海洛因的傅里叶红外吸收谱

给出海洛因和鸦片的傅里叶红外吸收实测谱。根据吸收峰的位置，计算出海洛因的基本声子能量：ＥＬＯ＝０．０４８６ｅＶ，ＥＴＯ１＝０．０５５５ｅＶ，ＥＴＯ２＝０．０６１６ｅＶ，ＥＬＡ＝０．０２５７ｅＶ，ＥＴＡ１＝０．００９７ｅＶ，ＥＴＡ２＝０．０１３４ｅＶ。这些声子按照不同的组合方式，形成海洛因的全部傅里叶红外吸收峰。     

粲夸克偶素P波态χ_（c0）宽度测量

利用北京谱仪在北京正负电子对撞机上采集的３５０万（２Ｓ）事例，通过（２Ｓ）→γπ－和γＫ＋Ｋ－反应道测量了Ｘｃ０的总宽度．由ＭｏｎｔｅＣａｒｌｏ模拟给出的质量分辨函数，利用拟合Ｘｃ２谱形得到的质量分辨作标定后，用于Ｘｃ０宽度的拟合，得到Ｘｃ０的宽度为（１５．０）ＭｅＶ．同时定出了ＸｃＪ（Ｊ＝０，２）到π＋π＝和Ｋ＋Ｋ－的衰变分支比．结果为Ｂ（Ｘｃ０→π＋π－）＝（４．２７±０．２３±Ｏ．６０）×１０－３；Ｂ（Ｘｃ０→Ｋ＋Ｋ－）＝（３．４４±０．２１±０．４７×１０－３；Ｂ（Ｘｃ２→π＋π－）＝（１．５２±０．１７±０．２９）×１０－３和Ｂ（Ｘｃ２→Ｋ＋Ｋ－）＝（５．２±１．１±１．８）×１０－４，其中第一项误差为统计误差，第二项为系统误差。     

热稳定法拉第旋转TbYbBiIG磁光单晶及性能

采用高温溶液法，以Ｂｉ２Ｏ３／Ｂ２Ｏ３为助熔剂成功地生长出掺铋复合稀土铁石榴石（ＴｂＹｂＢｉ）３Ｆｅ５Ｏ１２（简称ＴｂＹｂＢｉＩＧ）晶体。晶体外形规则，最大尺寸为７×６×４ｍｍ３，Ｘ射线衍射分析证实，生长的晶体为ＴｂＹｂＢｉＩＧ单相单晶体，扫描电镜能谱分析其组成为Ｔｂ２．０６Ｙｂ０．４６Ｂｉ０．４８Ｆｅ５Ｏ１２。在１．０μｍ～１．７μｍ波段测量出晶体法拉第旋转谱和光吸收谱。当λ＝１．５５μｍ时，在１０°Ｃ～８０°Ｃ温度范围内测得法拉第旋转θＦ的温度系数为ｄθＦ／ｄＴ＝－２．３×１０－２ｄｅｇ·ｍｍ－１Ｋ－１。研究结果表明，ＴｂＹｂＢｉＩＧ单晶体在近红外波段θＦ约为ＹＩＧ单晶的３倍，温度系数小，是制作高性能光隔离器的一种好材料     

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     

NbSr_2（LaCe）_2Cu_2O_（10－δ）28K的超导电性

电阻和交流磁化率测量表明，ＮｂＳｒ２Ｌａ１．３５Ｃｅ０．６５Ｃｕ２Ｏ１０－δ在２８Ｋ时具有超导电性，起始转变温度为２８Ｋ．Ｘ射线衍射表明它属于四方晶系，晶胞参数ａ＝３．８９６Ａ，Ｃ＝２８．３１９Ａ．该化合物结构与Ｔａ－１２２２结构相似．     

新型含偶氮侧链聚合物中光致各向异性及偏振全息记录

研究了偶氮侧链聚合物中光致各向异性和偏振全息, 确认在这种聚合物中分析光致各向异性动力学过程时, 必须考虑光漂白效应的影响, 测量表明该聚合物具有大的光致双折射（Δｎ ＝７．８×１０－ ３）, 并在其中记录了高衍射效率（η＝ １９．３％ ）的偏振全息图     

第四届非物理类专业大学生物理竞赛试题及解答(1987)

第四届非物理类专业大学生物理竞赛试题及解答（１９８７）试题（给出常数：普朗克恒量ｈ＝６．６３×１０－３４Ｊ·ｓ玻耳兹曼恒量ｋ＝１．３８×１０－２３Ｊ·Ｋ－１电子电量ｅ＝１．６×１０－１９Ｃ电子质量ｍｅ＝９．１×１０－３１ｋｇ）一、选择题（共３２分，每...     

