四氯合铜酸苯铵盐的结构及其红外与拉曼光谱研究

制备了四氯四铜酸苯铵盐（Ｃ６Ｈ５ＮＨ３）２ＣｕＣｌ４单晶，Ｍｒ＝１８７．２６，由四园衍射数据确定了晶体结构，晶体属单斜晶系，空间群Ｐ２１／ａ，ａ＝０．７１８４（１），ｂ＝０．７４４８（２），ｃ＝１．５０７０（４）ｎｍ，β＝１００．６７（２）°，Ｖ＝０．７９２４ｎｍ＾３，Ｚ＝２，Ｄｘ＝１．６５０ｇｃｍ＾－３，（Ｍｏ，Ｋａ）＝０．０７１０６９ｎｍ，μ＝４．０５６ｍｍ＾－１，Ｆ（０００）＝３８９，Ｒ＝０     

纳米(Y0.95Eu0.05)2O3及其SiO2气凝胶介孔组装体的制备与光致发光

采用尿素溶胶法合成（Ｙ０．９５Ｅｕ０．０５）２Ｏ３纳米粉,用超临界干燥技术制备了ｎ－（Ｙ０．９５Ｅｕ０．０５）２Ｏ３／ＳｉＯ２气凝胶介孔组装体。结果表明,当Ｙ＾３＋：Ｅｕ＾３＋＝２０：１,均相反应时间为４ｈ,且经６８０℃、４ｈ灼烧热处理后得到的ｎ－（Ｙ０．９５Ｅｕ０．０５）２Ｏ３中,光致发光强度最大（发光峰位于６１２ｎｍ）,以Ｓｉ与２Ｙ摩尔比为１：７的ｎ－（Ｙ０．９５Ｅｕ０．０５）２Ｏ３／ＳｉＯ２气凝胶介孔组装体,经同样条件热６１６ｎｍ）。对产生上述发光强度减弱和峰位红移现象进行讨论。     

用于等离子体电位测量的电容探针和发射探针

本文给出了发射探针和电容探针测量等离子体电位的实验和方法。发射探针采用直流功率加热，并在较强电子发射条件下运行（Ｉ_（ｅ０）／Ｉ_（ｅ０）＞１）。电容探针表面二次电子发射系数δ≥１。本文对发射探针的电子发射性能、工作电流、电容探针的输入、输出电压关系进行了标定实验。得到了电容探针的校准系数分别为３×１０（－３）、５×１０（－４）。实验给出了ＭＭ－４会切中心等离子体电位Ｖ_（ｐ４）＝－８２±９－１２２±１２Ｖ；ＭＭ－４Ｕ东、西会切中心等离子体电位分别为Ｖ_（Ｐ４ｕ１）＝－５２．９±３．２Ｖ，Ｖ_（Ｐ４ｕ２）＝－６２±３．２Ｖ。     

非晶PET纤维的分子链段取向分布的研究

用对称透射法,收集在室温下不同拉伸比的非晶聚酯（ＰＥＴ）纤维之二有Ｘ射线散射（ＷＡＸＳ）强度函数Ｉ（κ,α）,采用自编ＭＰＳ９６型全谱分峰程序,将不同方位角α测得的ＷＡＸＳ强度曲线上的４个非晶重叠峰进行分解,获得分子链间原子 射引起的２个峰为：ＫＡ＝０．１４１ｎｍ＾－１,ＫＢ＝０．１７２ｎｍ＾－１;分子链内原子 射引起的２个峰为;ＫＣ＝０．３１１ｎｍ＾－１,ＫＤ＝０．５５５ｎｍ＾－１,详细分析了     

一种新尾式卟啉吡啶季铵盐对锌离子显色反应的研究

本文研究了一种新型尾式卟啉吡啶季铵盐５－［４－（４－吡啶丁氧基）苯基］－１０,１５,２０－三（４－氯苯基）卟啉溴化物与锌的反应条件。ｐＨ＝１０．０,在吡啶存在下,于沸水浴中加热１５ｍｉｎ,其与Ｚｎ２＋形成１∶１配合物,其最大吸收波长位于４２８．６ｎｍ,在此条件下试剂的最大吸收波长在４１８．２ｎｍ,相差１０ｎｍ,配合物摩尔吸光系数４．６４×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,锌在０—１．２μｇ／１０ｍＬ范围内符合比耳定律,相关系数ｒ＝０．９８８８,本法是目前报道的分光光度法测定锌的最灵敏方法之一。     

抗癌药物铂络合物构效关系的物理方法研究

本文用Ｘ射线衍射、傅里叶变换红外光谱、差热分析等物理方法研究了抗癌药物铂络合物特性、结构以及构效关系．研究结果表明：ｃｉｓ－［Ｐｔ（ＮＨ３）２Ｃｌ２］属简单斜方晶系,晶格常数ａ＝０．９２２１ｎｍ,ｂ＝０．８７７１ｎｍ,ｃ＝０．６８９０ｎｍ．草酸二氨合铂的结构为斜方晶系,其晶格常数为：ａ１＝１．０７２１ｎｍ,ａ２＝０．６４０２ｎｍ,ａ３＝１．８５７０ｎｍ,并用傅里叶变换红外光谱、差热分析、元素分析等方法对它们理化特性进行了研究     

