关于非晶态离子导体Ag_5I_2PO_4的研究——(Ⅰ)不同温度下热处理样品的红外光谱及晶化动力学研究

本文报道了对不同温度下热处理非晶态Ag_5I_2PO_4样品的IR谱研究结果,提出了PO_4~(3-)在非晶态和晶态时的两种畸变构型,最后又采用DSC技术测定了该种材料的晶化激活能。     

低压下苯介质阻挡放电产生等离子体的探测

利用同步辐射真空紫外单光子电离技术和分子束取样，研究了低压下苯的介质阻挡放电产生的低温等离子体．通过测量光电离质谱和光电离效率谱，鉴别了等离子体放电过程中产生的一系列自由基和中性分子的化学结构．     

实Hankel矩阵谱的刻划

1991年,K.R.Driessel在文[1]中提出了问题Problem A:任给n个实数,若它们是一个n阶实Hankel矩阵的特征值,则这n个实数必须满足何条件?针对这一问题,文[2]研究了n阶实Hankel矩阵的谱的一些性质,并且给出了Problem A的一个必要条件.利用V.Neumann不等式对这一问题作了进一步的完善,给出了Problem A的几个必要条件,并且给出了ProblemA的必要条件的一个通用表达式,推广了文[2]的部分结果.     

煤自燃性的红外光谱研究

煤自燃主要受煤结构和环境因素影响.在确定的粒度与外界条件下,可通过分析煤结构来判断其自燃倾向性.文中根据神府煤及其预氧化产物的红外光谱特征,说明煤的氧化是从一些氧化活性基团开始,且活性基团含量越大越易自燃;提出了通过红外光谱及其差谱分析,对比不同煤种中氧化活性基团的相对含量而预测煤自然发火期的方法;通过对灵武、大柳塔和焦坪煤进行红外光谱分析,得到了它们自燃倾向性的次序,并根据焦坪及大柳塔煤层的自然发火期,确定了灵武煤自然发火期的范围.研究结果与实验模拟及现场观测结果一致,说明用FTIR研究煤的自燃倾向性是可行的.     

拉曼光谱在古陶片研究中的应用

利用LRS-Ⅱ型激光拉曼光谱仪对不同年代的古陶片进行了测试研究,用X射线衍射图谱分析确定了古陶片的主要成分。测试结果表明不同年代的古陶片的主要成分相同;从所获得的拉曼光谱图可以看出,随着地质年代的不同,拉曼光谱图向高波数方向移动,对其确定古陶片的历史年代提供了很重要的依据。     

用于光纤放大器和光纤激光器的掺铒铝玻璃

主要针对掺铒铝酸钡玻璃进行了介绍，考查了掺铒铝玻璃中铒^4I13/2能级的光谱性质。结果表明：铝玻璃由于具有较低的声子能，其量子效率高于磷酸盐玻璃；从而掺铒铝玻璃的发射密度高于掺铒磷酸盐玻璃。掺铒铝酸钡玻璃是一种很好的，可用于光纤放大器的材料。     

Relation of chaos activity characteristics of the cardiac system with the evolution of species

According to the nonlinear theory, the experiments have been conducted on sample ECG (electrocardiogram) signals of healthy human beings, coronary heart disease patients and adult canines. On the basis of the analyses of the power spectra, the computation of the correlation dimension and the Lyapunov exponent to a large number of ECG signals, the following conclusions are shown: through the comparative research, (1( the analyses of the power spectra, the computation of the correlation dimension and the Lyapunov exponent to the ECG signals reflect the whole dynamic characteristics of the hearts, and they may become a new method of researching ECG quantitatively to an early diagnose of heart disease. (2( Under normal physiological conditions the cardiac activities are chaotic, while under pathologic conditions the cardiac activities approach regularity. (3( On the basis of the comparative research of human beings and canines, it is revealed that chaos may be a quantitative index to measure the evolution of species. This conclusion would supply a new cut-in point to elaborate the Darwin theory, and it would enable us to explain the life theory renewably using the basic principle of nonlinear theory.     

Dissociation of methanol in intense femtosecond laser field

Methanol was irradiated by 80 fs laser pulse, intensity range of 10¹³–10¹⁴ W/cm². A TOF-mass spectrometer was coupled to the laser system and used to detect the ions produced. The parent ions CH₃OH⁺ appeared firstly at the laser intensity of 1.4×10¹³ W/cm². While the laser intensity was gradually increased, the parent ions were dissociated and the primary ions CH₂OH⁺ were given as verified from the irradiation of deuterated methanol (CH₃OD) showing the C—H bond cracking firstly. While the laser intensity was further increased to 2.0 × 10¹³ W/cm², the C—O bonds of the parent ions also broke to give CH₃ ⁺. When the laser intensity was higher, smaller fragment ions like CH⁺, C⁺, OH⁺ and O⁺ also appeared. Among the fragment ions, only H⁺ ion yield had anisotropic angular distribution dependence on the laser polarization vector in the dissociation of methanol. All the experimental observations show that the dissociation of methanol proceeds through stepwise mechanism but not Coulomb explosion.     

敏化离子Yb3+对Er3+:Yb3+:YCa4O(BO3)3晶体光谱参数的影响

通过对Er^3 单掺和Er^3 、Yb^3 双掺YCa4O(BO3)3（简称为Er:YCOB和Er:YYCOB）室温吸收谱的测量和计算，发现Yb^3 的敏化作用十分显著，以至于Judd-Ofelt(JO)理论的传统算法不能奏效。本文用数值法和联立法求解了全部JO参数，计算了能量转移的量值。JO参数表明，Er:YYCOB在InCaAs二级管激光泵浦下，有望产生1500nm左右的红外激光输出。而Er:YCOB，由于Er^3 离子在此波长附近的重复吸收损耗较大，红外激光输出的可能性很小。     

Me2SnCl2与脱铁伴清蛋白作用的紫外差光谱研究

在 4mm ol/ L Na H2 PO4- 10 0 mm ol/ L Na Cl- 2 5 mm ol/ L Na HCO3 缓冲溶液 (p H=7.4)和 2 98K条件下 ,用紫外差光谱研究了 Me2 Sn Cl2 与脱铁伴清蛋白的作用。结果表明 Me2 Sn Cl2 与脱铁伴清蛋白形成 2∶ 1的配合物 ,其结合常数用作图法求得为 7.83× 10 4L/ mol