TATB钝感炸药的小角X射线散射实验

在北京同步辐射装置上应用同步辐射X射线小角散射技术研究TATB样品微孔状况，分析了微孔结构参数的变化。采用不同制备工艺(机械研磨、化学合成、气流细化、全结晶、粉碎)和不同存放时间的TATB粉末样品共计7份。     

Spectral Anomalies in the Fraunhofer Diffraction Pattern

We study the spectral characteristics theoretically and experimentally in the Fraunhofer diffraction pattern formed by the diffraction of a spatially coherent, polychromatic light through a slit. It is found that the spectrum in some diffraction directions close to the singular direction is redshifted, compared to the spectrum of the incident polychromatic light, and blueshifted in other directions, and splits into two lines at the singular direction. We show that the experimental results are consistent with the theoretical expectations.     

过渡金属表面γ-氨丙基三甲氧基硅烷膜的研究

本文对在过渡金属铁、镍电极表面制备得到的γ-氨丙基三甲氧基硅烷(γ-APS)膜进行了研究。实验中对硅烷膜用X-射线光电子能谱(XPS)、现场表面增强拉曼散射光谱(SERS)和原子力显微镜(AFM)进行了表征。X-射线光电子能谱(XPS)的结果发现存在两个N1s峰,表明γ-APS膜中的氨基有两种存在方式:自由氨基和质子化氨基。实验中还发现现场表面增强拉曼散射光谱(SERS)是研究金属/γ-APS体系中界面层结构非常有效的手段,SERS结果表明硅醇羟基和氨基发生了竞争吸附,且γ-APS分子在外加电位等条件的影响下吸附状态会发生一定变化。原子力显微镜(AFM)的表征结果在微观上显示电极表面的γ-APS膜上形成了一种较规则的微孔结构,这种结构可能与基底的性质有关。     

Synthesis of 2-(α-Hydroxyalkyl)-2-Oxazoline under Microwave Irradiation in Bluk

Oxazolineshavedemonstratedwideutilityinvariouschemicalfields,suchasinasymmetricsynthesis,asaco ordinationligand ,inmedicinalandmacromolecularsynthesis ,andasaprotectinggroupofcarboxylicacids[1～ 3] .Variousmethodshavebeenadvancedforthepreparationof 2 oxazolinesfromthereactionofβ aminoalcoholswithcarboxylicacids,esters,nitriles ,oraldehydessinceitsappearance[1～3] .Reagentssuchascomplexesorstrongacidsorbaseswereusuallyneededinthesevarioussyntheticmethods.Thereactiontakeslongtimetocompletion .…     

滤片-XRD探测系统响应时间测量

 研究了软X射线能谱仪探测道系统(系统包括X射线二极管（XRD）、SUJ-50-10电缆和不同频带示波器)的响应时间。实验利用上海激光联合实验室的20TW激光器激光(激光能量约20J，脉冲宽度约1ps)打金箔靶产生的X光，用XRD探测系统测量，记录示波器有TK684C，TK694C和WM8500等。将实验数据进行了线性拟合和比对分析。滤片XRD探测系统的响应时间随偏压升高而加快，随传输电缆长度的增加而变慢，因此测量快信号过程时，应提高探测器偏压，缩短传输电缆，选择宽频带高采样率示波器，以便减少系统的响应时间，减小信号失真程度。     

利用普通视频CCD作为紫外激光和软X射线探测器的研究

 介绍了利用价格便宜的普通视频CCD来获取紫外激光和软X射线图像的方法和应用结果，以代替价格昂贵的紫外CCD、使用不方便的X光胶片或者昂贵的X光CCD，其关键点是：（1）去除CCD相机的自动增益校正；（2）将相机的校正系数γ值设置为1；（3）去除CCD相机前面的保护窗。作为一种简易的装置，可以用于紫外激光测量及激光与等离子体相互作用研究。结果表明，采用改造后的普通视频CCD测量紫外激光光斑，准确可靠，其灵敏度比科学级紫外CCD的低一个量级，它还可以测量软X射线的二维分布，作为X光针孔相机使用非常方便。     

Studies on Synthesis and properties of Mg-Al-nitrate Layered Ouble Hydroxides

A positive Mg-Al-nitrate layered double hydroxides(LDHs) has been synthesized using a non-steady coprecipitation method.The shape.size,chemical composition,electrical property and anion exchange property of the positve nanoparticle were studied by SEM,XRD,FTIR,chemical analysis,spectroanalysis and meaxsuring of electrophoretic mobilities.Preliminary results show the positive nanoparticle is a promising precursor of polymer/LDHs nanocomposite.     

β-环糊精固定相在色谱中的应用及发展趋势

β-环糊精(β-CD)对客体分子具有良好的手性识别性，广泛应用作色谱固定相等。本文按键载技术、包裹技术等分类介绍了β-CD类固定相近年来在色谱中的应用及发展趋势，并阐述了对手性识别机理的认识。     

Compression Behaviour of Ni77P23 Amorphous Alloy up to 30.5 GPa

The compression behaviour of Ni77P23 amorphous alloy is investigated at room temperature in a diamond-anvil cell instrument using in-situ high pressure energy dispersive x-ray diffraction with a synchrotron radiation source. The equation of state is determined by fitting the experimental data according to the Birch-Murnaghan equation. It is found that the structure of Ni77P23 amorphous alloy is stable under pressures up to 30.5 GPa. Within the pressure range from zero to the experimental one, the pressure-induced structural relaxation is reversible.