再议塞曼效应的理论解释

塞曼效应是原子在磁场中能级和光谱发生分裂的现象. 采用3种方法对塞曼效应进行解释, 比较它们 的异同. 并着重运用微扰理论方法, 对正常塞曼效应和反常塞曼效应进行比较, 使学习者对塞曼效应本质的认识更 加深入     

微机塞曼效应仪与图象处理实验

微机塞曼效应仪与图象处理实验沙振舜，郗迈，冯小宁（南京大学物理系２１０００８）继电视显微密立根油滴仪研制成功之后，我们利用ＣＣＤ应用技术研制成微机电视显微塞曼效应实验仪，用它既可以做塞曼效应的实验或演示，又可作图象处理与分析的练习，实现了塞曼效应光谱...     

应用数码照相技术分析塞曼分裂图谱

讨论了现有塞曼效应实验成像方法的不足;介绍一种用普通数码照相机进行拍摄和计算机程序处理技术研究塞曼效应的方法.     

Zeeman效应中光偏振的实验研究

介绍一种永磁式塞曼效应实验仪，用其研究了任意方向上塞曼效应的光偏振态和光强问题，并测定了电子的ｅ／ｍ，给出了测量方法和结果．     

塞曼效应实验

介绍了塞曼效应的发展历史,总结了塞曼效应实验的理论教学重点、塞曼分裂谱线的偏振特性及其在磁共振实验中的应用,重点分析了实验过程中光路的等高共轴、光阑、会聚透镜等因素对法布里-珀罗标准具干涉条纹宽度和光场均匀度的影响,并对塞曼效应实验数据的处理方法提出了建议.     

塞曼效应实验系统评述

对塞曼效应实验系统各环节的作用、要求和关键作了分析和评述，指出了安排实验中应注意的问题，提出了观察不同谱线塞曼效应的建议．     

各种强度均匀磁场下氢原子定态问题统一求解

以简明的方式统一处理了塞曼效应，反常塞曼效应，帕邢－巴克效应以及中间强度均匀磁场下氢原子谱线的分分裂，移动和强度计算等问题。     

利用塞曼效应实验研究原子能级结构

本文结合“塞曼效应”实验和有关原子物理的知识给出一种研究原子能级结构的方法,旨在加深对塞曼效应的理解。     

汞谱线的塞曼效应分析与朗德g因子的测量

对汞谱线塞曼效应进行了理论分析,通过利用CCD观测系统获取了塞曼效应实验分裂干涉圆环图像,证明了实验现象与理论分析完全一致,并对实验数据进行处理,定量测量了朗德g因子,发现误差较小。     

塞曼效应仿真实验平台

塞曼效应实验是学生了解原子具有磁矩和空间取向量子化现象的重要实验,至今塞曼效应仍是研究能级结构的重要方法之一.为了能够让学生更加清楚地了解塞曼效应实验的基本原理和操作规程,针对教学中的重点和难点,运用flash软件制作出塞曼效应仿真实验.该程序可全程高度仿真实验过程,具有界面友好、易于操作、无需安装等优点.为实验教学提供了一种新的辅助方式.     

Act-and-wait time-delayed feedback control of autonomous systems

Recently an act-and-wait modification of time-delayed feedback control has been proposed for the stabilization of unstable periodic orbits in nonautonomous dynamical systems (Pyragas and Pyragas, 2016 [30]). The modification implies a periodic switching of the feedback gain and makes the closed-loop system finite-dimensional. Here we extend this modification to autonomous systems. In order to keep constant the phase difference between the controlled orbit and the act-and-wait switching function an additional small-amplitude periodic perturbation is introduced. The algorithm can stabilize periodic orbits with an odd number of real unstable Floquet exponents using a simple single-input single-output constraint control.     

The improved quantization rule and the Langer modification

An improved quantization rule is used to obtain a generalized formulation of Langer modification. The relations between the improved quantization rule and the Langer modification are studied. Two typical quantum systems, hydrogen atom and harmonic oscillator, are studied to show the relations between them.     

Scale-invariant Lyapunov exponents for classical hamiltonian systems

The Lyapunov exponent for classical hamiltonian systems is made dimensionless by introducing a characteristic time τ_c. This modification yields an energy-independent exponent for systems with scale invariance.     

