关键词: 
弹核碎裂 /
重离子肿瘤治疗 /
¹²C⁶⁺碎片测量

摘要: 为了评估弹核碎裂反应在碳离子肿瘤治疗中产生的影响，中国科学院近代物理研究所建立了一套探测器系统用来测量相关反应产物。这套探测系统包括起始探测器、水靶系统、带电粒子鉴别系统和中子测量系统。利用中国科学院近代物理研究所250 MeV/u ¹²C⁶⁺ 束打50 mm水靶的实验在束测试了这套系统的性能。实验结果表明，通过ΔE-E 和TOF-ΔE 两种粒子鉴别方法这套探测系统清楚地区分了H，He，Li，Be，B和C 等元素。通过计算不同Z 值带电碎片的微分截面得到了这些带电碎片(本工作给出元素H 和He)相应的角分布。这套探测系统中的带电粒子测量系统性能达到了设计的预期目标。For estimating the influence of the projectile breakup reaction on carbon ion tumour therapy, a detector system was built by IMP(Institute of Modern Physics), Chinese Academy of Sciences(CAS), and used to detect the results of the reaction. The system is composed of start detector, water target system, charged fragments detector system and neutron detector system. The performance of the detector system was tested in the experiment of 5 cm thick water target bombarded by 250 MeV/u carbon beam. The results reveal that the charged fragments, such as elements H, He, Li, Be, B and C, were identified clearly by ΔE-E and ΔE-TOF techniques. The angular distributions of some charged fragments were obtained by calculating the charge-changing cross-sections of the fragments(e.g. elements H and He isotopes in our work). The test results prove that the charged fragment detector system achieves the design aim.