氢分子在磁场中回归谱的散射矩阵理论研究

利用散射矩阵理论,结合扩展的半经典闭合轨道理论和多通道量子亏损理论,计算了磁场中高里德堡H2分子的回归谱.该方法使用了两个空间散射矩阵来描述里德堡电子的动力学性质,计算中可以包括所有阶的实散射的作用.回归谱的每一个尖峰对应着一条闭合轨道,新的额外峰是由于弹性散射和非弹性散射所引起的通道内和通道间的轨道组合,进一步证明了体系通道间和通道内的散射具有同等的重要性.     

Magnetic Fluctuation Measurement in Sino United Spherical Tokamak Plasma

To investigate the magnetic fluctuations and for further transport study, the poloidal and radial magnetic field t is conducted on the Sino United Spherical Tokamak （SUNIST）. Auto-power spectral density indicares that the magnetic fiuctuation energy mainly concentrates in the frequency region lower than lO kttz. The magnetic field oscillations, which are characterized by harmonic frequencies of 40 kHz, are observed in the scrape- off layer; by contrast, in the plasma core, the magnetic fluctuations are of Gaussian type. The time-frequency profiles show that the poloidal magnetic fluctuations are temporally intermittent. The autocorrelation calculation indicates that the fluctuations in decorrelation time vary between the core and the edge.     

Dynamic Ni gettered by PSG from S-MIC poly-Si and its TFTs

A dynamic phosphor-silicate glass （PSG） gettering method is proposed in which the processes of the gettering of Ni by PSC and the crystallizing of α-Si into poly-Si by Ni take place simultaneously. The effects of PSC gettering process on the performances of solution-based metal induced crystallized （S-MIC） poly-Si materials and their thin film transistors （TFTs） are discussed. The crystallization rate is much reduced due to the fact that the Ni as a medium source of crystallization is extracted by the PSC during crystallization at the same time. The boundary between two neighbouring grains in S-MIC poly-Si with PSG looks blurrier than without PSG. Compared with the TFTs made from S-MIC poly-Si without PSC gettering, the TFTs made with PSC gettering has a reduced gate induced leakage current.     

磺酸水杨酸二钠晶体的非线性光学性质

报导一种新的非线性光学材料——磷酸水杨酸二钠(简称DSS)晶体,用水溶液降温法得到光学质量优良的大单晶。X射线衍射法测定晶体属正交晶系,点群为mm2。透射光谱在370～1300nm范围内,测量了不同波长的主折射率和有效倍频系数。计算出相位匹配角φ_Ⅰ,φ_Ⅱ,得到DSS晶体相对于KDP晶体d_(36)的d_(31)和d_(32)值。倍频效率约为KDP晶体的3.5倍,光损伤阈值大于200MW/cm~2。晶体的抗潮解性能比KDP型晶体稍好,所以用DSS晶体制作1.06μ激光器的倍频元件有一定的使用价值.     

PMMA/凝胶玻璃复合材料作为非线性有机分子掺杂基质的研究

对分散红1（DR1）掺杂聚甲基丙烯酸甲酯（PMMA）／凝胶玻璃复合材料的光学二阶非线笥及其热稳定性进行了研究。结果表明,PMMA／凝胶玻璃作为一种有机／无机复合材料,是介于胶玻璃和PMMA之间的一种非线性有机分子掺杂基质。随复合材料中凝胶玻璃含量增多,所制备的非线性材料的热稳定性能变好。对非线性和热稳定性的折衷考虑,获得了制备光学二阶非线笥基质材料先体PMMA和正硅酸乙酯（TEOS）的最佳混合比例。     

半花菁LB膜的三阶非线性特性

本文利用Z扫描测量技术首次对半花菁LB膜的三阶非线性光学特性进行了研究.实验结果表明,LB多层膜中的半花菁分子具有较高的三阶非线性折射率n²=2.0×10^-8(esu),这主要是半花菁分子中π电子体系的贡献,并且由于532nm在其Q吸收带内,引起三阶非线性的共振增强效应,实验数据与理论拟合结果符合得很好.半花菁LB膜的三阶非线性的响应时间在30ns以内.     

配位键合Re(Opri)(TTA)2的发光有机玻璃的制备

配位键合Re(Opri)(TTA)2的发光有机玻璃的制备;配合物;有机玻璃;荧光性能     

掺三异丁氧基钬聚苯乙烯的性能

添加三异丁氧基钬的苯乙烯经本体聚合制备了掺钬聚苯乙烯新材料。用FT－IR、XPS、SEM、DTA－TG和DMTA等分析技术研究了钬对PS性能的影响,并测定了掺杂物的冲击强度。结果表明,掺钬聚苯乙烯中存在着Ho与苯环π电子之间的配位作用,掺钬聚苯乙烯的热稳定性随着钬含量的增加而提高,其冲击强度有明显提高,并在钬的质量分数为5.0%时达最高值,SEM和DMTA分析从微观上解释了稀土钬对聚苯乙烯的增韧机理。     

含水的凝胶电解质电化学特性及其在锂水电池中的初试

应用交流阻抗谱研究以聚甲基丙烯酸＿聚甲基丙烯酸锂＿甘油(GPE)作为锂水电池正极的体系,根据等效电路计算,发现升高温度和增加水含量均可提高体系的电导率.该体系导电过程类似于聚合物浓溶液,水分能降低聚合物的玻璃化温度,电解过程相当于电解水,分解电压1.50V.使用GPE组装室温全固态锂水电池,测定了该电池在恒负载(5.2kΩ)下放电曲线,发现当以石墨正极作集电极时,该电池能持续放电2h.使放电电压和放电电流下降的因素是:锂与GPE内水分反应生成的膜逐渐增厚,正极反应生成氢气,GPE内水份的扩散速率.     

RETGEM探测器的初步测试

研制了一种新型的带有阻抗性电极的TGEM——RETGEM(Thick GEM with Resistive Electrodes)探测器, 阻抗性电极可以有效地保护探测器和前端电子学免于偶尔放电的损伤。 对RETGEM探测器进行了初步测试, 其中包括计数率、能量分辨、增益以及打火率。 结果表明, 探测器达到了设计的基本要求。 In this study we present preliminary results from a new detector: a thick gaseous electron multiplier(GEM) with resistive electrodes. The resistive electrodes protect the detector and the front end electronics from damage by occasional discharges. In different gas mixtures, we test Thick GEM with Resistive Electrodes(RETGEM) detector for the first time, including counting rate, energy resolution, effective gain, and discharge probability. The results can satisfy the basic demand of RETGEM detector design.