Control of wettability of hydrogenated amorphous carbon thin films by laser-assisted micro- and nanostructuring

A flexible and rapid surface functionalization of amorphous carbon films shows a great potential for various application fields such as biological surfaces and tribological systems. For this purpose, the combination of thin film deposition and subsequent laser material processing was investigated. Amorphous carbon layers doped with hydrogen were deposited on silicon wafers by reactive direct-current magnetron sputtering. Films with three different hydrogen contents were synthesized. Subsequent to the thin film deposition process, UV laser material processing at wavelengths of 193 nm or 248 nm was performed with respect to chemical surface modification and surface structuring on micro- and nanometer scale. Depending on structure size and laser-induced chemical surface modification the adjustment of the surface energy and wetting behaviour in a broad range from hydrophobic to hydrophilic was possible. The chemical modification and the ablation mechanisms near the ablation threshold were strongly influenced by the hydrogen content in amorphous carbon thin films.Structural and chemical information of the as-deposited and modified films was obtained by Raman spectroscopy, X-ray photoelectron spectroscopy and contact angle measurements.     

Effective medium in dispersed systems

A structural analysis of effective medium formed by dispersed systems from the viewpoint of flux modification at large dispersions is presented. The effective medium coefficient is investigated for its parametric dependence and the effective properties are estimated through this dependence. This estimation covers all highly dispersed two-phase systems including the effect of container.     

On the nonlinear normal modes of free vibration of piecewise linear systems

A modification of the Shaw–Pierre nonlinear normal modes is suggested in order to analyze the vibrations of a piecewise linear mechanical systems with finite degrees of freedom. The use of this approach allows one to reduce to twice the dimension of the nonlinear algebraic equations system for nonlinear normal modes calculations in comparison with systems obtained by previous researchers. Two degrees of freedom and fifteen degrees of freedom nonlinear dynamical systems are investigated numerically by using nonlinear normal modes.     

Generalized Wigner Functions for Damped Systems in Deformation Quantization

Quantization of damped systems usually gives rise to complex spectra and corresponding resonant states, which do not belong to the Hilbert space. Therefore, the standard form of calculating Wigner function (WF) does not work for these systems. In this paper we show that in order to let WF satisfy a *-genvalue equation for the damped systems, one must modify its standard form slightly, and this modification exactly coincides with the resu lts derived from a *-Exponential expansion in deformation quantization.     

Generalized Wigner Functions for Damped Systems in Deformation Quantization

Quantization of damped systems usually gives rise to complex spectra and corresponding resonant states, which do not belong to the Hilbert space. Therefore, the standard form of calculating Wigner function （WF） does not work for these systems. In this paper we show that in order to let WF satisfy a ,-genvalue equation for the damped systems, one must modify its standard form slightly, and this modification exactly coincides with the results derived from a ＊-Exponential expansion in deformation quantization.     

Fluorescence Photobleaching Recovery Method with Pulse-Position Modulation of Bleaching/Probing Irradiation

The fluorescence photobleaching recovery method with pulse-position modulation (PPM) of bleaching/probing irradiation is presented. This approach is modification of previously announced photobleaching recovery under decaying photobleaching (FRDP) approach, which employs the amplitude control of irradiation intensity. Underlying idea was to solve the problem of setup nonlinearity by methodical modification that was successfully done. The irradiation intensity is series of equal bleach-probe pulses with increasing distance. The more sophisticated series was proposed as a convolution of subseries, which one characterizing its own time scale. It allows to detect the fluorescence kinetics in the wide range of time and of different nature simultaneously. The method was applied on model systems as FITC-HSA in the water/glycerol mixture and FITC-DMPE in the POPC multibilayers. The method allowed to detect and investigate diffusion processes, presence immobile fraction, effect of limited area of liposomes and reversible fluorescence kinetics.     

A Simple Approach to Study the Isospin Effect in Mass Splitting of Three-Nucleon Systems by Using Hyperspherical Functions

In this work, the binding energy and wavefunctions of three-nucleon systems are obtained by using hyperspherical harmonic approach. We have used a mathematical modification method to obtain the eigenvalues and eigenfunctions of Schrödinger equation for three-nucleon systems in calculation. Next, we have used a simple approach to obtain the difference between binding energy of ³H and ³He where gives us mass splitting of three-nucleon systems. We have compared our results with the other works and experimental values.