能级跃迁

利用能级跃迁理论分析了三能级系统的光敏剂分子，建立了各能级的粒子数随时间衰变的关系；

Making use of energy level transition theories we analyze the three level energy system of a photosensitive molecule to build up decay traces of every energy level particle population .

阴极放电实验中，对原子能级跃迁分支系数比值随磁场强度的变化进行计算。

In the cathode discharge experiment , energy level transition we calculate the branching coefficient ratios as the magnetic field strength changes .

简要地讨论了Tm3＋：YVO4光吸收能级跃迁性质。

The absorption transition characteristics of Tm 3 + : YVO 4 have been discussed briefly .

通过XRD和XPS分析认为荧光增强的主要原因同粉体中铈主要以Ce3+形式存在有关，新的发光峰可能来源于ZnOCeO2界面处形成的新的能级跃迁。

PL enhancement of nanocomposite powder was correlated with more oxygen vacancies which were caused by Ce 3 + . The new peak at 603 nm is attributed to new energy transition in the interface of CeO_2 / ZnO .

计算了各个能级跃迁的谱线强度、振子强度、吸收截面等，进而计算了3H4和3F4态的自发跃迁概率、辐射寿命、荧光分支比和积分发射截面，并对结果进行了分析。

The lifetime , branching ratio and integrated stimulated-emission cross section were obtained and the results were discussed .

基于NH3分子在近红外波段振转能级跃迁机制，作者将1.5μmGRIN-ROD外腔InGaAsPBH激光器频率锁定到NH3吸收谱线上，它的波长是15196。

Due to the vibration-rotation transition of NH3 molecules at near-infrared waveband . The frequency of 1.5 μ m GRIN-rod external cavity InGaAsP BH laser is locked to one of the absorption lines . Its wavelength is 15196A .

根据激光二极管纵向抽运Tm，Ho：YLF激光器的能级跃迁和能量传递过程，在考虑能量传递上转换的情况下，建立了准三能级阈值速率方程，得出了激光器阈值的解析解。

Based on the energy transfer between ions and the transition between energy levels of diode-end-pumped Tm , Ho : YLF laser , under the consideration of energy transfer up-conversion , the threshold rate equations are given , and the analytical formulas of laser threshold are deduced from rate-equations .

其次，在第一章阐述的理论知识基础上，给出了强电场激光场中的狄拉克哈密顿量，并且用WKB近似法计算出二能级跃迁振幅。

Secondly , on the basis of the theoretical knowledge in the first chapter , we obtained the Dirac Hamiltonian in the strong electric field , and used the WKB approximation to calculate the two-level transition amplitude .

本文讨论了影响碱金属原子光谱精细结构强度分布的主要因素：①原子在单位时间内从m能级跃迁到n能级的几率Amn；

The paper discusses the main factors that influence the intensity distribution of fine structure of alkali metal ′ s atomic spectra : ① the probability A mn of the atom that leaps from the m level to the n level in the unit time ;

测试了不同掺杂浓度的Yb：Ca3（VO4）2晶体的偏振吸收光谱，非偏振吸收光谱，荧光光谱，计算了Yb3+的2F7/2-2F5/2能级跃迁的发射截面，辐射跃迁几率，辐射寿命等光谱参数。

The polarization absorption spectra , the non-polarization absorption spectra and fluorescence spectra of Yb : Ca3 ( VO4 ) 2 crystal were measured . The spectra parameters of these crystals can be calculated .

同时测试了Yb：Er：Ca3（VO4）2晶体的偏振吸收光谱与非偏振荧光光谱，用J-O理论计算了Er3+各能级跃迁的光谱参数，并讨论了Yb3+-Er3+之间的能量转移过程。

And the polarization absorption spectra and non-fluorescence spectra of Yb : Er : Ca3 ( VO4 ) 2 crystal were also measured . The spectra parameters can be calculated according to the J-O theory . Energy transfer between Yb3 + and Er3 + were investigated .

根据实验结果，给出了钙铀云母的能级跃迁图。

An energy level diagram of autunite is presented from the experimental results .

Rb~（87）基态超精细塞曼能级跃迁的偏振激发特性

Polarization of rb_ ( 87 ) ground state hyperfine structure Zeeman energy level

现在我把波长和，氢原子中的，能级跃迁联系起来。

Now I have lambdas associated with transitions between energy levels in atomic hydrogen .

