同位旋标度与对称能

简要地评论了同位旋标度率分析的现状以及从中提取的对称能的信息. 首先提出了激发核的次级衰变对同位旋标度系数的影响, 然后提出了对称能对激发能的依赖性, 最后讨论了对称能对密度的依赖性.     

介质中的核子-孩子碰撞截面及其对原子核反应总截面的影响

给出了一个在较大能量范围内描述介质中核子－核子碰撞截面的计算公式，并结合微观修正的Ｇｌａｕｂｅｒ模型，研究了介质效应对原子核反应总截面的影响。     

中能重离子核反应的碎裂、集体流和其同位旋效应

本文总结了中能重离子核反应的一般特征及热核反应与衰变过程的动力学、热力学和化学 (同位旋组分 )效应。尤其是 ,综合了作者在当前中能重离子核物理研究热点 ,如多重碎裂、“颈”发射、集体流及其同位旋物理等这些方面的系统性工作 ,作了较为完整深入的介绍 ,最后我们还对当前中能重离子核物理的发展前景作了扼要的介绍。     

超声波处理高序石墨合成碳纳米结构

用超声波处理水溶液中的高序石墨固体,借助于高分辨透射电子显微镜和电子衍射,不但看到了与电弧放电和激光烧蚀产物相似的碳纳米多面体和纳米管,而且还发现了一种罕见的实心碳纳米球.对这种由扰动石墨晶格组成物的形成过程给出一种可能的模型解释 关键词： 高序石墨 超声波处理 碳纳米结构     

Transmutation of nuclear wastes using photonuclear reactions triggered by Compton backscattering photons at the Shanghai laser electron gamma source

Based on the facility of the Shanghai Laser Electron Gamma Source (SLEGS), the transmutation for nuclear wastes such as ¹³⁷Cs and ¹²⁹I is investigated. It is found that nuclear waste can be transmuted efficiently via photonuclear reaction triggered by gamma photons generated from Compton backscattering between CO₂ laser photons and 3.5 GeV electrons. The nuclear activities of ¹³⁷Cs and ¹²⁹I are evaluated and compared with the results of transmutation triggered by bremsstrahlung gamma photons driven by ultra intense laser. Due to the better character of gamma photon spectrum as well as the high brightness of gamma photons, the transmutation rate of Compton backscattering method is much higher than that of the bremsstrahlung method.     

Particle correlation in p+p collision √sNN=200 GeV in PYTHIA

We calculated the relative abundances of charge hadron, K_S⁰, Λ and Λ in the near-side and away-side cones correlated with triggered high p_T particles in minimum bias in p+p collisions at √s_NN=200 GeV in the PYTHIA model. From the quark and gluon jet events in the PYTHIA model, we have found that the particle yields' different splitting. So the di-hadron correlation in the quark jet events and gluon jet events are also presented. And the particle charge dependance of the di-hadron correlation is extracted from the PYTHIA model. The di-hadron plus and di-hadron minus correlations are similar in the near-side (Δφ~0), but in the away-side, the di-hadron minus correlation seems to be lower. The Hadron-K_S⁰ and －Λ+Λ correlations seem to be differet. We have used a double-Gaussian function to fit those correlation functions and compared the fit parameters.     

Structure study of light unbound nuclei near drip line

Some experimental techniques and theoretical analysis on unbound nuclei structure study are briefly introduced in this article. The unbound nuclei structure investigation can inspect the reliability of theoretical calculation, and is also important to extend the modern nuclear structure model to exotic nuclear regions. With the recent development of radioactive Ion Beam (RIB) facility and some new experimental methods, the structure of unbound nuclei near drip line can be studied in experiment.     

用动力学模型计算10.6MeV/u~(84)Kr(~(27)Al,准裂变)反应的裂变时间

用单体耗散模型对１０．６ＭｅＶ／ｕ８４Ｋｒ在２７Ａｌ上引起的准裂变反应进行了计算，结果表明该准裂变反应的准裂变时间大于２００×１０－２２ｓ．发现对本反应系统，准裂变的出现至少需要８ＭｅＶ／ｕ阈能     

原子核高K同质异能态的诱发γ辐射

介绍了原子核高K同质异能态潜在的应用价值及国内外研究的进展。 总结了形成同质异能态的3种主要物理机制。 说明了高K同质异能态的应用原理是将其激发到更高的不稳定的K混合态上, 再发生诱发退激, 形成γ瀑, 释放其存储的能量。 同时又介绍了K混合态的3种主要产生机制。 最后分析了178Hfm2诱发退变的实验, 讨论了这些实验的区别和与角动量投影壳模型计算结果的差异。The nuclear isomer states have great potential value of application. The important experimental and theoretical researches are presented here. There are three kinds of physics mechanism for the formation of the isomer states. The principle of releasing the energy stored in the isomer is to excite it to higher states, K mixing states, which can spontaneously decay to the ground state forming the γ cascade. After introducting the three ways to form the K mixing states, we analyzed experiments on the most prospective isomer 178Hfm2, discussed the key differences between these experiments and suggested that the Projected Shell Model (PSM) can be helpful to confirm the occurrence of the  K mixing states and would work out characteristics of the induced decay.     

利用BUU模型研究11Li的核反应总截面和双中子剥去截面

发展了BUU模型,能够同时研究双中子晕结构核¹¹Li引起反应的核反应总截面和双中子剥去截面,计算中使用软的核物质状态方程和0.8倍的核子–核子碰撞截面,同时还用相对论平均场模型计算的中子和质子密度代替通常使用的方密度分布,计算结果可以很好地拟合不同反应系统的实验数据,假定对于晕核及其核芯核,彼此的核反应总截面与相互作用截面之间的差别相同,那么¹¹Li的双中子剥去截面可以表示成”Li及其核芯核⁹Li引起反应的核反应总截面之差,研究结果表明这一假定可以适用于高能,对于中能核反应需要更多的实验数据来检验.