406.7—415.4nm和632.8nm辐射在人肺组织中的穿透深度

在对作者原有工作改进的基础上，应用自行研制的“光纤探针深度计”首闪精确了Ｋｒ＾＋紫激光４０６．７－４１５．４ｎｍ和Ｈｅ－Ｎｅ激光６３２．８ｎｍ，波长年新鲜离体人肺组织中光能流率分布，获得这一定两种重要波长处人肺正常组织和人肺腺鳞癌组织中光能流率的分布规律及光穿深度的数值：（１）δｎｏｅｒｍａｌ＝０．０８ｍｍ，δｔｕｍｏｕｒ＝０．３２ｍｍ；（２）δｎｏｒｍａｌ＝１．１９ｍｍ，δｔｕｒｍｏｕｒ＝１．７     

5′-硝基-水杨基荧光酮-溴化十六烷基 三甲胺荧光猝灭法测定微量锆

本文基于Ｚｒ（Ⅳ）－５′－硝基－水杨基荧光酮（５′－Ｎ－ＳＡＦ）－溴化十六烷基三甲铵（ＣＴＭＡＢ）体系的荧光猝灭效应,提出一种测定微量锆的新荧光分析方法。在０．８～１．２ｍｏｌ／Ｌ的Ｈ２ＳＯ４介质中,在ＣＴＭＡＢ存在下,锆与５－Ｎ－ＳＡＦ生成组成比为１∶４的橙红色络合物。该体系存在两个激发峰,其激发波长分别为λｅｘ１＝４７５ｎｍ,λｅｘ２＝５０５ｎｍ,发射波长λｅｍ＝５２５ｎｍ。锆（Ⅳ）浓度在２．０～８０μｇ／Ｌ呈良好线性关系,检出限为２．０μｇ／Ｌ。本法灵敏度高,选择性好,用于铝合金中微量锆的测定,获得满意结果。     

一种新型尾式卟啉吡啶季铵盐对锌离子显色反应的研究

本文研究了一种新型尾式卟啉吡啶季铵盐５－「４－（４－吡啶丁氧基）苯基」－１０,１５,２０－三（４－氯苯基）卟啉溴化物与锌的反应条件。ＰＨ＝１０．０,在吡啶存在下于沸水浴中加热１５ｍｉｎ,其与Ｚｎ＾２＋形成１：１配合物,其最大吸收波长位于４２８．６ｎｍ,在此条件下试剂的最大吸收波长在４１８．２ｎｍ,相差１０ｎｍ,配合物摩尔吸光系数４．６４×１０＾５Ｌ·ｍｏｌ·ｃｍ＾－１,锌在０－１．２μｇ／１０ｍＬ     

类Ne锌X射线激光的实验研究

介绍了在“星光”装置上进行的类Ｎｅ锌Ｘ射线激光实验．激光器输出能量为１８０～２００），单脉冲泵浦时观测到２６．２ｎｍ、２６．７ｎｍ（Ｊ＝２—１）两条激光线，加预脉冲方式泵浦时观测到了２１．２ｎｍ（Ｊ＝０—１）、２６．２ｎｍ、２６．７ｎｍ（Ｊ＝２—１）和３１．４ｎｍ（Ｊ＝２—１）四条激光线。     

Guided-Wave Two-Dimensional Acousto-Optic Scanner Using Proton-Exchanged Lithium Niobate Waveguide

Two-dimensional scanning of a 0.6328 mum guided-light beam has been realized using noncolinear acousto-optic (AO) coplanar Bragg diffraction together with colinear AO guided-mode to substrate radiation-mode conversion in a Z-cut Xpropagation LiNbO3 proton-exchanged (PE) waveguide. The two surface acoustic (SAW) waves utilized are at the center frequencies of 500 and 200 MHz, propagating in the Y and X axes, respectively. Two-dimensional scanning of approximately 720 resolvable light beam spots, namely, 18 40 (horizontal vertical) scanning, has been demonstrated using a light beam of 1.0 mm aperture. The total number of resolvable beam spots can be greatly increased from 720 by simply utilizing SAW transducers of larger bandwidth and a light beam of greater aperture. It should also be possible to significantly increase the diffraction efficiency from 3 % by optimizing the parameters of the PE waveguide and the SAWs.     

