^(18)O离子轰击厚靶的中子剂量学参数  

Neutron dosimetry parameters for ^(18)O-ion on thick targets

作　　者：李桂生[1] 张天梅[1] 李宗伟[1] 苏有武[1] 张树民[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《核技术》2000年第12期856-862,共7页Nuclear Techniques

基　　金：国家自然科学基金(19575053)

摘　　要：用阈探测器活化法测量了每个核子动能（简称单核能）为５０ＭｅＶ１８Ｏ离子轰击厚靶（Ｂｅ、Ｃｕ、 Ａｕ）时出射中子的能量分布、注量率分布和中子角分布，得到了１８Ｏ离子的中子产额、前向中子发射率和中子剂量当量率分布的数据。并与国外报道的单核能在２０ＭｅＶ 以下的低能重离子轰击厚靶研究中得到的中子剂量学参数进行了比较和分析。Neutron energy, fluence rate, angular distributions and dose equivalent rate distributions around thick Be, Cu, An targets bombarded by 50MeV/u 18O-ion were measured by using a threshold detector activation method. The neutron yields and emission rates in the forward direction were obtained. The measured results were compared with the results obtained in low energy heavy ion studies.

关 键 词：^(18)O离子 厚靶 中子剂量学参数 中子产额 剂量当量率 

分 类 号：TL84[核科学技术—核技术及应用] R144.1[医药卫生—公共卫生与预防医学]