PERTURBED SPATIAL DARK SOLITONS

Effect of perturbations on spatial dark optical solitons is studied analytically with a novel direct perturbation approach for dark solitons. The problems of two-photon absorption and gain with saturation are reconsidered. The corresponding shifts of the soliton centers which have never been obtained by previous theories are given.     

大学物理实验课程的通识教育探究——以“拉伸法测定弹性材料的杨氏模量”为例

“大学物理实验”课程是理工科学生较早接触的实验操作类课程,涵盖了力学、热学、电学、磁学、光学等多个分支领域。华东师范大学大学物理实验教学团队在实验教学中坚持将学科知识和通识元素有机融合,将综合育人的理念贯穿始终。本文以“拉伸法测定弹性材料的杨氏模量”为例,从“实验背景、目标要点、通识融入、案例挖掘”入手,探讨如何在大学物理实验教学过程中实施通识教育,以期兼顾“授业解惑和传道育人”,践行立德树人的教育初心。     

离子和原子共面不对称(e,2e)三重微分截面的比较

本文用自旋平均静态交换势三体扭曲波波恩近似(DWBA)计算了Li+(1s2)和He(1s2)、K+(3p6) 和Ar(3p6)在1?000?eV入射能下的共面不对称(e, 2e)三重微分截面(TDCS).通过比较离子和原子靶三重微分截面的角分布,表明两体碰撞图像在离子靶的情形不成立.     

乙烷分子价壳层电离能谱和动量谱测量

The binding energy spectra and momentum profiles for the valence shells of ethane have been measured by using multichannel EMS spectrometer. The results are compared with the available experimental and theoretical results. The present result of the experimental momentum profile of 3a1g has an obvious minimum as predicted by the theoretical calculations.     

Dissociative ionization cross sections of CO2 at electron impact energy of 5 keV

The dissociative ionization of CO2 induced by 5 keV electrons in two-body and three-body dissociative channels of CO2＋2 and CO3＋2 is identified by the ion-ion coincidence- method using a momentum imaging spectrometer. The partial ionization cross sections （PICSs） of different ionic fragments are measured and the results generally agree with the calculations made by a semi-empirical approach. Furthermore, the PICSs of the dissociative channels are also obtained by carefully considering the detection efficiency of the micro-channel plates and the total transmission efficiency of the time of flight system.     

脯氨酸分子构象的双空间分析

本文主要讨论了脯氨酸分子最稳定的四种构象的束缚能谱和轨道电子动量分布。计算出的几何构型和偶极矩等分子特征与以前的实验和理论计算结果均很好的符合。双空间分析就是用基于B3LYP/TZVP密度泛函计算出的位置空间来研究其束缚能谱,用基于平面波近似下的动量空间来研究其价壳层轨道电子动量分布,并从构象之间的转换来解释不同构象轨道（HOMO：31a,NHOMO-1：30a和HOMO-2:29a）波函数差异。     

延长Rb原子退相干时间镀膜材料的可行性研究

实验测量了镀石蜡Rb池和石英玻璃Rb池中Rb原子自旋态寿命. 研究表明,镀石蜡Rb池的Rb原子自旋态寿命在温度T=50℃约为7　ms,而在同样温度的石英玻璃池中,Rb原子自旋态寿命仅为20 μs. 这为基于自旋的量子存储实验提供了很好的借鉴. 同时讨论了其他候选的材料来隔绝碱金属原子和容器壁的非弹性碰撞相互作用. 根据实验结果,我们认为H原子布于笼状结构内部的C₆₀H₆₀以及BN材料有较大的实用前景.     

在时域实验研究扩散诱导的Ramsey压窄

基于Duan-Lukin-Cirac-Zoller(DLCZ)方案,在时域上研究了扩散诱导的Ramsey压窄. 以⁸⁷Rb热原子系综为研究对象,观测到缓冲气体,激光束尺寸和镀石蜡Rb池均可以导致Ramsey压窄现象. 实验结果和文献中重复相互作用模型预期的一致.     

Electron Momentum Distributions of the Highest Occupied Molecular Orbital of CF3Br： Delocalization of Halogen Lone-Pair Orbitals

The highest occupied molecular orbital (HOMO) of trifluorobromomethane (CF3Br) is studied by binary (e,2e)electron momentum spectroscopy. The experimental momentum profile of the HOMO is compared with the Hartree-Fock (HF) and density functional theory (DFT-B3LYP) calculations. The calculated results largely depend on the size of basis sets rather than theoretical methods. Both the HF and DFT calculations using the 6-311 G^** basis set give a good explanation to the experiment. Delocalization of halogen lone-pair orbitals in the series molecules CF3X (X=F, Cl, Br) has been investigated.     

单原子分子测控的进展

单原子分子测控是近年来发展起来的实验技术 ,其操作对象是单个的原子或分子。完整的单原子分子测控包含了对单原子分子的成像、识别、操纵和组合分解四个方面。本文分别对这四个方面进行了系统综述 ,介绍了国内外相关技术的发展和现状 ,并对其未来做了展望