时间序列散斑干涉技术研究及应用

当用相干激光照射在一个连续位移或变形的漫射物体表面时,在与参考光形成干涉的接收面上即产生一随时间变化的散斑干涉场通过对这一干涉场的时间域进行分析,可实现时变位移场的定量检测本文介绍了基本时间序列散斑干涉场的扫描相位方法和时间序列相位法的相位函数解调原理,探讨了它们的计量特性,并将其用于火箭固体燃料性能的检测.     

An investigation of phase separation by magnetic force microscopy in La0.45Sr0.55MnO3-δ(δ≈0.01)

We have found phase separation in La_0.45Sr_0.55MnO_3-δ (LSMO) by means of electron spin resonance, magnetic force microscopy (MFM) and magnetic measurements. Ferromagnetic and antiferromagnetic phases can coexist at low temperatures, and ferromagnetic and paramagnetic phases coexist when the temperature lies between the Néel and Curie temperatures. The size and shape of the ferromagnetic phases (the minority phases) was first observed directly from MFM images. It is suggested that the phase separation in LSMO is not the charge segregation type, but an electroneutral type due perhaps to the nonuniform distribution of oxygen vacancies.     

质子交换铌酸锂多模干涉光功分器的研制

采用退火质子交换工艺在铌酸锂衬底上实现了渐变边界MMI光功分器。测量表明该器件有较好的光均分功能。利用红外光谱技术分析了利用纯苯甲酸质子交换源的退火质子交换波导的红外吸收光谱特性证明通过当地选择质子交换温度、时间和退火的温度与时间，可以实现低损耗质子交换光波导的制作。     

Searching for the （3＋1）—Dimensional Painleve Integrable Model and its Solitary Wave Solution

A （3 1)-dimensional integrable model constructed by conformal invariants is proven to be integrable.The solitary wave solution of the model is obtained by a simple algebraic transformation relation between the (3 1)-dimensional Harry-Dym equation and the cubic nonlinear Klein-Gordon equation.     

钨(Ⅵ)的富集与检测方法研究进展

检测W（Ⅵ）对环境科学和生命科学研究具有积极意义。本文就1991年以来国内外W（Ⅵ）的富集手段，检测方法概况作一综述，其中包括，荧光光谱法，分光光度法，原子发射光谱法，质谱法，动力学方法，极普法，化学发光法，中子活化分析及联用技术等。     

C1催化剂MoS2/K2CO3/TiO2的制备

根据“盐类及氧化物等在高比表面载体上有自发分散倾向”的原理，制备了一种新型的用于由合成气（H2／CO）合成甲醇的催化剂MoS2/K2CO3/TiO2(DSA),该催化剂具有较好的耐硫性和对甲醇有较高的选择性。     

1.30-2.21MeV质子在硅上的160°散射截面测量

采用薄靶对能量 1.30 - 2 .2 1MeV质子在纯度为 99.99%硅上的非卢瑟福弹性背散射截面(16 0°背散射角 )进行了测量 .质子束由 2× 1.7MV串列加速器提供 ,测量仪器采用金硅面垒探测能谱仪 .实验中最低能区进入卢瑟福弹性散射能区 ,测量结果与以前发表的结果进行了比较 .所测量数据可供从事背散射分析技术的有关人员参考 . The elastic backscattering cross sections of H + from silicon for a wide energy range are very useful parameters in the proton backscattering analysis for investigating silicon content and distribution profiles in the films. It is necessary to measure the scattering cross sections with good accuracy at a large scattering angle for the applications of proton backscattering analysis. The present paper reports our measured results of differential elastic backscattering cross sections of 1.30-2.21 MeV...     

分子和金表面相互作用的第一性原理研究

从第一性原理出发利用密度泛函理论研究了 4 ,4′ 二巯基联苯分子和金表面的相互作用 ,并利用了前线轨道理论和微扰理论定量地确定了该相互作用能常数. By using density functional theory, we have investigated the interaction between a thiol-phenyl molecule (4-4′-dimercaptodibenzene) and a gold surface. The frontier orbit theory and the perturbation theory are also employed to determine quantitatively the constant of interaction energy. The results show that the bonding between the sulfur atom and the gold atoms corresponds mainly to the covalent bond and some molecular orbits are extended over the molecule and gold cluster which certainly give channels...     

核ANC和激发态中子晕

利用转移反应¹¹B(d,p)¹²B和¹²C(d,p)¹³C抽取¹²B<—>¹¹B+n和¹³C<—>¹²C+n重叠函数的核渐近归一化常数,计算了¹²B和¹³C核中价中子密度分布的均方根半径及其在核外的几率.实验结果表明,¹²B的第二(J^π=2^－),第三(J^π=1^－)激发态和13C的第一(J^π=1/2⁺)激发态为中子晕态,而¹³C的第三(J^π=5/2⁺)激发态是中子皮态.考察了库仑势和角动量对晕形成的阻碍效应.提出了均方根半径对于有效核子分离能的统一的标度定律.     

电流并联负反馈放大器实验的研究

用实验的方法，研究电流并联负反馈对放大器性能的改善，提出电流型、并联型负反馈放大器性能参数的测量方法。