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35MeV/u40Ar+197Au反应中热核的统计发射研究

Statistical Emission of Hot Nuclei in the 35MeV/u40Ar +197Au Nuclear Reaction

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【作者】 魏志勇李祖玉柳永英段利敏吴和宇张保国王宏伟王素芳肖志刚卢朝晖靳根明诸永泰胡荣江朱海东

【Author】 WEI ZhiYong, LI ZuYu, LIU YongYing, DUAN LiMin, WU HeYu,ZHANG BaoGuo, WANG HongWei, WANG SuFang,XIAO ZhiGang, LU ZhaoHui, JIN GenMing, ZHU YongTai, HU RongJiang, ZHU HaiDong (Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000,

【机构】 中国科学院近代物理研究所!兰州730000中?

【摘要】 利用硅半导体+CsI(T1)闪烁体望远镜测量35MeV/u40Ar+197Au中发射的轻带电粒子,用能谱斜率方法和双同位素产额比方法提取了核温度参量.研究了热核发射过程中的统计发射规律.

【Abstract】 The statistical emission of the 35MeV/u 40Ar+ 197Au was studied. Several silicon △E1 + silicon △E2 + CsI(Tl) telescopes with good particle identification and lower energy thresholds were used to collect the experimental data. For the backward angle emission events, the slope nuclear temperature parameters and the isotope nuclear temperature parameters, which were extracted from the slope of energy spectra and double isotope yield ratios of the reaction products respectively, were nearly the same. The slope temperatures were slightly higher than the isotope temperatures. The reliability of the method to extract nuclear temperature has been discussed. For the backward angle events statistical emission is the dominant process, i. e. the particles emitted into backward angles mainly come from the equilibrium decay.

【关键词】 统计发射核温度热核
【Key words】 statistical emissionnuclear temperatureshot nuclei
【基金】 中国科学院留学回国人员基金;国家自然科学基金!(19505007);中国科学院“九五”重大项目!(KJ95T-03)支持
  • 【文献出处】 高能物理与核物理 ,High Energh Physics and Nuclear Physics , 编辑部邮箱 ,2000年12期
  • 【分类号】O572
  • 【被引频次】2
  • 【下载频次】17
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