Mr. Zhaoli Xu Profile

Zhaoli Xu

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Proceedings Article | 5 August 2009 Paper

Monte Carlo simulation of the energy spectrum for CdZnTe Frisch grid detector

Zhaoli Xu, Linjun Wang, Jiahua Min, Jianyong Teng, Kaifeng Qin, Dongni Hu, Jijun Zhang, Jian Huang, Yiben Xia

Proceedings Volume 7385, 73851C (2009) https://doi.org/10.1117/12.835588

KEYWORDS: Monte Carlo methods, Sensors, Crystals, Gamma radiation, Cadmium, Photons, Zinc, Tellurium, Process modeling, Energy efficiency

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In this paper, we use the Monte-Carlo method to study the reaction of the electron-hole pairs produced to randomicity and the statistics rule, according to the principal of the detector and the gamma ray track in the CdZnTe detector. The EGSnrc software based on Monte-Carlo method is used to simulate the process of carriers' transportation. The statistics rule greatly reflects the result in Monte Carlo simulation. Firstly, we use Ansys software to create a model of the object for Monte-Carlo simulation, which is the basis for our further Monte-Carlo research. During Ansys simulation, a columniform block is created, where the electrical and thermal properties of the materials for simulation use are established. Then, the charge collection efficiency through the statistical approach was calculated using the EGSnrc software. Furthermore, by considering the interaction mechanism of CdZnTe with gamma ray, several modules in the software are added into Monte Carlo simulation. Finally, the pulse height spectra with the response to gamma ray, are available from the simulation. The comparison between the simulation and the measurement result is indicated, which shows that the simulation experiment is reliable. The Frisch grid detector can get the responses more efficiently than other structure devices.

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