Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector

REN Shao-Jun; SANG Wen-Bin; JIN Wei; LI Wan-Wan; ZHANG Qi; MIN Jia-Hua

Chinese Physics C> 2004, Vol. 28> Issue(2) : 191-195

Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector

School of Materials Science and Engineering,Shanghai University,Shanghai 201800,China

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Abstract：
The Monte Carlo simulation software is developed based on the operating principle of CdZnTe detector, the randomicity of γ ray reaction in the detector and the statistic rule of the amount of electron-hole pairs produced. First, the reaction depth of photons is calculated based on the disintegration rule. Secondly, the reaction section of every reaction is estimated and the reaction probability of the three atoms in CZT and the probability of every reaction of every atom are calculated. Based on these probabilities, the category of atoms and the type of reactions of a photon reacting with the detector are determined and the amount of electron-hole pairs produced by the photon is obtained. From the reaction depth and the amount of electron-hole pairs produced, the amount of charge collected can be calculated.;The response energy spectra of γ ray in the CdZnTe detector are simulated by using the Monte Carlo software developed. The simulation results are well comparable with the data of the real CdZnTe devices. In addition, the ideal thickness of the device, which is of maximum detecting efficiency, is also obtained based on the analysis over the relationship between the thickness and the efficiency, assuming the device to be under the radiation of ⁵⁷Co source.

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REN Shao-Jun, SANG Wen-Bin, JIN Wei, LI Wan-Wan, ZHANG Qi and MIN Jia-Hua. Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector[J]. Chinese Physics C, 2004, 28(2): 191-195.

REN Shao-Jun, SANG Wen-Bin, JIN Wei, LI Wan-Wan, ZHANG Qi and MIN Jia-Hua. Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector[J]. Chinese Physics C, 2004, 28(2): 191-195. shu

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Received: 2003-04-30
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector

Corresponding author: REN Shao-Jun,

School of Materials Science and Engineering,Shanghai University,Shanghai 201800,China

Received Date: 2003-04-30

Accepted Date: 1900-01-01

Available Online: 2004-02-05

Abstract: The Monte Carlo simulation software is developed based on the operating principle of CdZnTe detector, the randomicity of γ ray reaction in the detector and the statistic rule of the amount of electron-hole pairs produced. First, the reaction depth of photons is calculated based on the disintegration rule. Secondly, the reaction section of every reaction is estimated and the reaction probability of the three atoms in CZT and the probability of every reaction of every atom are calculated. Based on these probabilities, the category of atoms and the type of reactions of a photon reacting with the detector are determined and the amount of electron-hole pairs produced by the photon is obtained. From the reaction depth and the amount of electron-hole pairs produced, the amount of charge collected can be calculated.;The response energy spectra of γ ray in the CdZnTe detector are simulated by using the Monte Carlo software developed. The simulation results are well comparable with the data of the real CdZnTe devices. In addition, the ideal thickness of the device, which is of maximum detecting efficiency, is also obtained based on the analysis over the relationship between the thickness and the efficiency, assuming the device to be under the radiation of ⁵⁷Co source.

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Primary Study of Monte Carlo Simulation on CdZnTe Nuclear Detector

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