46．7MeV／u^（12）C轰击^（197）Au、^（115）In、^（58）  

Complex Fragments Emitted in Reactions of 46.7MeV/u￣(12)C on ￣(197)Au,￣(115)In and ￣(58)Ni

作　　者：尹淑芝[1] 诸永泰[1] 詹文龙[1] 郭忠言[1] 胡晓庆[1] 郗鸿飞[1] 刘冠华[1] 周建群[1] 范恩杰[1] 冯恩普[1] 王晓秋[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《高能物理与核物理》1994年第8期673-679,共7页High Energy Physics and Nuclear Physics

摘　　要：用气体电离室－半导体位置灵敏探测器望远镜测量了４６．７ＭｅＶ／ｕ（１２）Ｃ离子轰击（１９７）Ａｕ，（１１５）Ｉｎ，（５８）Ｎｉ靶时，在大角区发射的从Ｌｉ到Ｍｇ的复杂碎片能谱；由各碎片的能谱提取了蒸发源的温度和碎片发射的最可几动能Ｅｐ，并与＝Ｖｃｏｕｌ＋２Ｔ计算的平均动能进行了比较，发现实验上提取的最可几动能Ｅｐ总是低于计算的．用Ａ．Ｆｒｉｅｄｍａｎ简单的统计公式对复杂碎片的产额进行粗糙拟合，拟合结果令人满意．Energy spectra of complex fragments emitted in the reactions of 46.7MeV/u 12Cwith different targets 197Au,115In and 58NI have been measured by telescopes,consisting of a gis ionization counter followed by a position Sensitive semiconductor detector.Tha most probable kinematical energies.Ep of complex fragments and temperature parameters of long-live intermediate systems have been deduced by complex fragment ernergy spectra.The experimental values of Ep are lower than the calculated ones by E=Vcoul+2T.The experimental values of complex fragment yields can be reproduced by simple A.Friedman statistical evaporation model satisfactorily.

关 键 词：核反应 碎片产额 统计模型 金197 

分 类 号：O571.4[理学—粒子物理与原子核物理]