原子受激态的Stokes参数分析

根据密度矩阵理论,导出了受激原子态P态密度矩阵元和P态退激辐射的光子密度矩阵元的Stokes参数,它们之间存在一种非常简单直接的关系,说明在电子-光子符合散射实验中,通过测量光子的Stokes参数,就可以描述受激P态电荷云分布和散射过程的动力学。According to the density matrix theory, the density matrix of photon emitted from excited atom P state and of P state were introdued in this paper. There were a simple direct relation between the two density matrices, which shows that the electron cloud shape of excited atomic state and scattering dynamics can be described through the observable Stokes parameters of photon in electron-photon coincidence experiment.     

C/O能谱测井非弹谱的解析方法软件及应用

报道了快中子非弹性散射γ能谱测井, 非弹γ谱的新解析方法软件及应用. 新的解析方法包括:以标准非弹γ谱为基础, 对用NaI(Tl)探测器记录的256道地层非弹γ谱, 作定量解析, 求出各主要元素产额的方法; 以及求新的C/O和Ca/Si比的方法. 可同时求出三种C/O和Ca/Si比值, 即碳氧产额比、 重量百分含量比和原子比;钙硅比也如此. 所设计的软件功能强, 对于孔隙度为35％、 100％油饱和砂岩地层与100％水饱和砂岩地层（刻度井模型地层）, 碳氧原子比之差值>0.33, C/O测井油水差值提高了60％以上, 并求得了地层的含油饱和度. 取得了国内首创和领先的成果. In this paper, the new analyzing method & software and applications of enelactic spectra from Carbon/oxygen spectrometry log is reported. It were included that enelastic Gamma ray spectra(256 channels)of the formations by NaI(Tl) detector were analyzed quantitatively based on standard enelastic spectra, the methods which the ratio of elements yields and new ratio of C to O & of Ca to Si, the ratio of yield of C to O and the ratio of weight percent of C to O and the ratio of atoms C to O were found, and the corresponding ratio of Ca to Si were found simultaneously in new analyzing method. The difference value of the ratio of atoms C to O is greater than 0. 33 between 100% oil saturation and 100% water saturation in sandstone formation for porosity is thirty fife percent. The difference value between oil and water increase by a factor of 60%. In addition oil saturations curves changed with the depth were computed.     

含甲氧基偶氮苯液晶基元超分子的相行为研究

氢键是分子聚集和识别过程中的重要相互作用,利用分子间氢键,可设计并制备各种超分子体系材料,1989年,Kato等报道了吡啶基和羧酸基通过分子间氢键相互作用形成扩展液晶基元,得到了液晶稳定性增强的超分子液晶复合体系及侧链超分子液晶聚合物;同时,Lehn等报道了带脲嘧啶基和2,6-二酰胺吡啶基两种互补官能团的分子通过三重氢键缔合形成的主链超分子液晶。从此,迅速而广泛的开展利用氢键组装的超分子液晶体系的研究,并已组装合成出低分子型、     

半导体光放大器中非简并四波混频效应的理论分析

对半导体光放大器有源区中的非简并四波混频(NDFWM)过程的几种主要物理机制进行了理论分析与数值计算.由载流子速率方程、密度矩阵方程及非线性波动方程出发,分别考虑产生NDFWM效应的三个主要的物理过程：载流子浓度调制(CDP),载流子热效应(CH)及光谱烧孔效应(SHB),理论推导得其各自相应的非线性耦合波方程组,并将三种物理机制对NDFWM的贡献进行了比较,同时还讨论了线宽增强因子对NDFWM的转换效率的影响. 关键词：     

GCP Code and Analysis of J/ψ Suppression in p-A and A-A Collisions

Using the General Cascade Program (GCP), the production and absorption of J/ψ,in p-A and A-A collisions have been studied. Nucleon absorption mechanism and comoverabsorption mechanism are considered to investigate the J/ψ suppression. The results agreewell with experimental data of J/ψ production, escept for the data in Pb-Pb collision.     

High-Lying Vibrational Spectrum of Ammonia via Nonlinear Quantum Theory

We introduce a simple three-parameter model in nonlinear quantum theory-the discrete self-trapping equation to describe the stretching spectrum of ammonia at highlying vibrational states. The model calculations appear to describe the data well. These results obtained are conducive to researching the quantum chaotic manner and the multiphoton processes and isotope separation by multiphoton dissociation of ammonia molecular system.     

Highly Multiplexed Capillary Electrophoresis:Going Beyond DNA Analysis

Capillary electrophoresis (CE) is now a mature technique for analytical separations. In its various modes, impressive performance has been demonstrated for ionic as well as for neutral compounds. The Human Genome Project provided the impetus for developing multiple capillary systems.     

F-对沸石分子筛双四元环影响的量子化学计算

采用PM3量子化学计算方法研究了沸石分子筛及无机微孔晶体结构中双四元环内含F^-及不含F^-的8种模型簇的几何结构、电子结构以及稳定性,考察了F^-对双四元环结构和性质的影响,发现F^-的存在依次增强了纯硅、磷铝和磷镓双四元环的稳定性,而降低了硅铝的稳定性,F^-在双四元环中所处位置的计算值与实验晶体数据基本吻合.     

在温和条件下巨磁阻材料La0.5Ba0.5MnO3的水热合成与表征

报道了在温和条件下巨磁阻材料La_0.5Ba_0.5MnO₃的水热合成.系统地研究了原料配比、碱度、时间和温度对产物合成的影响,在最佳合成条件下得到了结晶度较高的纯相,并通过XRD、DTA-TG、化学分析及碘量法对产物进行了表征.该化合物属立方晶系,晶胞参数为α=0.3913nm,V=0.05990nm₃,Mn的平均价态为3.5,在1T的外磁场下,磁阻比(MR)的极大值为29%.     

Molecular Design and Property Prediction of High Density 4-Nitro-5-(5-nitro-1,2,4-triazol-3-yl)-2H-1,2,3-triazolate Derivatives as the Potential High Energy Explosives

To search for potential energetic materials with large energy density and acceptable thermodyna-mics and kinetics stability,twelve derivatives of 4-nitro-5-(5-n...