A method for the measurement of elastic scattering angular distribution at HIRFL-RIBLL
A method for the measurement of elastic scattering angular distribution at HIRFL-RIBLL
复制标题
DOI：
10.1016/j.nima.2012.10.088
复制
发表时间：
2013-02
影响因子：
1.4
通讯作者：
Y. Yang;J. Wang;Q. Wang;J. Ma;Mei Huang;Jianlong Han;P. Ma;S. Jin;Z. Bai;Q. Hu
中科院分区：
文献类型：
--
作者：
Y. Yang;J. Wang;Q. Wang;J. Ma;Mei Huang;Jianlong Han;P. Ma;S. Jin;Z. Bai;Q. Hu
介绍了在兰州重离子加速器（HIRFL）的兰州放射性离子束线（RIBLL）上测量放射性离子束（RIBs）引起的重离子弹性散射微分截面的方法。利用大面积探测器、两个双极板雪崩计数器（PPAC）、两个双面硅条探测器（DSSD）望远镜，结合蒙特卡罗模拟，克服了RIBs的宽光束轮廓和有限强度的缺点。PPAC用于确定束粒子的方向和位置。DSSD望远镜用于测量散射粒子。通过假设非常向前的角度处的纯卢瑟福散射，对探测器的未对准和数据归一化进行了小的校正。该方法适用于中、低能重靶散射截面的测量，并已成功地应用于Elab=17.9MeV/u的~ 7 Be在Pb靶上弹性散射角分布的测量。
A method is presented for the measurement of differential cross-sections of heavy ion elastic scattering induced by Radioactive Ion Beams (RIBs) on the Radioactive Ion Beam Line in Lanzhou (RIBLL) at the Heavy-Ion Research Facility in Lanzhou (HIRFL). The disadvantages of broad beam profiles and limited intensities of the RIBs were overcome using large area detectors, two Parallel-Plate Avalanche Counters (PPACs), two double-sided silicon strip detector (DSSD) telescopes, incorporated with Monte Carlo simulations. The PPACs were used to determine the direction and position of the beam particles. The DSSD telescopes were used to measure scattered particles. Small corrections for the misalignment of detectors and the data normalization were made by assuming the pure Rutherford scattering at very forward angles. The method is suitable for the measurement of the cross-sections on heavy targets at low and intermediate energies, and it has been successfully applied to measure the angular distribution of elastic scattering of7Be on Pb target at Elab=17.9MeV/u.