Elastic recoil detection technique with high depth resolution has been developed at the hi - 13 tandem accelerator of ciae . with high quality beam which was used for bombarding target , the recoils were detected with q3d magnetic spectrometer following a focal plane detector and a ae - e telescope detector with longitudinal double - room ionization chamber 该系统用高质量的重离子束轰击薄膜或块材靶样品，利用q3d磁谱仪及其焦面探测器和纵向型双电离室e ? e望远镜探测器两套探测系统，在前角区测量了靶中各种元素的反冲能谱。
