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sodium atoms
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  钠原子
     The laser beam from a pulsed tunable dye laser is tuned to the resonance line of sodium 3~2S_(1/2)-3~2P_(1/2)((?) =16961cm~(-1)) to excite the sodium atoms in a hydrogen-acetylene flame.
     把脉冲可调谐染料激光器的激光调谐到钠原子3~2S_(1/2)—3~2P_(1/2)的共振激发线(ν=16961cm~(-1)),激励火焰中的钠原子
短句来源
     Ethylene molecules were excited to high vibrational states through multiphoton excitation by TEA CO_2 laser, then collided with Sodium atoms.
     TEA CO_2激光将乙烯分子激发到高振动态,振动激发乙烯分子与基电子态钠原子碰撞发生振动—电子(V-E)能量转移,使钠原子处于电子激发态.
短句来源
     LASER RESONANCE IONIZATION (LRI) TRANSITION AND EFFICIENCY FOR SODIUM ATOMS
     钠原子激光共振电离(LRI)跃迁及其电离效率
短句来源
     Model potential calculations of diamagnetic spectra of Rydberg sodium atoms
     里德堡钠原子抗磁谱的模型势计算
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     A new title macrocycle L and its complex [NaClO4·L]2 have been synthesized and characterized. The crystal structure of the complex shows that two L direct coordinate two sodium atoms,rcspectively,and two perchloraec μ2-O bridges make them form a sandwich dimeric structure unit.
     本文合成和表征了一种新的标题大环L和它的配合物[NaClO4·L]2.配合物的晶体结构表明,两L分别与两钠原子直接配位,并通过两高氯酸根的两μ2-O桥形成了夹心型双聚结构单元.
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  na原子
     A perturbation method is used to evaluate the energy levels and oscillator strengths of sodium atoms (m=-2,π2=+)in a strong magnetic field.
     本文使用一种微扰法计算强磁场中的Na原子(m=-2,z宇称π=+)在强场混合区的能级位置和振子强度。
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     Two photon excitation of the ground state sodium atoms using a cw dye laser populated the Na (5S) state in the K Na vapor mixtures.
     在Na-K混合蒸汽中,利用染料激光器,将基态Na原子双光子激发到5S态。
短句来源
     This paper reports the experimental observation of the higher states' fluorescence changing with laser power,which was populated through energy polling collisions between two excited sodium atoms excited to the first excited state by a CW single mode laser in sodium vapor.
     报道了用连续单模激光器将Na原子共振激发至 3P态 ,观察到通过Na(3P) -Na(3P)能量积聚碰撞过程布居的高激发态荧光随激发光功率的变化关系。
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     It indicates that the three silicon atoms,which are in the same trigonal plane of the most stable structure with D3h symmetry for Si5 cluster,have surplus bonding abilities. Thus,they can bond with three hydrogen,lithium,and sodium atoms and six hydrogen atoms to form four stable compounds,i.
     结果表明,Si5原子簇中最稳定的具有D3h对称性的结构中,位于同一平面上的3个Si原子确实具有剩余的成键能力,可以与3个H,Li,Na原子和6个H原子形成稳定的化合物.
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  “sodium atoms”译为未确定词的双语例句
     LASER-ENHANCED IONIZATION SPECTROSCOPY OF SODIUM ATOMS
     钠原子的激光增强电离光谱研究
短句来源
     ACID EFFECT ON LASER-ENHANCED IONIZATION SIGNAL OF SODIUM ATOMS
     酸对钠原子的激光增强电离信号影响的研究
短句来源
     Sodium is thus sensitively detected by nonresonance fluorescence induced by saturated excitation of sodium atoms produced by the laser beam. The detection limit reached is 10~(-11) g/ml.
     通过激光饱和激励感生非共振荧光光谱方法进行钠原子的灵敏检测,实际的检测限可达10~(-11)g/ml。
短句来源
     REMARKS ON QUANTUM BEAT EXPERIMENT OF HIGHLY EXCITED SODIUM ATOMS
     高激发态钠原子的量子拍实验的某些分析
短句来源
     e. ,Si5H3,Si5H6,Si5Li3,and Si5Na3.Although the hydrogen,lithium,and sodium atoms are in the same main group,they bond with the silicon atoms of the Si5 cluster by different ways,and the additions also have various influences on the trigonal bipyramid structure of Si5.
     研究还发现,虽然H,Li和Na都属同一主族,但它们与Si5原子簇中Si原子的键连方式却不同,而且它们的加入,对Si5原子簇的"三角双锥"结构也有不同的影响.
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  sodium atoms
The replacement of potassium atoms by sodium atoms is accompanied by the contraction of the structure along the a and c axes.
      
