用激光照射氢原子或反氢原子，观察何种波长的光线被吸收了，可以通过这种办法来详细地比较这两种原子的能级。
By shining laser light onto hydrogen or antihydrogen and observing which wavelengths are absorbed, the energy levels of the two can be compared in detail.
通过紫外线光电子光谱和光学吸收的测量，研究人员测定了纳米晶体中电子的最低激发态能级。
By using UV photoelectron spectroscopy and optical absorption measurements, the researchers determined the energy of the lowest excited electronic states in the nanocrystals.
当这些能级中，发生电子跃迁时，这些电子便吸收并释放出不同特定频率的光。
When electrons jump between these energy levels, they absorb and emit light of particular frequencies.
我们从一个低能级开始，到一个高能级去，这意味着需要吸收一个光子，我们要获得能量。
We start at this lower energy state and go up that means we need to absorb a photon, we have to take in energy.
适量的能量撞击电子时，电子将吸收能量并跳跃至高能级轨道。
Hit it with just the right amount of energy, and it will absorb it, and the electron will jump up to a higher energy level.
此外还测定了单重态和单-三重态间的吸收系数之比以及能级间的碰撞转移几率之比。
Besides, the ratio of the absorption coefficients between singlet states and singlet-triplet states, and that of probability of collision energy-transfer were measured.
计算结果表明它能有效地克服中间能级近共振所产生的多普勒背景，并有效地区分单光子饱和吸收讯号和双光子跃迁讯号。
The results show that the Doppler background due to the near resonance of the intermediate level is eliminated and the signal of two-photon transition can be distinguished from saturation absorption.
辐射强度由存在准费米能级差的体积的吸收率决定。
The emission intensity is given by the absorptance of the volume in which there is a difference of the quasi Fermi energies.
在V型能级系统原子介质中，若利用外场产生相干，则弱光场在该介质中的吸收-色散关系将展现出新的特性。
A new feature will be exhibited in the absorption-dispersion relation if quantum coherence is induced by an external field in the medium consisting of atoms of V-type energy-level configuration.
当上能级粒子数处于未反转分布态时，具有较大的发射截面与吸收截面比值的波长信道拥有相对较大的增益竞争优势。
When the upper state population is not reversed, the channel with greater ratio of emission and absorption cross-section has greater competitive advantage.
通过对酒精透射光谱和吸收光谱的研究发现，其特征吸收峰随浓度不同发生漂移，从分子结构能级角度对其做了定性解释；
The transmission spectrum and the absorption spectrum of alcohol shows that the characteristic absorption peak shifts with alcoholicity due to the molecular configuration.
与三能级原子系统相比，四能级原子相干效应即可导致电磁感应透明的产生，也可产生电磁感应吸收现象，取决于控制光的强度和第四个能级衰变率的大小。
Compared with three-level atomic system, the atomic coherence effects in four-level can lead to EIT and EIA, which depend on the intensity of control light and the relaxation of the fourth level.
对四能级饱和与反饱和吸收介质的简并四波混频和全息随时间的变化行为进行了理论分析。
The temporal behavior of DFWM and holography in four-level saturable and reverse saturable absorbers was analysed theoretically.
实验表明深能级的引入有利于开关对长波限激光脉冲的吸收。
The experiment indicate that the deep energy trap is benefit to increase the ability of GaAs photoconductive switches absorbing long wavelength limit laser pulse obviously.
采用TNP，DNP和DND这三种基组所得的能级和态密度可用于分析光吸收，光电子发射等实验数据。
The energy levels calculated with the TNP, DNP and DND basis sets can play important roles in analyzing light absorption and photoemission experiments.
结合循环伏安曲线图及五甲川菁的光吸收阈值，初步确定五甲川菁染料电子基态和激发态能级位置。
The ground state level and the excited state level of the dye were determined by using the cyclic voltammetry and the optical absorption spectroscopy.
抽运光的吸收饱和使激光器运转时激光下能级的粒子数减小，吸收系数下降，激光器的输出功率较低。
Pump absorption saturation makes the population of the lower pump level and the absorption coefficient decrease, and the output power is lower.
电声相互作用对电子能级的修正导致光吸收系数峰值向高能方向偏移。
Furthermore, the correction of electron-phonon interaction effect on the energies of the electron makes the peak shift to the aspect of the high energy.
电声相互作用对电子能级的修正导致光吸收系数峰值向高能方向偏移。
Furthermore, the correction of electron-phonon interaction effect on the energies of the electron makes the peak shift to the aspect of the high energy.
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