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《Molecular physics》2012,110(21-22):2773-2779
A preliminary analysis of the 2CH excitation band in C2H2–N2O in the 1.5 µm range (K. Didriche, C. Lauzin, P. Macko, M. Herman and W.J. Lafferty, Chem. Phys. Letters 469, 35 (2009).), only considering 117 low J-, and Ka - vibration-rotation lines, is significantly extended thanks to the analysis of new spectra including very regular series of lines with J/Ka up to 31/15. 1271 b-type lines were assigned. Perturbations are briefly discussed. The rotational temperature in the experiments is estimated to be 20?K and the upper state mean half-time is 1.6?ns for non perturbed levels. The previous analyses of the 2CH + torsion band in C2H2–N2O and in C2H2–CO2 (C. Lauzin, K. Didriche, T. Földes and M. Herman, Mol. Phys. 109, 2105 (2011).), are also extended to include 286 and 234 lines, respectively, also correcting for calibration errors. New rotational constants are obtained using a rigid rotor Hamiltonian by simultaneously fitting the ground, 2CH and 2CH + torsion states in C2H2–N2O, and the latter state, only, in C2H2–CO2. 相似文献
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《Journal of Molecular Spectroscopy》1987,124(2):437-442
Infrared measurements have been made on SO2 between 450 and 602 cm−1 with a resolution of 0.005 cm−1. The B-type bands due to the bending mode transitions 010-000 and 020-010 have been assigned and analyzed for the 32S16O2 molecule. A total of 3007 transitions were measured and fit for 32S16O2 with a standard deviation of 0.0004 cm−1. Ro-vibrational constants are given that fit the current measurements and the pure rotational transitions reported in the literature. 相似文献
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SystematicDiscrepancyoftheEnthalpiesofFormationBetweentheG2TheoreticalandtheExperimentalValuesforO+2
《原子与分子物理学报》1996,(4)
Keywords:SystematicDiscrepancyEnthalpyG2ExperimentIntroducedbyPopleandco-workers〔1-4〕,thewelknownG2abinitioprocedure,asarelia... 相似文献
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Czechoslovak Journal of Physics - 相似文献
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Mojtaba Rezaei N. Moazzen-Ahmadi A.R.W. McKellar 《Journal of Molecular Spectroscopy》2012,272(1):19-22
Infrared spectra of C2D2–water complexes are studied in the 4.1 μm region of the C2D2 ν3 fundamental band using a tunable diode laser source to probe a pulsed supersonic slit jet. Relatively large vibrational red shifts (?27.7 to ?28.0 cm?1) are observed which are more easily interpretable than for the analogous C2H2 vibration thanks to the absence of Fermi resonance effects for C2D2. Noticeable homogeneous line broadening leads to estimates of upper state predissociation lifetimes of about 0.5, 0.9 and 1.1 ns for C2D2–H2O, –HDO, and –D2O, respectively. Transitions involving Ka = 0 and 1 levels are observed for C2D2–HDO, but there is a puzzling absence of Ka = 1 for C2D2–H2O and C2D2–D2O. 相似文献
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Spectra of the weakly bound CO2–C2H2 and CO2–C2D2 complexes are observed in the regions of CO2 ν3 (≈ 2349 cm?1) and C2D2 ν3 (≈ 2440 cm?1) fundamental vibrations, using an infrared optical parametric oscillator to probe a pulsed supersonic slit-jet expansion. Five bands are measured and analysed: the fundamental asymmetric stretch of the C2D2 component, two combination bands involving the out-of-plane torsional vibrations (C2D2 ν3 + torsion and CO2 ν3 + torsion) for CO2–C2D2, and two combination bands involving an intermolecular in-plane bending vibration for CO2–C2H2 and CO2–C2D2. The resulting intermolecular frequencies are 61.408(1), 54.5(5), 39.9(5), and 39.961(1) cm?1 for CO2–C2H2 and CO2–C2D2 in-plane vibrations, and CO2–C2D2 out-of-plane torsional vibrations in CO2 and C2D2 regions, respectively. This is the first experimental determination of these intermolecular vibrational frequencies. 相似文献
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HUA Da-Yin WENG Xiao-Yan WANG Lie-Yan CHEN Ting 《理论物理通讯》2008,49(4):960-964
