超重核充气谱仪装置  

Gas-Filled Recoil Separator for Super-Heavy Nuclei

作　　者：张志远[1,2] 甘再国[1] 黄明辉[1] 黄天衡[1] 马龙[1] 马飞[1] 郑勇[1] 周小红[1] 徐瑚珊[1] 詹文龙[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《原子能科学技术》2011年第10期1262-1265,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10875152;10947118;10825522;10925526);国家基础研究项目资助(2007CB815001;0903010YKF);西部之光博士科研启动项目资助(0903130XBB)

摘　　要：介绍在兰州重离子研究装置(HIRFL)上新建的一台用于超重核实验研究的充气谱仪装置,描述该装置的基本结构及设计参数。利用已知截面的反应175 Lu(40 Ar,4～5n)211,210 Ac测试谱仪的性能,得到余核在不同He气气压下的电荷态分布,其平衡电荷态测量值与经验公式计算值符合较好。对于该反应,此实验条件下充气谱仪对余核的传输效率下限为14%。A new gas-filled recoil separator in HIRFL was introduced,which was dedicated to studies of the super-heavy nuclei.The configuration and technical parameters of the facility were described in detail.By using the complete fusion-evaporation reaction ^175Lu（^40Ar,4-5n）^211,210Ac,the charge state distributions of evaporation residues in helium gas were measured at the different pressures.Experimental equilibrium charge states in the present work were deduced,which were well coincided with the calculation of empirical formula.The transmission of the separator for Ac is 14% which should be considered as a lower limit.

关 键 词：超重核 充气谱仪 平衡电荷态 传输效率 

分 类 号：TL8[核科学技术—核技术及应用]