The parameter b (the direction of channels in the structure) is insensitive to the substitution of sodium atoms for potassium atoms.
      
The interatomic interaction potentials derived from new precision spectroscopic data are used to calculate averaged collision cross sections of two sodium atoms.
      
The concentration of sodium atoms in the 2P3/2 and 2P1/2 excited states is ~5 × 106-5 × 108 cm-3.
      
The observed high-speed clouds of sodium atoms are assumed to have been formed through ionization, ion acceleration by the bidirectional electric fields of Alfvén waves in the Io-Jupiter current tube, and their neutralization.
      
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The crystal structure of sodium tetraselenite has a monoclinic unit cell with a=5.90A, b=4.82A, c=10.19A, β = 91°20', which contains 2 {NaH3(SeO2)2}. The space group is Gs2-Pn.The equatorial Weissenberg photograph h0l indicates that the projection of the structure onto the plane (010) has a pseudo plane group p6m and a pseudo unit cell with a' = 5.94A, b'=5.90A, r' = 119°50'. The pseudo plane group helped to fix the selenium and sodium atoms in the projection (Figure 1) and the Patterson projectionP(v,...

The crystal structure of sodium tetraselenite has a monoclinic unit cell with a=5.90A, b=4.82A, c=10.19A, β = 91°20', which contains 2 {NaH3(SeO2)2}. The space group is Gs2-Pn.The equatorial Weissenberg photograph h0l indicates that the projection of the structure onto the plane (010) has a pseudo plane group p6m and a pseudo unit cell with a' = 5.94A, b'=5.90A, r' = 119°50'. The pseudo plane group helped to fix the selenium and sodium atoms in the projection (Figure 1) and the Patterson projectionP(v, w) gave the values of their y coordinates. Then, the selenium and sodium atomswere seen to be distributed according to the space group C2h5 - P21/m. The oxygenatoms were located by a modified Fourier method. The Fourier projections p(x,z) and p(y, 2) (Figure 2 and 3) confirm the structure (Table 2 and Figure 4) satisfactorily.The pyramidal molecule SeO(OH)2 and ion [SeO2(OH)]- in the crystal correspond to the symmetrical structure formulaerespectively, where Se-OH = 1.75-1.82A and Se = O = 1.66-1.69A (Figure 5). The molecules SeO(OH)2 and ions [SeO2(OH)]- are linked through the hydrogen bonds O-H…O = 2.46-2.83A to form infinite chains of composition H3(SeO3)2 (Figure 6) and these chains are held together laterally by the sodium ions between them. The sodium ions are coordinated octahedrally by oxygen atoms (Figure 7).

单斜晶体NaH_3(SeO_3)_2的晶胞参数为α=5.90(?),b=4.82(?),c=10.19(?),β=91°20′。晶胞中含有2{NaH_3(SeO_3)_2}。密度的计算值和观测值各为3.22_4和3.21±0.01克/厘米~3。根据系统消光,晶体结构中存在着滑移面n。最后根据全部原子的坐标值肯定晶体的空间群为C_3~2—Pn。 根据Weissenberg图hOl上各衍射点的分布情况,可为结构在(010)面上的投影引出一个a′=5.94(?),b′=5.90(?),γ′=119°50′的假六方单位,投影的假二维空间群为p6m。假六方单位的a′=1/2(c-α),b′=α如图1中所示。Patterson投影P(u,w)肯定了图1中Se和Na原子的x,z坐标,而P(v,w)给出了它们的y坐标。从这些坐标值看来,晶体中的Se和Na原子系按空间群C_(2h)~5-P2_1/n分布。依靠上述重原子的坐标值并按空间群C_2h~5计算了电子密度分布函数ρ(x,z)和ρ(y,z)。计算结果指出,晶胞中的O原子系按空间群C_3~2分布。最后按空间群C_3~2对上述电子密度分布函数逐步进行修改,使O原子有了明确的表...

