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基于量子力学理论和D2的零点振动能, 计算出了D2的低模式能量, 分析判断出了发生振转能量跃迁概率最大模式. 利用自主研制的低温平面冷冻靶系统和低温红外测量系统, 制备出了光滑、均匀、透光性好的平面固体氘膜, 测得了其红外吸收谱. 其中吸收明显的峰位主要由于Q1(0)+S0(0), Q1(0)+S0(1), Q1(0)+S0(0)+S0(1) 振动、转动模式构成.实验结果与理论计算结果一致.
关键词:
固体氘
振转跃迁
红外加热
红外光谱 相似文献
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使用密耦近似(Close-Coupling)方法、采用Tang-Toennies势模型计算了惰性气体原子Ne与H2分子及同位素D2分子在碰撞能量为83.8 meV时的微分散射截面及分波截面, 并与实验值和文献值进行比较.计算得到的微分散射截面值与实验值符合得较好,分波截面值与文献值也相符合.使用同样的方法和模型,文中对Ne-H2(D2,T2)三个体系的微分截面和分波截面进行了系统计算和比较分析,得出对称同位素替代碰撞体系的散射截面规律.
关键词:
2(D2')" href="#">Ne-H2(D2
2)碰撞')" href="#">T2)碰撞
Tang-Toennies势模型
密耦方法
同位素替代 相似文献
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首先在前文的基础上,对于用激光根据“光核、光带比”(D2/D1)来测定磨削工件表面光洁度的原理加以系统总结,然后按照经验关系Rx=5Ra(对于▽7以上光洁度),确定了表面随机高度的概率密度函数中的衰减系数。对于有限负指数型函数P1(h)={e(-b(|h|/hm)) 当|h|≤hm; 0 当|h|>hm, 定出b=1.23,对于正则型函数P2(h)=e(-a2(h/hm)2) 定出a2=2.分别讨论了以上两种函数中hm的物理意义(皆对应于1/2Rz)将前文中公式加以精确改进后,对P1(h)和P2(h)分别计算了D2/D1与Rx的关系曲线,即绝对定标曲线。最后还计算了衍射图样半强度宽与Rx的关系曲线。
关键词: 相似文献
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利用密度泛函理论(DFT)计算得到了五氯苯酚(PCP)分子在基态(S0态)、第一电子激发态(S1态)和离子基态(D0态)优化的结构参数和简谐振动频率值.通过分析PCP分子在激发和电离过程中的苯环与取代基OH和Cl之间的键长和键角的变化情况,可以看到取代基OH和Cl的给电子和吸电子效应使苯环的结构发生了变化,尤其是靠近Cl原子处的变化较明显.通过分析每个简谐振动模式对应的振动频率值在激发和电离过程中的变化情况,可以看到PCP分子在S0态和D0态的同一振动模式对应的振动频率值接近,在S1←S0跃迁中,PCP分子中约二分之一的平面内弯曲和平面内伸缩振动受到的影响较大,而平面外弯曲振动受到的影响较小. 相似文献
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Structural Evolution of D5h(1)-C90 under High Pressure:A Mediate Allotrope of Nanocarbon from Zero-Dimensional Fullerene to One-Dimensional Nanotube 下载免费PDF全文
The hybridization of fullerene and nanotube structures in newly isolated C90 with the D5 h symmetric group(D5 h(1)-C90) provides an ideal model as a mediating allotrope of nanocarbon from zero-dimensional(OD) fullerene to one-dimensional nanotube.Raman and infrared spectroscopy combined with classical molecular dynamics simulation were used to investigate the structural evolution of D5 h(1)-C90 at ambient and high pressure up to35... 相似文献
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Intensity dependent polarization change and rotation of elliptically polarized light are observed and analyzed in the D1 and D2 resonance lines of sodium. The characteristics of these effects in terms of the difference between self- and cross- saturation coefficients are discussed for transitions with arbitrary values of total angular momentum J. 相似文献
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James R. Gillis Ronald D. Blatherwick Francis S. Bonomo 《Journal of Molecular Spectroscopy》1985,114(1):228-233
The infrared spectrum of ν2 of D2S was recorded from 740 to 1100 cm?1 on the University of Denver 50-cm FTIR spectrometer system. We have assigned 655 transitions from D232S and 129 from D234S, and have analyzed them using Watson's A-reduced Hamiltonian evaluated in the Ir representation. We used the recently published D232S and D234S ground state Hamiltonian constants [C. Camy-Peyret, J. M. Flaud, L. Lechuga-Fossat and J. W. C. Johns, J. Mol. Spectrosc.109, 300–333 (1985)]. Upper state Hamiltonian constants were obtained from a fit of the ν2 transitions, keeping the ground state constants fixed while varying the upper state constants. The standard deviation of the D232S ν2 fit is 0.0025 cm?1. The standard deviation of the D234S ν2 fit is 0.0041 cm?1. 相似文献
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M. Abu-Kharma 《Journal of Molecular Spectroscopy》2005,232(2):369-374
Enhancement spectra of the collision-induced absorption (CIA) in the first overtone region 5000-7000 cm−1 of D2 in D2-N2 were studied at 298 K for a base density of D2 of 73 amagat and for partial densities of N2 in the range 150-370 amagat. The observed spectra were modeled with a total of 1176 components of double vibrational transitions. Binary and ternary absorption coefficients were determined from the integrated absorption of the band. Profile analysis of the spectra was carried out using the Birnbaum-Cohen line-shape function for the individual components of the band, and characteristic line-shape parameters were determined from the analysis. Good agreement was obtained between the experimental and calculated spectral profiles. 相似文献
