原子核放射性对核对称能的约束（英文）

核对称能的密度依赖性对于原子核物理和天体物理中的许多问题很重要。基于密度依赖的结团模型,奇特的结团放射性被用来约束核对称能及其斜率的大小。在密度依赖的结团模型中,清楚地给出了结团放射性子核208Pb的中子皮大小与对称能的斜率参数L（ρ0） 之间的关联。发现从M3Y核子-核子相互作用得到的结团-208Pb 同位旋矢量势对于对称能的斜率参数L（ρ0） 非常重要。基于结团放射性实验数据和新的208Pb 的中子皮大小实验数据,成功得到对称能的斜率参数L（ρ0） 的大小。也讨论了利用质子放射性数据提取的斜率参数L（ρ0）。The density-dependence of symmetry energy is of particular importance to many problems in nuclear physics and astrophysics. Exotic cluster radioactivity is proposed to constrain the density slope of symmetry energy L(ρ0) by using the density-dependent cluster model (DDCM) where the cluster radioactivity serves as a link between the neutron skin thickness of 208Pb and the density slope L(ρ0). The isovector part of cluster-208Pb potential constructed from the M3Y nucleon-nucleon interaction is found to be very important in determining the density slope parameter L(ρ0). The correlation between the neutron skin thickness of 208Pb and the density slope parameter are obtained from cluster radioactivities around 208Pb with measured data. The constraint of L(ρ0) from proton radioactivity is also discussed.     

回旋加速器束测探头感生放射性实验研究

基于束流沉积法测量回旋加速器内部束流参数将在束测探头上产生感生放射性污染,从而对加速器调束工作人员带来不必要的辐射危害。采用AGM-6型监测仪对探头感生放射性进行在线测量,通过测量不同半径处探头受辐射后的空气比释动能率,间接反映探头感生放射性的强弱和危害。研究结果表明,在束流调试实验中,应尽量降低馈入高频的占空比;探头测量后冷却2~3 h取出,则不需要考虑测量探头辐照后的残留感生放射性的危害。     

黑匣子与核武器

 ○从戈尔巴乔夫辞职谈起○黑匣子到底是干什么的?○哪些核武器由黑匣子控制?○黑匣子会《失控》吗?     

长寿命核废物嬗变处理的研究综述

介绍了长寿命高放核废物的中子嬗变原理及各国在该领域的发展动态．中子嬗变问题的提出及研究工作的发展已有二十多年的历史．自从９０年代以来该领域非常活跃,国际会议也比较频繁．此外,还介绍了我国在该领域内的发展态势及今后工作的展望． The fundamentals of transmutation of long-lived nuclear power radiowaste and the development aspects of different countries in this field are presented.There have been more than twenty years′history since the first work comes out and the field appears very ac tive after nineties.The situation of China and future prospects in the field are also introduced.     

Thermal Spike Model Description of Swift Heavy Ion Irradiated Polyimide

To describe the role of electronic energy loss (dE/dX)e for chemical modification of polyimide (PI), multi layer stacks (corresponding to different dE/dX) were irradiated by different swift heavy ions (1.158 GeV ^56Fe and 1.755 GeV ^136Xe) under vacuum and at room temperature at the irradiation terminal of HIRFL. Chemical changes of modified PI films were studied by Fourier transformed infrared (FTIR) spectra measured with a Perkin Elmer Soectrum GX in a transmission mode.     

Defect Structures in 4H-SiC Irradiated with Highly-energetic ^20Ne^4＋ and ^120Xe^26＋ Ions

The study of damage evolution in silicon carbide bombarded with energetic helium ions is important for the use of this material in future fusion reactors. Heavier inert gas atoms like Ne and Xe have similar behavior of diffusion and clustering with helium, and the comparison of damage accumulation behavior between energetic helium and heavier inert gas ions can reveal important aspects of underlying mechanisms. As an extension of our