从激光介质中光能量的传输方程和描述脉冲激光的能级跃迁速率方程出发，研究了激光介质对抽运光的吸收特性。

The theoretical solution of the pump light absorption of a laser medium is presented .

类锂离子氯、钙、钪的能级跃迁几率和振子强度的计算

Study of transition and oscillator strength for Li-like ions of cl , ca and SC element

研究了交叉耦合效应，即一个强的激光场同时耦合两个或三个能级跃迁。

We studied the cross coupling effect via two or three transitions coupled simultaneously by one strong laser field .

分析表明，可以用简单的纯失相强度相关衰减因子来等效地分析复杂的多能级跃迁体系的退相干特性。

The calculation results show that the simple intensity-dependent damping factor of pure dephasing can well describe the decoherence properties of complex multi-level system .

探讨了在合成NaYF4：Yb3+/Er3+/Tm3+过程中，Yb3+、Er3+和Tm3+的掺杂浓度、水热温度、反应时间等因素对发光性质和强度的影响，以及上转换发光过程中的能级跃迁和能量传递过程。

The influence of nature and intensity of luminescence and up-conversion light-emitting energy in the process of transition and the energy transfer process were also discussed .

目前绝大多数光学原子钟的探索方案都是利用能级跃迁的吸收谱来观测钟跃迁，它们都必须依赖于很窄线宽的激光光源。

However , most schemes for optical atomic clock are focused on the opti-cal transition profiles of absorption peaks , which demanding narrow line-width laser source .

一定数目的俘获原子组成的系综，在高极化极限下，原子内部能级跃迁与光场的耦合导致原子的集体激发，原子之间是全同的。

The coupling between the atoms in an ensemble and the light field will deduce the collective excitation of atoms in the limit of large polarization .

以往的激光器是由束缚电子的能级跃迁而产生相干辐射的。

The generation of the coherent radiation in a conventional laser results from the transitions between the quantum states of the electrons , which are attached to the atoms .

由钕离子的四能级跃迁的速率方程理论，推出了阈值功率的表达式，并且对近阈值条件下和强泵浦条件下的激光输出功率做了理论预测；

The four-energy-level velocity rate equation is illustrated and so is the expression of threshold power . The laser power on the condition of near-threshhold and powerful pumping is estimated .

在谱线形成计算中考虑了较多的因素，如氢&氦混合气体的多能级跃迁问题、轨道运动引起的密度非径向分布问题等，并在轨道形状方面做了一些简化。

We develope a method to calculate the multiple transitions in the hydrogen and helium mixture gases and treat the distribution of the density as non-radial distribution resulting from the orbital motions .

分析了气体辐射的特性，包括辐射与组成气体的原子或分子的能级跃迁、振动&转动谱线和谱线展宽之间的关系，以及光学厚度和普朗克函数对于气体辐射计算的意义和计算方法。

The main points in the dissertation are as follows : ( 1 ) The dissertation Analyses the properties of gas radiation , and the computation of optical depth and Planck function .

本文利用古典模型讨论了原子两个能级跃迁时，谱线的自然宽度、碰撞宽度、多普勒宽度。最后将这三种宽度因子写成了统一的形式。

The natural width , collision width and Doppler width of spectral line during the transition of two energy levels of atoms are discussed by using classical model and a unite form is given to the three width factors .

并且这种上转换发光强度随着Tm3+浓度的增强而降低，但对应不同能级跃迁的发光强度降低的幅度不同，这是因为Er3+和Tm3+之间的相互作用。

All the upconversion intensities ( decreased ) when Tm ~ ( 3 + ) concentration increased , but the relative intensity decrease was different due to the interaction between Er ~ ( 3 + ) and Tm ~ ( 3 + ) .

PdⅩⅣ-CdⅩⅥ离子4s~24p~3和4s4p~4组态精细结构能级与跃迁的扩展分析

Extended analysis of fine-structure energy levels of 4s ~ 24p ~ 3 and 4s4p ~ 4 for ions from Pd ⅹⅳ to Cd ⅹⅵ

在弱光信号作用下，利用转动波近似（RWA），给出了二能级原子跃迁几率的解析表达式，并讨论了几种典型脉冲光场的分布。

In a weak optic field , we can get an analysic expression of the high level probability , further mort , we discuss several typical optic pulse field .

分立K能级激光跃迁的连续调谐范围约为30GHz。

The tuning range covered more than 70 % of the emission spectrum from 90 to 93 μ m , and the continuous tuning range associated with individual K-level transitions is about 30 GHz .