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The Distortion of Energy Deposit Distribution of (12)～C Ions in Water

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Plasma Science and Technology 2012年第7期14卷 665-669页

作者：宋玉收颜强井田席印印刘辉兰 College of Nuclear Science and Technology Harbin Engineering University

The transport process of 12C ions in water was studied with SRIM code and Geant4 toolkit. The SRIM results indicate that the transverse diffusion of 12C ion beam causes distortion of energy deposit along the beam direction. The distortion becomes more notable as the transverse diffusion increases. The simulation results of Geant4 indicate that the influence of secondary fragments on energy deposit distribution would be the main factor causing the distortion in higher energy range. In the region adjacent to the beam line where the contribution from 12C ions domi- nates, the contributions from secondary fragments are ignorable. The further from the beam axis the region locates, the larger the contributions from secondary fragments, until the contributions from secondary fragments are ignorable. The further from the beam axis the region locates, the larger the contributions from secondary fragments, until the contributions from secondary frag- ments exceed that of 12C. Among all the secondary fragments, the contributions of H, He and B ions are mostly notable. It is also found that some positron-emitting secondary fragments could be very useful for position emitting tomography （PET）.

关键词： 12C ions simulation secondary fragments energy deposit distribution

Background Simulation of a Fission Fragment Chamber in the Experiment of ^(209)Bi(e,e’K^+)^(209)_ ΛPb

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Plasma Science and Technology 2012年第5期14卷 415-418页

作者：宋玉收刘辉兰席印印颜强胡碧涛 College of Nuclear Science and Technology Harbin Engineering University School of Nuclear Science and Technology Lanzhou University

An experiment for measuring the hyperon-related fission rate was carried out with the reaction 209^Bi（e, e＇K^＋）209^hPb at the Thomas Jefferson National Laboratory （Jlab）. In the experiment, the performance of the fission fragment detector （FFD） was dramaticlly crashed by the background particles in comparison with that during the test without beam. The scattering of the high intensity （500 nA） primary electrons was the dominant cause. Using the GEANT4 toolkit, this report simulates the experimental situation of the target chamber in which the FFD was located. The simulation results indicate that the background particles were dominantly （~ electrons, and protons and alpha particles were the important heavy background particles. The performance of the multi-wire proportional chambers （MWPCs） depends not only on the background-particle intensity but also the current density, which was also given by the simulation code. Furthermore, the measures to suppress the background particles were also investigated with the simulation code.

关键词： fission fragments hyperon background particles Monte Carlo simulation

Study on gamma response function of EJ301 organic liquid scintillator with GEANT4 and FLUKA

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Chinese Physics C 2013年第12期37卷 65-70页

作者：张苏雅拉吐陈志强韩瑞刘星泉 R.Wada 林炜平靳增雪席印印刘建立石福东 Institute of Modern Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Lanzhou University Cyclotron Institute Texas A&M University College Station College of Nuclear Science and Technology Harbin Engineering University

The gamma response function is required for energy calibration of EJ301 （5 cm in diameter and 20 cm in height） organic liquid scintillator detector by means of gamma sources. The GEANT4 and FLUKA Monte Carlo simulation packages were used to simulate the response function of the detector for standard 22Na, 60Co, 137Cs gamma sources. The simulated results showed a good agreement with experimental data by incorporating the energy resolution function to simulation codes. The energy resolution and the position of the maximum Compton electron energy were obtained by comparing measured light output distribution with simulated one. The energy resolution of the detector varied from 21.2% to 12.4% for electrons in the energy region from 0.341 MeV to 1.12 MeV. The accurate position of the maximum Compton electron energy was determined at the position 81% of maximum height of Compton edges distribution. In addition, the relation of the electron energy calibration and the effective neutron detection thresholds were described in detail. The present results indicated that both packages were suited for studying the gamma response function of EJ301 detector.

关键词： gamma response function E J301 organic liquid scintillator energy calibration energy resolutionfunction GEANT4 FLUKA Compton edge

NE213探测器的中子探测效率模拟(英文)

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IMP & HIRFL Annual Report 2011年 210-210页

作者：席印印

One of the most widely used neutron detectors for fast neutron is the organic liquid scintillator NE213 (or BC501A). The physical characteristic of the NE213 scintillator, such as detection efficiencies, has been studied and is well known in detail for neutrons below 20 MeV nowadays[1]. It is essential to study the efficiency of NE213 detector at high energy.

