A refined Monte Carlo code for low-energy electron emission from gold material irradiated with sub-keV electrons  

作　　者：Li-Heng Zhou Shui-Yan Cao Tao Sun Yun-Long Wang Jun Ma 

机构地区：[1]Department of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [2]College of Physics,MIIT Key Laboratory of Aerospace Information Materials and Physics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [3]School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China

出　　处：《Nuclear Science and Techniques》2023年第4期79-92,共14页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos. 12004180, 21906083, 11975122, and 22006067);the Natural Science Foundation of Jiangsu Province (No. BK20190384);the Fundamental Research Funds for the Central Universities (Nos. NE2020006, NS2022095)。

摘　　要：Considering the significance of low-energy electrons(LEEs;0–20 eV) in radiobiology, the sensitization potential of gold nanoparticles(AuNPs) as high-flux LEE emitters when irradiated with sub-keV electrons has been suggested. In this study, a track-structure Monte Carlo simulation code using the dielectric theory was developed to simulate the transport of electrons below 50 keV in gold. In this code, modifications, particularly for elastic scattering, are implemented for a more precise description of the LEE emission in secondary electron emission. This code was validated using the secondary electron yield and backscattering coefficient. To ensure dosimetry accuracy, we further verified the code for energy deposition calculations using the Monte Carlo toolkit, Geant4. The development of this code provides a basis for future studies regarding the role of AuNPs in targeted radionuclide radiotherapy.

关 键 词：Monte Carlo code Secondary electron emission Low-energy electrons 

分 类 号：O462.2[理学—电子物理学]