Study on absorbance and laser damage threshold of HfO2 films prepared by ion-assisted reaction deposition

Using a new kind of EH1000 ion source, hafnium dioxide (HfO2) films are deposited with different deposition techniques and different conditions. The absorbance and the laser damage threshold of these films have been measured and studied. By comparing these characteristics, one can conclude that under right conditions, such as high partial pressure of oxygen and right kind of ion source, the ion-assisted reaction deposition can prepare HfO2 films with higher laser induced damage threshold.     

Research on six-degree-of-freedom calibration system for wind tunnel balances with a collimated laser beam

A newly-developed six-degree-of-freedom calibration system for the wind tunnel balances is introduced. The frame of the system, the functions and the operating principle of different parts are presented in detail. The system is composed of four parts: the automatically loading subsystem, the automatically resetting subsystem, the data-acquisition subsystem and the measurement subsystem. The results of some cell experiments proved that the system can meet the needs of the present calibration task of the balance. Through further improvement, the system can be also used to calibrate other devices with multi degree-of-freedom and measure the minute shifts, such as the guide rail of machine tool and the assembling of large parts and so on.     

催化热解C2H2制备螺旋形碳晶须

以Ni粉为催化剂，在高温下催化热解乙炔(C2H2)，制备出了螺旋形碳晶须材料．实验结果表明：催化热解乙炔(C2H2)制备螺旋形碳晶须的最佳温度范围为450～600℃，恒温时间为60～70min，气体流量比分别为ρ(C2H2)：ρ(Ar)=7：6，ρ(C2H2)：ρ(Ar)=25：3及ρ(C2H2)：ρ(Ar)：ρ(H2)=3：4：7．经透射电镜、扫描电镜、X射线衍射仪分析表明，螺旋形碳晶须的螺径为130～1000nm，螺距为100～350nm，晶须直径在100nm左右，晶须长度达几百微米．在加入氢气的情况下，出现了少量的直径在500nm左右的管状碳晶须．将螺旋形碳晶须放入Ar气中，850℃温度下经历1h，成分结构未变，结晶性更好．     

2-HBR负载树脂分离富集钯的研究及其分析应用

本文探讨了2一经基节又罗丹宁(2-HBR)负载树脂对裂的吸附特性及其分析应用.根据吸附平衡的研究，探讨了树脂对会巴的吸附反应机理.     

核内核子费米运动对π核双电荷交换反应的影响

本文考察了核内核子费米运动对π核双电荷交换(DCX)反应传统机制的影响,计算了¹⁴C核到同位旋相似态的双电荷交换(DIAs DCX)反应在0～300MeV能区的0°激发函数,在100～300MeV的能区内能够很好地符合实验值,而在50MeV附近,则比实验值小2～3倍.结果表明:仅用传统机制似乎不能完全解释DIAS DCX的低能反常行为,需要引入新的机制.     

BGO晶体光输出性能的研究

本文报道了BGO晶体荧光收集的实验研究. 结果表明, 与光电倍增管耦合的晶体的表面粗糙可以提高光收集效率.     

广义梯度映射的广义度的若干结果

本文在[1]的基础上给出了A-proper广义梯度映射的广义度的一些进一步的结果。本文中所用的记号同[1].     

从微观化学结构分析全息图的环境稳定性

本文根据实验结果,比较分析分别用两种不同重铬酸盐全息材料(重铬酸盐明胶和无明胶重铬酸盐全息软片)制作的全息图的内部光化学反应产物(螯合物)的微观化学结构,对二者在抗潮能力和环境稳定性方面表现出的显著差异作了比较合理的理论解释。首次提出全息图具有优良的抗潮能力和环境稳定性的根本原因在于螯合物(?)部化学结构的完全对称的观点。     

关于Green定理的推广及其应用

本文减弱古典的Green 定理,证明其结论依然成立,并利用此结果,讨论了复变函数中的Cauchy积分定理和解析函数的若干问题.