi; Masao Matsumoto
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Paper Abstract

In this study, we evaluated a CdZnTe (CZT) detector as an x-ray spectrometer. The output of the semiconductor detector is basically distorted due to the processes of energy deposition, charge generation and pulse processing. In addition, the distortion due to the charge transport process must be taken into account when using a CZT detector. First, we calculated response functions of the CZT detector using the EGS4. In the code, the Hecht equation was utilized to deal with the trapping of charge carriers during charge transport. The parameters in the equation, mean free path of charge carriers, were determined to make the calculated response functions the same as the measured response to mono-energetic gamma-rays. Secondly, we corrected x-ray spectra using the calculated response functions. The stripping method was employed in the correction procedure. The results indicate that a CZT detector is useful in x-ray spectrometry with the proper corrections.

Paper Details

Date Published: 28 June 2001
PDF: 8 pages
Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430925
Show Author Affiliations
Satoshi Miyajima, Osaka Univ. Graduate School of Medicine (Japan)
Hideaki Sakuragi, Osaka Univ. School of Allied Health Sciences (Japan)
Masao Matsumoto, Osaka Univ. School of Allied Health Sciences (Japan)

Published in SPIE Proceedings Vol. 4320:
Medical Imaging 2001: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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