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基于GEANT4的Clover探测器模拟研究

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基于GEANT4的Clover探测器模拟研究

中国核学会2011年学术年会

作者：刘辉兰宋玉收颜强席印印李磊哈尔滨工程大学核科学与技术学院

在放射性核的高自旋态、共振态的研究中,要获得高能量分辨的γ能谱,clover探测器阵列的使用成为首选。为了辅助实验中clover探测器的设置和布局及实验后的数据分析与评价,基于GEANT4对单个clover探测器进行了模拟计算。对不同能量γ射... 详细信息

在放射性核的高自旋态、共振态的研究中,要获得高能量分辨的γ能谱,clover探测器阵列的使用成为首选。为了辅助实验中clover探测器的设置和布局及实验后的数据分析与评价,基于GEANT4对单个clover探测器进行了模拟计算。对不同能量γ射线从不同角度入射等情况,对探测器的探测效率、峰总比进行了模拟。针对比较复杂的γ辐射场,为了提高γ谱的峰康比在模拟中尝试了在探测器前端添加准直构件,从而研究对最终探测效果的影响。为了检验模拟的结果的有效性,模拟数据与已有实验数据进行了对比,符合较好。模拟结果表明对于点源γ射线的入射角度对其探测效率影响不大,直接法和加和法探测效率随着入射γ光子的能量升高差别变大。

关键词： Clover探测器模拟 GEANT4 探测效率峰总比

中高能12C离子在类体液中三维能量沉积分布的模拟研究

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中高能12C离子在类体液中三维能量沉积分布的模拟研究

第十四届全国核物理大会暨第十届会员代表大会

作者：宋玉收颜强井田席印印刘辉兰哈尔滨工程大学核科学与技术学院

分别采用SRIM和Geant4模拟了中能(1MeV～200MeV)、高能(200MeV～10GeV)12C离子在类体液中的输运过程,得到类体液中12C离子在类体液中的三维能量沉积量分布。模拟结果显示,使用水模和使用类体液的结果相差不大。模拟过程中着重考虑了中... 详细信息

分别采用SRIM和Geant4模拟了中能(1MeV～200MeV)、高能(200MeV～10GeV)12C离子在类体液中的输运过程,得到类体液中12C离子在类体液中的三维能量沉积量分布。模拟结果显示,使用水模和使用类体液的结果相差不大。模拟过程中着重考虑了中高能区12C离子在径

关键词： 12C离子模拟三维能量沉积分布

209Bi(e,e’K+)207ΛPb反应中裂变碎片靶室中背景粒子的模拟分析

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209Bi(e,e’K+)207ΛPb反应中裂变碎片靶室中背景粒子的模拟分析

第十四届全国核物理大会暨第十届会员代表大会

作者：宋玉收刘辉兰席印印颜强胡碧涛哈尔滨工程大学核科学与技术学院兰州大学核科学与技术学院

托马斯杰斐逊国家实验室(Jlab)的实验E02-017使用1.8GeV的电子束流通过核反应209Bi(e,e’K+)207ΛPb测量了奇异粒子相关的裂变发生概率。由于高水平的背景粒子的干扰,

关键词：裂变碎片超核背景粒子蒙特卡罗

基于Windows API的CAMAC系统仿真

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基于Windows API的CAMAC系统仿真

中国核学会2011年学术年会

作者：李磊宋玉收席印印颜强刘辉兰李桃生哈尔滨工程大学核科学与技术学院

针对核物理实验中经常使用的CAMAC系统,介绍了一种基于Windows API的仿真设计方法。该方法以VisualStudio 2010为编程环境,运用C++面向对象编程思想,对CAMAC系统的界面、数据通道、命令操作及各功能模块插件等分别进行类函数编写,且调... 详细信息

针对核物理实验中经常使用的CAMAC系统,介绍了一种基于Windows API的仿真设计方法。该方法以VisualStudio 2010为编程环境,运用C++面向对象编程思想,对CAMAC系统的界面、数据通道、命令操作及各功能模块插件等分别进行类函数编写,且调用函数均为Windows API函数和自定义函数。运用该方法对ORTEC公司生产的放大器插件AMP—575A进行了仿真并测试了部分仿真模块的性能,通过虚拟核信号的测试可以证实该插件的仿真模块很好地完成了其物理功能。放大器插件的成功仿真说明该仿真方法能完成CAMAC系统的仿真设计。相比基于LabVIEW的仿真,该方法在编程方面有更大的灵活性且更接近系统的底层,为后期搭建基于CAMAC系统的虚拟设备平台摸索了道路。

关键词： Windows API CAMAC系统仿真放大器极零相消

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油墨黏度对胶印印刷质量的影响

包装工程 2013年第7期34卷 94-96,122页

作者：席瑛曹从军西安理工大学西安710048

通过分析胶印油墨黏度特性以及胶印过程剪切速率状态,并通过实验室测量油墨黏度,获得了油墨由橡皮滚筒向纸张转移过程的黏度。然后配比不同黏度的油墨上机印刷,得到了油墨黏度和印刷品实地密度、网点增大以及色度之间的关系,分析了油墨... 详细信息

通过分析胶印油墨黏度特性以及胶印过程剪切速率状态,并通过实验室测量油墨黏度,获得了油墨由橡皮滚筒向纸张转移过程的黏度。然后配比不同黏度的油墨上机印刷,得到了油墨黏度和印刷品实地密度、网点增大以及色度之间的关系,分析了油墨黏度对印刷质量参数影响的机理,为企业合理使用去黏剂提供依据。

关键词：油墨黏度实地密度网点增大色彩值