Hybrid Wavelength and Code Division Multiple Access in Optical Networks

A review of schemes for multiple access in fiber optic networks shows that a hybrid of wavelength and code division multiple access (WCDMA) combines the best features of both. In particular, the hybrid scheme retains the large information carrying capacity of wavelength division multiple access (WDMA) and flexibility of code division multiple access (CDMA). In this paper WDMA, optical CDMA (OCDMA), and WCDMA networks are discussed. In OCDMA networks, concept of incoherent and coherent coding including inverse decoding and matched filter is introduced. The delay performance of both WDMA and WCDMA networks, under the simple suboptimum access protocols based on cyclic search, is computed. It has been shown quantitatively that tuning delay significantly affects the delay performance of both WDMA and WCDMA networks. Futhermore, delay performance of WCDMA networks is always better than the WDMA networks for the same tuning delay, load, and number of users.     

Effect ofγ-radiation on the spectral luminescence characteristics of impure cadmium tungstate crystals

Results of a study of the effect of γ-radiation on the spectral luminescence properties of cadmium tungstate crystals doped with silver, bismuth, and molybdenum cations are presented. Spectral characteristics of the nondnnnoped crystals are briefly described. Absorption and photo and X-ray luminescence spectra of the crystals taken before and after exposure to γ-radiation (5.5·10⁴ Gy) are compared. It is found that the spectral characteristics of the crystals doped with silver, bismuth, and molybdenum cations do not change markedly after the exposure. The relation between the type of impurity-induced defects, individual characteristics of the impurity cations, and the character of the effect of γ-radiation on the spectral luminescence properties of impure crystals is analyzed (preliminarily). Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 55–60, January–February, 1997.     

Femtosecond Transform-Limited Pulse Generation by Compensating for the Linear Chirp of SPM Spectra in Dispersion Shifted Fibers

A simple technique of pulse compression, based on the linear chirp compensation of self-phase modulation (SPM) spectra in dispersion shifted fibers, is demonstrated. The optimization procedure is carried out, for a short span of a single-mode fiber, using a parabolic law, which describes the behavior of the squared output pulse width versus the pump peak power in the case of Gaussian pulses. The experimental results give a minimum pulse duration of 233 fs, which is in good agreement with the model. Shorter and coherent pulses, down to 90 fs, have been obtained by inserting an interference filter at the optical output.     

Sorting of bending magnets for the SSRF booster

The Shanghai Synchrotron Radiation Facility(SSRF)booster ring,a full energy injector for the storage ring,is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping.Closed orbit distortion(COD)caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting.Considering the affections of random errors in measurement,both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5is given as the final installation sequence of the booster bending magnets in this paper.     

Measurement of nonlinear coefficient of optical fiber based on small chirped soliton transmission

We measure the waveform and phase curves of short optical pulses before and after transmission over different lengths of fibers by use of the pulse analyzer with the frequency-resolved optical gating (FROG),and numerically simulate pulse evolution under the experimental conditions.The nonlinear coefficient of the fiber is given by comparing the experimental results with the numerical ones.Difference between the experiment and numerical simulation is analyzed.     

Resonance scattering of canonical elastic shells in absorbing fluid medium

Resonance scattering of elastic spherical shell and cylindrical shell while the surrounding fluid medium has absorption is studied. The normal mode solution derived using exact elastic theory and the separation of variables is still applicable. However, the scattering form function has to be modified for the absorbing medium, otherwise the unreasonable result would be obtained. The backscattering form function in the absorbing medium is redefined, and the form function of elastic spherical and cylindrical shell with vacuum or solid matter filled is calculated in various absorption conditions. The results show that the absorption of surrounding fluid leads to notable attenuation of the coincidence resonances in the mid-frequency, but it has a little influence on the low-frequency resonance scattering induced by the filler inside the shell.     

Single-beam self-referenced phase-sensitive surface plasmon resonance sensor with high detection resolution

A versatile and low-cost single-beam self-referenced phase-sensitive surface plasmon resonance(SPR)sensing system with ultra-high resolution performance is presented.The system exhibits a root-mean-square phase fluctuation of ±0.0028.over a period of 45 min.i.e.a resolution of±5.2×10-9 refractive index units.The enhanced performance has been achieved through the incorporation of three design elements:a true single-beam configuration enabling complete self-referencing so that only the phase change associated with SPR gets detected,a differential measurement scheme to eliminate spurious signals not related to the sensor response,and the elimination of retardation drifts by incorporating temperature stabilization in the liquid crystal phase modulato .Our design should bring the detection sensitivity of non-labeling SPR biosensing closer to that achievable by conventional fluorescence-based techniques.     

Influences of SiO2 protective layers and annealing on the laser-induced damage threshold of Ta2O5 films

Ta2O5 films are prepared on BK7 substrates with conventional electron beam evaporation deposition.The effects of SiO2 protective layers and annealing on the laser-induced damage threshold (LIDT) of the films are investigated.The results show that SiO2 protective layers exert little influence on the electric field intensity(EFI)distribution,microstructure and microdefect density but increase the absorption slightly.Annealing iS effective on decreasing the microdefect density and the absorption of the films.Both SiO2 protective layers and annealing are beneficial to the damage resistance of the films and the latter is more effective to improve the LIDT.Moreover,the maximal LIDT of Ta2O5 films is achieved by the combination of SiO2 protective layers and annealing.