Line Positions and Intensities in the 2nu(2)/nu(4) Vibrational System of (14)NH(3) near 5-7 µm

Line positions and intensities belonging to the vibrational system 2nu(2)/nu(4) of ammonia (14)NH(3) are measured and analyzed between 1200 and 2200 cm(-1) in order to improve the molecular database. For this, laboratory spectra are obtained at 0.006 and 0.011 cm(-1) unapodized resolution and with 4% precisions for the intensities using Fourier transform spectrometers located at the Kitt Peak National Observatory and the Jet Propulsion Laboratory. The observed data contain transitions of the nu(4) fundamental band near 1626.276(1) and 1627.375(2) cm(-1) (for s and a inversion upper states, respectively) and the 2nu(2) overtone band near 1597.470(3) and 1882.179(5) cm(-1) (for s and a inversion states, respectively). A total of 2345 lines with J' 相似文献   

Analysis of the pseudoscalar partner of the Y(4660) and related bound states

In this article, we study the pseudoscalar bound state η _c ′f ₀(980) (irrespective of the hadro-charmonium and the molecular state) with the QCD sum rules. Considering the SU(3) symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states η _c ′σ(400?1200), η _b '''f ₀(980) and η _b '''σ(400?1200), and make reasonable predictions for their masses.     

Structure Analysis of the l/η(1440)

By an amplitudes analysis of the KKπ system in the J/ψ radiative decay to the K⁺K^－π^O and the K⁰_SK^±π⁺ final states, we find that there is one 0^－+ resonance (M=1467±3MeV,Γ=89±6MeV) and two 1⁺⁺ resonances (M=1435±3MeV,Γ=59±5MeV and M=1497±2MeV,Γ=44±7MeV), Which are consistent with the η(1440), the f₁(1420), and the f₁(1510).     

Analysis of average primary gamma-transition intensities and cross sections of the113Cd(n, γ) reaction

A combined analysis of the available data on the primaryγ-ray intensities from the¹¹³Cd(n, γ) reaction atE _n=1.9 and 24.3 keV neutron energies together with the data on¹¹³Cd neutron capture cross sections in theE _n=3–200 keV energy region was carried out. The neutron strength functions were determined asS _n0=(0.260±0.073) 10^?4 and S_n1=(5.06±0.67) 10^?4. No spin-orbit splitting of thep-wave neutron strength function was found. The energy dependence of theE 1 radiative strength function {ie147-01} was fitted by the Kadmenski-Furman model somewhat better than by a standard Lorentzian. TheM 1 giant resonance parameters were obtained as E _G ^{M 1} =8.8±1.6 MeV and Γ _G ^{M 1} = 4.7±2.6 MeV. The neutron capture cross section of¹¹³Cd from its isomeric state ({ie147-02}=11/2^?, E ₁ ^m =263.7 keV) was calculated.     

Analysis of Trapping Force and Torque for Fiber-optical Trap by the Finite-differential Time-domain (FDTD) Method

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　ＳｉｎｃｅＡｓｈｋｉｎｅｔａｌ.[1] ｐｒｏｐｏｓｅｄｔｈｅｏｐｔｉｃａｌｔｒａｐｐｉｎｇｏｆｄｉｅｌｅｃｔｒｉｃｐａｒｔｉｃｌｅｓｂｙａｓｉｎｇｌｅ ｂｅａｍｇｒａｄｉｅｎｔｆｏｒｃｅｔｒａｐ ,ｏｐｔｉｃａｌｔｗｅｅｚｅｒｓｔｅｃｈｎｏｌｏｇｙａｒｏｕｓｅｄｔｈｅｉｎｔｅｒｅｓｔｏｆｒｅｓｅａｒｃｈｅｒｓ,ｈｏｗｅｖｅｒｔｈｅｉｒａｔｔｅｎｔｉｏｎｗａｓｃｏｎｃｅｎｔｒａｔｅｄｏｎｈｉｇｈＮＡｍｉｃｒｏｌｅｎｓｔｗｅｅｚｅｒｓ.Ｏｐｔｉｃａｌｔｒａｐｐｉｎｇｔｅｃｈｎ…     

Analysis of the high-resolution 5-μm spectra of the ν4(E) and 2ν2(A1) bands of 12CD3F

The infrared spectrum of the ν₄(E) and 2ν₂(A₁) bands of ¹²CD₃F have been recorded and deconvolved to ∼0.005 cm⁻¹ resolution. More than 1890 transitions have been assigned to one of the 37 subbands (−18≤KΔK≤+18) comprising the spectrum of the ν₄ band with a maximum assigned J value of 41. The weak 2ν₂(A₁) band has never been reported in the infrared prior to this work. A total of 358 transitions in K ≤ 8 subbands have been assigned to the 2ν₂ band. The two bands are members of the 24 interacting state complex of ¹²CD₃F spectra in the 5-μm region. The ν₄ and 2ν₂ spectra are highly perturbed, exhibiting local and global resonances. Effective parameters of the two bands were obtained by fitting the data in a restricted manner leaving out the obviously perturbed transitions. The effective parameters, the identification of the different resonances affecting the bands, and estimates of some of the coupling constants are reported.     

