Bismuth-content-dependent polarized Raman spectrum of InPBi alloy

We systematically investigate the optical properties of the InP_(1-x)Bi_x ternary alloys with 0≤x≤2.46%,by using high resolution polarized Raman scattering measurement.Both InP-like and InBi-like optical vibration modes(LO) are identified in all the samples,suggesting that most of the Bi-atoms are incorporated into the lattice sites to substitute Patoms.And the intensity of the InBi-like Raman mode is positively proportional to the Bi-content.Linear red-shift of the InP-like longitudinal optical vibration mode is observed to be 1.1 cm~(-1)/Bi%,while that of the InP-like optical vibration overtone(2LO) is nearly doubled.In addition,through comparing the(XX) and Z(XY) Raman spectra,longitudinaloptical-plasmon-coupled(LOPC) modes are identified in all the samples,and their intensities are found to be proportional to the electron concentrations.     

并合不变中子质子产额比值角分布各向异性与对称能关系的研究

采用ImQMD05模型分析了非对称反应体系40Ar+197Au,124Sn在中低能区（E_beam=35~100 MeV/u）的半擦边反应的条件下的反应机制,并进一步探索了不同模型参数,如对称能斜率、碰撞参数等,对轻粒子并合不变中子质子产额之比角分布各向异性的影响。通过研究发现:对于出射动能大于每核子10 MeV的动力学出射的轻粒子而言,其并合不变的中子质子产额比值角分布各向异性与对称能的软硬具有明显的关联;碰撞参数对轻粒子动力学发射各向异性的影响最弱。By using the ImQMD05 code,we simulate the 40Ar+197Au,+124Sn at beam energy of 35,50 and 100 MeV/u and semi-peripheral collisions.The reaction mechanism,symmetry potential and Coulomb potential competition around the overlapped neck region and impact parameters effects are investigated for understanding the angular distribution of isospin contents of dynamical emitted light particles.Our results show that the angular anisotropy of the coalescence invariant neutron to proton yield ratios is sensitive to the stiffness of symmetry energy,especially for the dynamical emitted light particles with E_k>10 MeV.     

相干彩虹的形成机制

用一束白光激光聚焦照射液体(水、丙酮、无水乙醇、汽水等)或固体(冰、有色玻璃、塑料、彩色蜡等),出现了多级的彩色干涉环,即相干彩虹.高强度白光局部地加热了液体(固体),改变了它的密度(以及折射性质),从而导致光程差的出现,不同波长的光都发生干渉,形成了彩色的干涉环.有色玻璃在反射模式下也出现了相干彩虹,此时的干涉完全来自于玻璃表面轮廓的变化,并且无参数拟合的结果定量地符合观测到的干涉图案.     

EAST铰链式机械臂真空存储舱CASK系统研制

总体描述了EAST机械臂真空舱系统设计,介绍了实现进展情况。EAST铰链式机械臂是用于在不破坏EAST内部真空环境下对第一壁内部进行近距离观测、快速维修的一种检修工具。考虑到对EAST铰链式机械臂的存储、支撑以及工作条件,需要设计和制造出一个密封的真空舱系统。该系统可以在真空条件下通过一个直径为250mm的连接端口连接到EAST主体机构上。系统设计主要分为真空存储舱CASK腔体、真空系统以及烘烤系统三个部分。     

进气方式对冲击与气膜组合冷却效果的影响

通过数值模拟的方法,研究了涡轮叶片弦中区所采用的新型双层腔冷却结构的冷却特性,系统分析了冲击与气膜组合冷却的流动与换热特性,讨论了冷气进口雷诺数Re、吹风比M以及进气方式对组合冷却效果的影响.计算参数范围是:冷气进口雷诺数Re=2000～5000,吹风比M=0.6～2.0.计算结果表明:冷气进口雷诺数、吹风比以及冷气的进气方式对组合冷却效果均有很大影响.(1)冷气进口雷诺数越高、吹风比越大,组合冷却效果越好.(2)反向进气时的组合冷却效果明显好于正向进气时的组合冷却效果.     

双模板剂体系下层状镁碱沸石的合成研究

通过直接水热合成法在吡咯烷和四甲基氢氧化铵双模板剂体系下制备出具有层状薄片组成的球形镁碱沸石,并且考察了四甲基氢氧化铵加入量对镁碱沸石的结晶度、晶化曲线、晶体形貌、比表面和孔结构的影响,采用X射线衍射(XRD)、扫描电镜(SEM)、氮气吸附脱附等手段对合成样品进行分析表征.结果表明:随着四甲基氢氧化铵加入量的增加,其晶化过程逐渐延长,但最终得到的镁碱沸石相对结晶度无明显变化;四甲基氢氧化铵的加入可以显著改变镁碱沸石的晶体形貌、比表面和孔结构.     

在重核和超重原子核中量子混沌问题的研究

通过观察和分析重核和超重核中量子谱的统计性质 ,研究有限物理体系中量子混沌的一些问题 .介绍了原子核中量子谱显示的有序 -混沌现象随激发能变化的实验数据 ,研究了超重核体系中量子谱相邻能级间距分布的规则性随体系的依赖关系 ,并预言了稳定的超重体系 .给出了原子核有序混沌相变现象与原子核形变以及原子核转动的依赖关系 ,讨论了量子体系中的对效应对有序 -混沌相变的影响 .最后 ,用有序 -混沌相变的概念解释和理解了核物理中一些重要的实验现象. Some aspects of quantum chaos in a finite system had been studied based on the analysis of statistical behaviors of quantum spectra in heavy and superheavy nuclei. The dependence of the transition from order to chaos on nuclear deformation and nuclear rotatation had been described. The influence of pairing effect on the statistical properties of spectra is also discussed. Some important experiment phenomena in nuclear physics had been understood from the point of view of interplay...     

碘离子对烟草过氧化物酶Ⅰ(TOPⅠ)的荧光猝灭的研究

通过对碘离子(I-)与烟草过氧化物酶Ⅰ(TOPⅠ)作用前后的荧光光谱的分析, 并运用改良的Stern-Volmer方程处理数据; 计算得到I-离子与TOPⅠ上的色氨酸残基的结合位点数及结合常数, 讨论了它的荧光猝灭机制和色氨酸残基在TOPⅠ分子中的分布情况。     

对流_扩散问题的6节点三角形单元流线迎风有限元法和自适应网格重分技术

A streamline upwind finite element method using 6-node triangular element is presented. The method is applied to the convection term of the governing transport equation directly along local streamlines. Several convective-diffusion examples are used to evaluate efficiency of the method. Results show that the method is monotonic and does not produce any oscillation. In addition, an adaptive meshing technique is combined with the method to further increase accuracy of the solution, and at the same time, to minimize computational time and computer memory requirement.     

The Δ mass dependence of the M matrix and its influence on the NΔ→NN cross-sections

TheΔmass dependence of the M matrix and its influence on the NΔ→NN cross-sections are investigated in the one-boson exchange model.Our calculations show that theΔmass dependence of the momentum of the outgoingΔand the M matrix affects the calculations ofσNΔ→NN,especially around the threshold energy.