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搜索结果: 1-15 共查到知识库 原子光谱学相关记录69条 . 查询时间(2.234 秒)
主要研究了热原子蒸气池中铯Rydberg原子nS1/2→(n+1)S1/2微波耦合的双光子光谱.铯原子基态(6S1/2)、第一激发态(6P3/2)、Rydberg态(69S1/2)形成阶梯型三能级系统,弱探测光作用于基态到激发态6S1/2→6P3/2的跃迁,强耦合光则作用于6P3/2→69S1/2的Rydberg跃迁形成电磁感应透明(EIT)效应,实现对Rydberg原子的光学探测.频率fMW=1...
对氧化铁颗粒进行了X射线衍射谱(XRD)测量和正电子湮没寿命谱(PALS)测量,分别运用Jade和Lifetime软件拟合数据,研究了纳米氧化铁颗粒的结构、缺陷以及自由电子密度.XRD测量结果表明了氧化铁是简单六方晶系,空间群是R-3c(167),其相应的点阵常数分别是三个基矢的长度a=b=0.530 42 nm,c=1.374 60 nm.PALS测量结果表明了正电子在氧化铁材料中的寿命成分有三...
Plant water stress can limit productivity and has an effect on plant physiology and canopy architecture. Changes in water status of a canopy can have indirect effects on remotely sensed optical refl...
提出了一种矢量维数分割量化的超光谱图像压缩算法,通过维数分割将矢量分为几个部分,然后利用哈达玛变换的性质,在哈达玛域内单独设计每个部分的码书。设计过程中采用最优矢量量化器设计原则,并结合分步判断排除不等式算法与LBG(Linde Bazo Gray)聚类算法快速生成矢量量化过程的最终码书,使各个部分的码书性能达到最优,改善整体码书的性能。实验表明,这种算法在码书尺寸相同的情况下,图像的恢复质量以及...
A new method, 'Resolved-Super-Transition-Arrays', for calculation of the spectral absorption coefficient in hot plasmas is presented. The formulae of the traditional Super-Transition-Arrays method [A....
We present a diagrammatic derivation of the coherent backscattering spectrum from two two-level atoms using the pump-probe approach, wherein the multiple scattering signal is deduced from single-atom ...
We present a measurement of the helicity of the W boson produced in top quark decays using t¯t decays in the ℓ+jets and dilepton final states selected from a sample of 5.4 fb−1 of co...
We have measured a graphene double quantum dot device with multiple electrostatic gates that are used to enhance control to investigate it. At low temperatures the transport measurements reveal hone...
The effect of an electric field on spin precession in In0.5Ga0.5As/GaAs self-assembled quantum dots is calculated using multiband real-space envelope-function theory. The dependence of the Land´...
We report on the magnetic and phononic excitation spectrum of Sr3Cr2O8 determined by THz and infrared (IR) spectroscopy, specific heat, and electron spin resonance measurements. We identify the singl...
Mass of the P-wave cs-scalar-diquark ¯c¯s-scalar-antidiquark state is computed in the framework of QCD sum rule. The result 4.64 ± 0.25 GeV is in good agreement with the experimental value o...
We calculate the cross sections and final state distributions for the processes e+e− !(1S)(+−,K+K−, 0) near the (5S) resonance based on the tetraquark hypothesis. This framew...
The implications for the Dilaton stabilization problem are investigated when the effective potential for this field is generated by the existence of a massive fermion. The previously evaluated two loo...
We derive a theoretical description for dilute Bose gases as a loop expansion in terms of composite- eld propagators by rewriting the Lagrangian in terms of auxiliary elds related to the normal and a...
Growth of GaAs and InxGa1􀀀xAs nanowires by the group-III assisted Molecular Beam Epitaxy growth method is studied in dependence of growth temperature, with the objective of maximizing the ind...

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