Bi－2201单晶调制结构的X射线衍射观测

本文用Ｘ射线的方法对Ｂｉ－２２０１大片超导单晶的调制结构进行了研究．在衍射谱中，除了００１的主衍射峰外，还出现了一系列卫星峰．由这些卫星峰的位置可以得到这种单晶的调制波矢ｑ＝０．２０８ｂ＋０．３６ｃ．这与用电子显微镜观测的结果基本一致．     

二元光学反／衍混合Schmidt望远系统光学设计

针对空间光学系统轻型的特点，采用衍射光学元件取代Ｓｃｈｍｉｄｔ校正板来校正系统像差，设计了一个二元光学反／衍混合Ｓｃｈｍｉｄｔ望远系统。光学系统的通光孔径为＝２００ｍｍ，相对孔径Ｆ／＃＝１．９，波长λ＝４．３μｍ，视场２ω＝１０°。光学设计采用ＯＳＬＯｓｉｘ软件。光学设计结果：空间频率ν≤６０ｃｙｃｌｅｓ／ｍｍ时，调制传递函数ＭＴＦ≥０．４。     

三种固态六氟化镓离子化合物的远红外光谱研究

用傅里叶变换红外光谱法研究了Ｒｂ３ＧａＦ６，室温相αＣｓ３ＧａＦ６和高温相Ｃｓ３ＧａＦ６冰晶石类氟化物的远红外光谱，地它们的光谱带进行了指认，并进行了Ｘ射线衍射分析，结果表明，Ｒｂ３ＧａＦ６与高温相Ｃｓ３ＧａＦ６同属四方晶系，晶胞参数分别为ａ＝６．３２，ｃ－８．８６Ａ和ａ＝６．８７，ｃ＝９．８７Ａ，α－Ｃｓ３ＧａＦ６属正交晶系，ａ＝１０．６２，ｂ＝９．９６，ｃ＝５．６１Ａ。     

Observation and identification of X－ray（0．3－30Bnm) multiple－order diffraction spectra

ＯｂｓｅｒｖａｔｉｏｎａｎｄｉｄｅｎｔｉｆｉｃａｔｉｏｎｏｆＸ－ｒａｙ（０．３－３０ｎｍ）ｍｕｌｔｉｐｌｅ－ｏｒｄｅｒｄｉｆｆｒａｃｔｉｏｎｓｐｅｃｔｒａＦＥＮＧＸ．Ｐ；ＨＯＵＸ．Ｂ；ＺＨＡＮＧＺ．Ｑ；ＸＵＺ．Ｚ．（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅ...     

红外指纹图谱结合系统聚类分析法在海洛因同一认定中的应用初析

文章利用傅里叶变换(FTIR)红外光谱法首次结合化学计量学方法进行处理,对不同途径缴获的海洛因指纹图谱进行了系统聚类分析,结果表明,聚类分析技术可对不同途径缴获的海洛因进行了鉴别,该法简便、快速、准确,为海洛因同一认定提供了一种新的方法。     

Intermolecular interactions of immunoactive 8-azasteroid

Intermolecular interactions in 2,3-dimethoxy-8-azagone-1,3,5(10),13-tetraene-12,17-dione and the molecular and crystal structure of this compound were studied by IR spectroscopy and x-ray diffraction analysis. Shortened intermolecular contacts related to the C-H?O, C-H?π, and π?π interactions were revealed in crystals of this 8-azasteroid. These contacts manifest themselves in changes in the characteristic frequencies of C-H, C=O, and C=C vibrations in the IR spectra. A relationship between the intermolecular interactions occurring in the crystalline and noncrystalline solid phases and the changes in the IR spectra of this compound was established.     

V-doped MgAl6O10:novel luminescence substrate for phosphor-free UV-white LEDs

V-doped MgAl6O10 is grown by the conventional Czochralski method. The crystal structure and the cell parameters are analyzed through X-ray diffraction experiments. The absorption and emission spectra are investigated. Under pumping at 324 nm, the emission spectra of V-doped MgAl6O10 obtain two emission peaks at the wavelengths of 471 and 570 nm. Two emission bands of the spectra combine to produce a spectrum that is perceived as white by the naked eye. Therefore, V-doped MgAl6O10 single crystal can be applied as substrate for phosphor-free ultraviolet (UV)-white light-emitting diodes (LEDs).     