单斜晶体NaH_3(SeO_3)_2的晶胞参数为α=5.90(?),b=4.82(?),c=10.19(?),β=91°20′。晶胞中含有2{NaH_3(SeO_3)_2}。密度的计算值和观测值各为3.22_4和3.21±0.01克/厘米~3。根据系统消光,晶体结构中存在着滑移面n。最后根据全部原子的坐标值肯定晶体的空间群为C_3~2—Pn。 根据Weissenberg图hOl上各衍射点的分布情况,可为结构在(010)面上的投影引出一个a′=5.94(?),b′=5.90(?),γ′=119°50′的假六方单位,投影的假二维空间群为p6m。假六方单位的a′=1/2(c-α),b′=α如图1中所示。Patterson投影P(u,w)肯定了图1中Se和Na原子的x,z坐标,而P(v,w)给出了它们的y坐标。从这些坐标值看来,晶体中的Se和Na原子系按空间群C_(2h)~5-P2_1/n分布。依靠上述重原子的坐标值并按空间群C_2h~5计算了电子密度分布函数ρ(x,z)和ρ(y,z)。计算结果指出,晶胞中的O原子系按空间群C_3~2分布。最后按空间群C_3~2对上述电子密度分布函数逐步进行修改,使O原子有了明确的表现,并取得了图2和图3中的结果。晶胞中各原子的坐标值按空间群C_3~2列于表2中。晶体结构示出于图4中。 晶体中三角锥形的分子SeO(OH)_2和离子[SeO_2(OH)]各相当于对称结构式 其中Se—OH=1.75—1.82(?),Se=O=1.66—1.69(?)(图5)。分子SeO(OH)_2和离子[SeO_2(

We investigated the near resonant scattering and collision induced fluorescence of sodium atoms with doublet excited states in a weak laser field. By changing the frequency of the incident light and measuring the integral intensities of the components of the scattered light, the near resonant excitation cross-section of each sublevel was obtained as functions of the frequency detuning. Their variations are qualitatively explained by the interaction potential between the sodium atom and various collisional...

We investigated the near resonant scattering and collision induced fluorescence of sodium atoms with doublet excited states in a weak laser field. By changing the frequency of the incident light and measuring the integral intensities of the components of the scattered light, the near resonant excitation cross-section of each sublevel was obtained as functions of the frequency detuning. Their variations are qualitatively explained by the interaction potential between the sodium atom and various collisional perturbing species. We have measured the variation of the induced D1 and D2 fluorescence with laser power, density of sodium atoms and pressure of buffer gas. It is shown that the relation is linear. The experimental results are in agreement with the theory.

本文研究了具有双重激发能级的钠原子系统在惰性气体碰撞微扰下对单色光的近共振散射。在不同的入射光频率下,通过对散射光各分量积分强度的测量,得出了每个能级激发截面随着偏调的变化规律,从钠原子与不同的碰撞微扰体相互作用势定性地说明了这些规律。

A few analytical expressions for the observables in a quantum beat experiment is derived, which can be used to describe the experimental results and to obtain the fs splitting in sodium D states. The, change of the n2D states of sodium atoms in a weak electric field is also discussed.

本文推导了一个量子拍实验中观察量的解析表式,与实验对比可得n~2D态钠原子的精细裂距,其它特征也与实验符合。同时还讨论了上述高激发态钠原子在弱电场中的能态变化特性,指出了观察此特性的可能实验方法。

 
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