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S. Southworth W.D. Brewer C.M. Truesdale P.H. Kobrin D.W. Lindle D.A. Shirley 《Journal of Electron Spectroscopy and Related Phenomena》1982,26(1):43-51
The photoelectron asymmetry parameters of H2 and D2 have been measured using synchrotron radiation over the photon energy range 19–27 eV. The results are compared with previous measurements and several theoretical calculations. A few of the theoretical calculations are in good agreement with experiment, but most of them predict asymmetries which are too large. Essentially identical β values were measured for H2 and D2. This result is discussed in terms of differences which could arise due to vibrational and rotational structure. 相似文献
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A.F. Leung 《Journal of Physics and Chemistry of Solids》1977,38(5):529-532
A slight D3d distortion on the octahedral UF6? complex splits the Γ'8 and Γ8 octahedral levels into four doublets. These doublets and other electronic levels of the CsUF6 ground configuration have been identified according to their vibronic side-bands. In the calculation of the crystal field Hamiltonian, the amount of D3d distortion on the UF6? octahedron is treated as the parameter, Δ. The interactions of the 5f electron of the UF6? complex contains five parameters: ξ5f, B20, B40, B60 and Δ. The calculated energy spectrum and the g-tensor of the ground state show good agreement with the experimental measurements. 相似文献
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Mass spectroscopic studies reveal the role of H2 in HCN-laser plasma. This is confirmed by laser experiments with different gas mixtures containing H2 and D2. 相似文献
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R. McLeary 《Physics letters. A》1983,99(8):363-366
The collision-induced fluorescence from vibrationally excited D2 in high-pressure mixtures of D2 and Ar has been investigated. Fluorescence intensity and vibrational lifetime have been measured as a function of total gas density and mixture ratio. 相似文献
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Bi Peng Xie Duan Lin Wei Wang Kai Liu Jiang-Ping Tang Yong-Jian Yang Xiang-Dong Lei Hai-Le 《中国物理 B》2013,22(3):34401-034401
A specific-wavelength infrared (IR) light (λ=3140 nm) was irradiated into a solid D2 ice prepared in a cylinder target cell. The temperature in the solid D2 ice oscillated periodically with a high amplitude when irradiated by the IR light. The temperature oscillation has been well explained based on the two-dimensional heat transfer theory plus the IR-irradiation effect. The transmission optical imaging reveals that such a temperature oscillation is favorable to recrystallize the solid D2 ice from multicrystal to quasi single crystal. This suggests an efficient method to layer the solid hydrogen-isotope ice for the inertial-confinement-fusion (ICF) experiments. 相似文献
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The coadsorption of PH3 with H2, D2, O2 and H2O on Rh(100) has been studied using temperature programmed desorption (TPD), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). The adsorption and molecular desorption of PH3 is not affected by preadsorbed H2, D2 and O2. Preadsorbed PH3 blocks H2 desorption sites while postdosed PH3 displaces H2 (D21) from the Rh(100). When D2 and PH3 are coadsorbed, no D appears in desorbed phosphine. Preadsorbed O2 reduces the amount of H2 desorption (from PH3 decomposition) and increases the H2 desorption temperature. There is also some reaction between O(a) and H(a) to form water. Preexposure to H2O decreases the extent of PH3 adsorption and of PH3 decomposition. 相似文献
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Slow ion production cross sections for collisions of H+3 and D+3 ions with H2 and D2 have been measured at collision energies between 100 eV and 500 eV. The values vary from 2 × 10-17 cm2 to 6 × 10-17 cm2. The smaller cross sections for D3 projectiles may be explained as an internal energy effect. 相似文献