用于开展几倍库仑势垒能区放射性核束直接核反应实验的探测系统的设计与模拟

Design and Simulation of a Detection System for Conducting Nuclear Radioactive Ion Beam Direct Reaction Experiment in Several Times the Coulomb Barrier Energy Region

摘要: 基于放射性核束物理的研究需求以及兰州重离子加速器国家实验室兰州放射性束流线(HIRFL-RIBLL1)的实际情况，本工作设计了一套高效率的带电粒子探测系统。该系统由6套探测模块组成，每套探测模块均为DSSD+PSD+CsI(Tl)三层结构。利用Geant4模拟给出了整套探测系统的几何效率，得到了探测系统的最佳设计方案，之后模拟完成了E_\rm lab=125 MeV的^7\rm Be在^208\rm Pb靶上的弹性散射和破裂反应实验，并对模拟实验结果进行数据分析得到了弹性散射和破裂反应事件的统计分布。

Abstract: The detection system designed in this paper is a set of high-efficiency detector system based on the research requirements of the Radioactive Ion Beams physics and the Radioactive Ion Beam Line in Lanzhou(RIBLL) at the Heavy Ion Research Facility in Lanzhou(HIRFL). The detector system consists of six sets of telescopes, each composed of a three-layer structure DSSD+PSD+CSI(Tl). After using Geant4 simulation to obtain the geometric efficiency, the best design of the detection system is given. Then the elastic scattering and breakup reactions of ^7\rmBe on the ^208 \rmPb target with E_\rm lab=125 MeV have been simulated. The statistical distributions of the elastic scattering and breakup events were obtained.