Research on 1.6-GeV proton translation process using Geant4

YAO Zhiming; SONG Guzhou; HEI Dongwei; MA Jiming; ZHOU Ming; DUAN Baojun; SONG Yan; HAN Changcai

doi:10.11889/j.0253-3219.2014.hjs.37.030205

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Research on 1.6-GeV proton translation process using Geant4

更新时间：2021-03-03

- Research on 1.6-GeV proton translation process using Geant4
- NUCLEAR TECHNIQUES Vol. 37, Issue 3, Article number: 030205(2014)
- 作者机构：
  
  西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安,710024
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.030205
  CLC：
- Published：14 March 2014
- 稿件说明：
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YAO Zhiming, SONG Guzhou, HEI Dongwei, et al. Research on 1.6-GeV proton translation process using Geant4[J]. Nuclear techniques, 2014, 37(3): 030205
DOI：

YAO Zhiming, SONG Guzhou, HEI Dongwei, et al. Research on 1.6-GeV proton translation process using Geant4[J]. Nuclear techniques, 2014, 37(3): 030205 DOI： 10.11889/j.0253-3219.2014.hjs.37.030205.

摘要

高能质子具有较强的穿透能力，可以透射物体形成图像。为了理清质子透射物体的物理过程，通过Geant4蒙特卡洛软件模拟了1.6 GeV能量的质子在材料中的输运过程。通过设置模拟程序中的物理模型，对质子与物质的四种相互作用分别进行了模拟计算。计算结果表明，个数衰减、能量损失和散射角分布都可以反映被检测物体的面密度和材料组分的信息。

Abstract

Backgroud: Chinese Spallation Neutron Source under construction consists of a proton accelerator which can speed up protons to 1.6 GeV. High-energy proton beams are used for radiography due to their high penetrability. Purpose: In order to understand how protons interact with materials when transmitting an object

the transport process of 1.6-GeV protons in different materials is simulated by Geant4. Methods: Energy loss

multiple coulomb scattering

inelastic and elastic collisions with nucleus are simulated independently by setting the physics process in Geant4. Beryllium

copper and tungsten are chosen as low-Z

middle-Z and high-Z material respectively. With respect to the effect of thickness

Tungsten of 5 g?cm?2

10 g?cm?2 and 15 g?cm?2 is chosen as the material. Results: Number

energy and direction of motion are changed after protons penetrate an object. Changes are related to the composition and thickness of materials. Conclusion: The simulation results imply that transmission

energy-loss and distribution of scattering angle can reflect the thickness (in g?cm?2) and material composition of an object.Cited

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