Phase size effect in thin Ge-Se polycrystalline films

The Raman spectra of thin (d = 60–170 nm) Ge-Se polycrystalline films obtained by vacuum thermal evaporation of Ge₁₀Se₉₀ glass are investigated in the spectral range 110–310 cm^?1. The coexistence of the glasslike and crystalline phases α-Se, β-Se, and β-GeSe₂ is established using the X-ray diffraction method. Analysis of diffraction patterns and the Raman spectra of polycrystalline samples of various thicknesses demonstrates a phase size effect in the transition of Se from the α-monoclinic to the β monoclinic modification (d ～ 120 nm). It is found that the crystalline phase of Se is of the nanodisperse type with an average grain size of ～30–50 nm. Crystallites of β-GeSe₂ have an average size of ～100–130 nm.     

LaMn_(1-x)Fe_xO_3的结构和Raman光谱

通过柠檬酸法制备了钙钛矿型氧化物LaMn1-xFexO3(x=0,0.2,0.4,0.5,0.6,0.8,1),经XRD分析,x≤0.2时结构为六角相,x0.2时为正交相。实验测量了材料的拉曼光谱,发现650 cm-1左右的光谱峰位随成分参量x的变化而变化,在x≤0.2时,Raman峰随x增大向高频移动,x0.2时,则向低频移动。     

P- V- T Data of hexagonal boron nitride h BN and determination of pressure and temperature using thermoelastic equations of state of multiple phases

Abstract

A synchrotron x-ray diffraction study on hexagonal boron-nitride (hBN) was conducted at simultaneous high pressures and temperatures. The pressure applied to the sample is pseudo-hydrostatic up to 9.0 GPa and the temperature was homogeneous in the range of 300 K to 1280 K. A modified Rietveld profile refinement has been applied to these diffraction spectra of low symmetry and multiple phases observed in the energy-dispersive mode. Thermoelastic parameters of hBN were derived by fitting a modified high temperature Birch-Murnaghan equation of state. The results are: bulk modulus K=17.6 GPa, pressure derivative K′=?K/?P=19.5, temperature derivative [kdot]=?K/?T=?0.69 × 10^?2 Gpa/K, volumetric thermal expansivity α=a+bT with values of a=4.38 × 10^?5K^?1 and b=1.75 × 10^?8K^?2, respectively. It is observed that the thermal expansion and compression along different crystal axes are significantly different. The crystal c-axis is much more expandable and compressible than the a-axis. This is attributed to the layered structure of the hBN. Because the thermoelastic equations of state of hBN and NaCl are quite different, the unit cell volumes of these two materials, derived from the same diffraction pattern, can be used to derive the experimental P-T conditions. The large intersection angle of isochoric lines of these phases in P-T space ensures a determination of P-T with satisfactory precision. The application and limitations of this method in obtaining experimental pressure and temperature using diffraction data and thermoelastic equations of state of multiple phases are discussed.     

Multiplicity structure of proton and kaon diffractive dissociation in 10 and 16 GeV/c K-p interactions

A new method to calculate diffractive mass spectra has been developed. It is applied to K^-p interactions at 10 and 16 GeV/c. Cross sections and mass spectra are given for the difractive dissociation processes p→(N+iπ) and K^-p→(K+iπ) for i = 1 to 5 and also summed over all multiplicities. In addition to the diffractive peak at low mass coming from low multiplicities, a long tail extending to high masses and high multiplicities has been found. The multiplicity structure of diffraction dissociation can be understood in the context of the two-step dynamical picture of Pokorsky and Van Hove.     

Fluid synthesis and structure of a new polymorphic modification of boron nitride

A new previously unknown phase of boron nitride with a hardness of 0.41–0.63 GPa has been pre-pared by the supercritical fluid synthesis. The presence of a new phase is confirmed by the X-ray spectra and IR absorption spectra, where new reflections and bands are distinguished. The fundamental reflection of the X-ray diffraction pattern is d = 0.286–0.291 nm, and the characteristic band in the infrared absorption spectrum is observed at 704 cm^?1. The X-ray diffraction pattern and the experimental and theoretical infrared absorption spectra show that a new synthesized boron nitride phase can be a cluster crystal (space group 211) with a simple cubic lattice. Cage clusters of a fullerene-like morphology B₂₄N₂₄ with point symmetry O are arranged in lattice sites.