A lattice gas model is presented for the A2 +2B2 → 2B2A reaction system with particle diffusion in two dimensions. In the model, B2 dissociates in the random dimer-filling mechanism and A2 dissociates in the end-on dimer filling mechanism. A reactive window appears and the system exhibits a continuous phase transition from a reactive state to a "B + vacancy" covered state with infinitely many absorbing states. When the diffusion of particle B is considered, there are only two absorbing states. It is found that the critical behavior of the continuous phase transition changes from the directed percolation (DP) class to the pair contact process with diffusion (PCPD) class. 相似文献
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The temperature dependence of the Raman spectra of FeCl2 2H2O demonstrate the existence of level crossing and repulsion between a one-magnon and a nearby phonon excitation. The magnon-phonon coupling constant derived from a two oscillator decoupling technique shows the same variation with temperature as the measured sublattice magnetization. In addition the temperature dependences of the energies and of the half-widths of the uncoupled magnon and phonon states are derived and discussed.A project of the Sonderforschungsbereich 65 Festkörperspektroskopie Darmstadt-Frankfurt, supported by the Deutsche Forschungsgemeinschaft 相似文献
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与YBCO薄膜相比,Tl2Ba2CaCu2Ox薄膜具有更高的Tc和更好的抗湿性能,所以Tl2Ba2CaCu2Ox薄膜器件不仅在液氮温度下具有更好的稳定性,而且在室温下具有更长的存放寿命.我们用磁控溅射的方法分别在24°和36.8°的STO双晶衬底上外延出Tl2Ba2CaCu2Ox薄膜并制备成晶界结DC-SQUID,比较了二者由于晶界夹角不同而产生的性能差异,并给出可工作在95K的DC-SQUID干涉曲线;对工作在77K的Tl2Ba2CaCu2Ox和YBCO薄膜双晶DC-SQUID,比较了二者在噪声特性及临界电流和结电阻随温度变化等特性,并对结果作了讨论. 相似文献
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《Journal of Molecular Spectroscopy》1986,118(1):174-179
The 2ν2 band of 14N 16O2 has been observed for the first time in the infrared, leading to precise energies for the Ka = 0, 1, 2 rotational levels of the (0 2 0) vibrational state. These levels have been reproduced within the experimental uncertainty using a Hamiltonian which takes into account the Coriolis interactions between (0 2 0) and (0 0 1) and between (1 0 0) and (0 0 1). In this way a precise band center ν0 = 1498.3474 ± 0.0016 cm−1 has been determined as well as improved rotational and coupling constants. 相似文献
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勾秉聪 《原子与分子物理学报》1997,14(4):505-510
采用马鞍点变分方法和复数转动技术,计算了类锂离子2s2p2p2S三激发共振态的能量,并运用截断变分方法得到能量改进量,以及计算了相对论效应、质量极化效应,从而获得了高精度的能量计算值。还计算了该系统的Auger宽度,位移和辐射跃迁率。 相似文献
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为了研究超导材料中高温超导相颗粒的钉扎行为,在Ar气保护条件下,采用固相反应法制备了质量百分比为0,3,5和10%Bi2Sr2CaCu2O8含量的MgB2块状样品.用X射线衍射和扫描电子显微镜对样品进行了显微结构分析;用物理性能综合测试系统振动样品磁强计(最大磁场9T)测量了所有样品在不同磁场下的直流M(T)曲线,并测量了不同温度下的准静态磁化曲线,通过Bean临界态模型分析出Jc(H)曲线.随着掺杂量的增大掺杂后Tc基本不变,转变宽度略为增大;相比于未掺杂样品,掺杂量为3 wt%样品抗磁信号和临界电流密度有较大提高.显微结构分析结果表明,部分Bi2Sr2CaCu2O8分解为Cu2O和其它杂相,有部分Bi2Sr2CaCu2O8颗粒保留在样品内部,成为有效的钉扎中心.最后本文对超导体中的高温超导相颗粒的钉扎行为进行了分析. 相似文献
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为了研究超导材料中高温超导相颗粒的钉扎行为,在Ar气保护条件下,采用固相反应法制备了质量百分比为0,3,5和10%BizSr2CaCu2O8含量的MgB2块状样品.用X射线衍射和扫描电子显微镜对样品进行了显微结构分析;用物理性能综合测试系统振动样品磁强计(最大磁场9T)测量了所有样品在不同磁场下的直流M(T)曲线,并测量了不同温度下的准静态磁化曲线,通过Bean临界态模型分析出Jc(H)曲线.随着掺杂量的增大掺杂后Tc基本不变,转变宽度略为增大;相比于未掺杂样品,掺杂量为3wt%样品抗磁信号和临界电流密度有较大提高.显微结构分析结果表明,部分Bi2Sr2CaCu2O8分解为Cu2O和其它杂相,有部分Bi2Sr2CaCu2O8颗粒保留在样品内部,成为有效的钉扎中心.最后本文对超导体中的高温超导相颗粒的钉扎行为进行了分析. 相似文献
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《工程热物理学报》2016,(3)
Fenton体系中H_2O_2的添加方式直接影响着H_2O_2对·OH的消耗程度.本文采用多点投加装置,研究H_2O_2多点投加对Fe2+/H_2O_2体系氧化还原电位(Oxidation-Reduction Potential,ORP)的影响规律。研究发现,当添加点数增加时,溶液终态ORP增大。Fe~(3+)/Fe~(2+)电对是体系ORP的主要贡献物质。OH被捕捉后,体系ORP升高,可能是Fe~(3+)/Fe~(2+)的循环状态发生改变。温度升高,H_2O_2对·OH消耗增强,使得Fe~(3+)/Fe~(2+)的转化过程发生变化,溶液ORP升高。H_2O_2加入溶液的时间尺度,会影响体系ORP的增长过程及终态值,实验发现时间尺度为4 min时最佳,原因在于其它体系中Fe~(2+)不能充分转变成Fe~(3+),因而体系ORP增长较慢,稳定时体系ORP数值较低。 相似文献
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采用高温固相法合成了BaZnP2 01:Eu2 ,Mn2 荧光粉,并对其发光性质及Eu2 对Mn2 的能量传递机理进行了研究.Eu2 和Mn2 在380 am和670 nm的发射峰分别由Eu2 的5d-14f跃迁和Mn2 的4T1(4G)-6A1(6S)跃迁产生.Eu2 对Mn2 的发光有很强的敏化作用,根据Dexter电多极相互作用的能量传递概率公式,判断出BaZnP2O7中Eu2 对Mn2 的能量传递属于电偶极-电四极相互作用引起的共振能量传递. 相似文献
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《原子与分子物理学报》2001,(1)
1 INTRODUCTIONIn1933,PaulingexplainedtheexistenceofmetastableHe2 2intermsofcovalentionicmixingofthestructuresHe He (repulsive)andHe2 He(attractive).Thispapersignalsthebeginningofaseriesofpublicationsondoublychargeddiatomicmolecules.Doublychargedmolecularcati… 相似文献