Preliminary Measurement of the K-Shell Ionization Cross Sections of Ti by Positron Impact in the Low Energy Region

作     者：田丽霞 刘慢天 朱敬军 安竹 王宝义 秦秀波 

作者机构：Key Laboratory of Radiation Physics and Technology of Ministry of EducationInstitute of Nuclear Science and TechnologySichuan University East China Institute of Technology Key Laboratory of Nuclear Analysis TechniquesInstitute of High Energy PhysicsCAS 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2012年第14卷第5期

页      面：434-437页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China (Nos.10674097 10774106) 

主　　题：positron impact ionization cross sections thick-target method Monte Carlosimulation 

摘      要：Measurements were performed of K-shell ionization cross sections of Ti element by 10～30 keV positron impact using the thick-target method. The effects of multiple scattering of incident positron and from bremsstrahlung photons and annihilation photons with the thick-target method are discussed with the Monte Carlo code PENELOPE. Meanwhile, the Monte Carlo method is also applied to determine the detection efficiencies of X- and γ-ray detectors. Our experimental K-shell ionization cross sections for Ti element are compared with the distorted-wave Born approximation （DWBA） theoretical predictions, and it is found that the agreement of the experimental data and theoretical values is good and this indicates that the experimental method adopted in this study is applicable.