基于CR-39固体探测器的粒子识别  

Particle identification using CR-39 solid state nuclear track detector

作　　者：徐秀清[1,2] 夏晓彬 李洋[3] 蔡军 陈畅其[1,2] 黄文博 谢桂英[1] 高崚威 XU Xiuqing;XIA Xiaobin;LI Yang;CAI Jun;CHEN Changqi;HUANG Wenbo;XIE Guiying;GAO Lingwei(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beo＇ing 100049,China;Tong]i Hospital of Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049 [3]华中科技大学同济医学院附属同济医院,武汉430030

出　　处：《辐射研究与辐射工艺学报》2018年第4期36-45,共10页Journal of Radiation Research and Radiation Processing

基　　金：中国科学院战略性先导科技专项(XDA02050100)资助~~

摘　　要：为了掌握利用CR-39固体核径迹探测器识别α粒子和质子的方法,应用粒子与物质相互作用理论和径迹蚀刻动力学经验模型,模拟了α粒子和质子在CR-39固体核径迹探测器上的径迹形貌,计算出了3~8 MeV的α粒子和1~9 MeV的质子最佳蚀刻条件。根据对应的最佳蚀刻条件,计算获得的α粒子和质子的径迹直径、灰度值、径迹深度,并据此对相同能量的α粒子和质子、不同能量的α粒子、不同能量的质子进行识别。同时,采用CR-39固体探测器对α粒子(5.48 MeV)和质子(3 MeV)进行了实验测量,在模拟计算所获得的最佳蚀刻条件下,实验测读了α粒子径迹。实验测量得到的α粒子径迹直径与模拟值相差0.36%~9.70%。实验测量的最佳蚀刻时间和模拟的最佳蚀刻时间相差5.60%,这些结果验证了模拟方法的可行性。To identify α-particles and protons using CR-39 solid state nuclear track detector（CR-39 SSNTD）, track growth model and interaction theory between particles and media were applied and the profile and appearance of the tracks produced by α-particles and protons on the CR-39 SSNTD were simulated. In addition, the optimal chemical etching conditions for 3～8 MeV α-particles and 1～9 MeV protons were calculated. The corresponding diameters, depths and the gray level values of the tracks for the optimal chemical etching conditions were simulated to identify the α-particles and protons with the same energy and different energies. To verify the simulation method, a CR-39 SSNTD was used to measure the tracks made by 5.84 MeV α-particles and 3 MeV protons. The differences between the experimental and simulated diameters of the tracks ranged between 0.36%～9.70%. For the optimal etching conditions obtained from simulation, a difference of 5.6% was observed between the experimental and simulated chemical etching time. These results are preliminary proof of the feasibility and validity of the simulation method.

关 键 词：CR-39 固体核径迹探测器 蚀刻条件 Α粒子 质子 

分 类 号：TL815.7[核科学技术—核技术及应用]