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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 1,417 - 1,427 (11page)
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In this study, we evaluated the performance of a commercial pixelated cadmium zinc telluride (CZT)detector for spectroscopy and identified its feasibility as a Compton camera for radiation monitoring in anuclear power plant. The detection system consisted of a 20 mm 20 mm 5 mm CZT crystal with 8 8pixelated anodes and a common cathode, in addition to an application specific integrated circuit. Theperformance of the various radioisotopes 57Co, 133Ba, 22Na, and 137Cs was evaluated. In general, theamplitude of the induced signal in a CZT crystal depends on the interaction position and material nonuniformity. To minimize this dependency, a drift time correction was applied. The depth of each interactionwas calculated by the drift time and the positional dependency of the signal amplitude wascorrected based on the depth information. After the correction, the Compton regions of each spectrumwere reduced, and energy resolutions of 122 keV, 356 keV, 511 keV, and 662 keV peaks were improvedfrom 13.59%, 9.56%, 6.08%, and 5%e4.61%, 2.94%, 2.08%, and 2.2%, respectively. For the Compton imaging,simulations and experiments using one 137Cs source with various angular positions and two 137Cs sourceswere performed. Individual and multiple sources of 133Ba, 22Na, and 137Cs were also measured. Theimages were successfully reconstructed by weighted list-mode maximum likelihood expectation maximizationmethod. The angular resolutions and intrinsic efficiency of the 137Cs experiments wereapproximately 7 e9 and 5 10 4e7 10 4, respectively. The distortions of the source distribution wereproportional to the offset angle
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참고문헌 (32)
참고문헌 신청
S. D. Sordo / 2009 / Progress in the development of CdTe and CdZnTe semiconductor radiation detectors for astrophysical and medical applications / Sensors 9:3491~3526
조우진 / 2016 / Preliminary Research of CZT Based PET System Development in KAERI / 방사선방어학회지 41(2):81~86
L. Cirignano / 2004 / Evaluation of CZT detectors with capacitive Frisch grid structure / Proc. SPIE 5198:1~8
Z. He / 1999 / 3-D position sensitive CdZnTe gamma-ray spectrometers / Nucl. Instrum. Methods A 422:173~178
P. N. Luke / 1995 / Unipolar charge sensing with coplanar electrodes - application to semiconductor detectors / IEEE Trans. Nucl. Sci 42:207~213
조우진 / 2016 / Preliminary Research of CZT Based PET System Development in KAERI / 방사선방어학회지 41(2):81~86
L. Cirignano / 2004 / Evaluation of CZT detectors with capacitive Frisch grid structure / Proc. SPIE 5198:1~8
Z. He / 1999 / 3-D position sensitive CdZnTe gamma-ray spectrometers / Nucl. Instrum. Methods A 422:173~178
P. N. Luke / 1995 / Unipolar charge sensing with coplanar electrodes - application to semiconductor detectors / IEEE Trans. Nucl. Sci 42:207~213
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