Painleve Analysis and Symmetries of the Hirota–Satsuma Equation

Abstract

The singular manifold expansion of Weiss, Tabor and Carnevale [1] has been successfully applied to integrable ordinary and partial differential equations. They yield information such as Lax pairs, Bäcklund transformations, symmetries, recursion operators, pole dynamics, and special solutions. On the other hand, several recent developments have made the application of group theory to the solution of the differential equations more powerful then ever. More recently, Gibbon et. al. [2] revealed interrelations between the Painlevè property and Hirota’s bilinear method. And W. Strampp [3] hase shown that symmetries and recursion operators for an integrable nonlinear partial differential equation can be obtained from the Painlevè expansion. In this paper, it has been shown that the Hirota–Satsuma equation passes the Painlevé test given by Weiss et al. for nonlinear partial differential equations. Furthermore, the data obtained by the truncation technique is used to obtain the symmetries, recursion operators, some analytical solutions of the Hirota–Satsuma equation.     

Interpretation of Z_b(10610)and Z_b(10650)in the ISPE mechanism and the Charmonium Counterpart~

The initial single pion emission(ISPE) mechanism is applied to the processes γ(55)→πB~((*))B~((*)),whose details have been recently reported at ICHEP2012,and we obtain reasonable agreement with Bell's measurements;that is,we succeed in reproducing the enhancement structures of Zb(10610) and Zb(10650).Inspired by this success,we also predict the corresponding enhancement structures in open charm one-pion decays of higher charmonia near the thresholds of D*D and D*D*.     

New Structures and Atomistic Analysis of the Polymorphism for the ∑ = 5 (210) [001] Tilt Boundary

Using interatomic potentials derived from the second moment approximation of the tight-binding scheme, we study the relative stabilities for the different structures of the = 5 (210) [001] tilt boundary in Cu and Ag. Relatively to the numerous previous studies, we obtain two new structures characterised by a larger periodicity along the tilt axis. Depending on the metal and on subtle features of the potentials, we show a very significant evolution of the relative stabilities. Using a local analysis on the different sites of the grain boundary, we link the stability of a given structure to peculiar features of the interatomic potential and to physical properties of the metal.     

Analysis of the common characteristics of the Hartmann,Ronchi, and Shack–Hartmann tests

An overview of the settings of the planes for the filters and observed patterns in the Hartmann and Ronchi tests is presented. Also a new set of filters for both test were developed. In a similar way, it is easy to extend this analysis to the Shack–Hartmann test, and to propose a new Null Shack–Hartmann filter.     

Absolute Line Intensities in the 2nu(0)(2) Band of Cyanogen Chloride at 12.8 µm

Absolute line intensities were measured at high resolution with a tunable diode laser. This work concerns the 2nu(0)(2) band of cyanogen chloride ClCN in the region 780 cm(-1). Thirty-two absorption lines were recorded for the isotopomer (35)ClCN and 26 lines for (37)ClCN. From the analysis of these lines, we determined the bandstrengths: S(0)(v) = 19.14 cm(-2) atm(-1) for (35)ClCN and S(0)(v) = 17.84 cm(-2) atm(-1) for (37)ClCN. Copyright 2000 Academic Press.     

Calculation of vibrations of the H-bonds and electrooptical parameters of the F(HF)2]− complex

The problem of calculating the vibrations of the F(HF)₂]^? complex with hydrogen bonds is considered with allowance for the anharmonicity and interaction of motions in different degrees of freedom. A systematic solution of this problem is proposed which consists in separating the total vibrational system into subsystems, obtaining sufficiently exact vibrational wave functions of subsystems, and expanding the vibrational wave functions of the total system in basis functions constructed from the wave functions of subsystems. At the first stage of our study, the stretching and bending modes of two F...HF hydrogen bonds are considered with the use of an exact kinetic energy operator and a nonempirical three-dimensional potential energy surface. It is shown that these vibrational modes of the complex are characterized by significant mechanical and electric anharmonicities. The calculated values of frequencies of the symmetric and antisymmetric vibrations of hydrogen bonds are in good agreement with the experimental findings.     

The Analysis and Improving of the Microwave Exciter in the Lower Hybrid Wave System

When we carry out lower hybrid wave heating and current driving plasma experiment at tokamak, we need mega-watt order of microwave power. The microwave signal at frequency of 2450 MHz is generated by a microwave exciter. According to the experiment＇s demands, the microwave exciter must provide output power of 1.5～ 2. 5 W with stabilized frequency and amplitude tobe used as the klystron input. Being amplified by the klystron, the microwave signal is transmitted through the transmitting system to the antenna and is emitted into the HL-2A tokamak. So we can see that the microwave exciter＇s function is very important to the lower hybrid wave heating and current driving plasma experiment.     

Analysis of the interaction between the ? meson and nucleus

In this study, we systematically investigate the ? meson and nucleus interaction by analyzing and fitting the cross sections of \begin{document}$ \gamma N $\end{document}\begin{document}$ \rightarrow \phi $\end{document}N reactions near the threshold, where N represents the nucleus. Using the vector meson dominant model, the distribution of the ?-N scattering length is presented as a function of energy, and the results show that there is a slight increase in scattering length with increasing energy. Based on this, the average scattering length of a ?-proton is obtained as\begin{document}$ 0.10\pm0.01 $\end{document} fm by combining experimental data and theoretical models. Moreover, the average scattering length of the ?-deuteron interaction is derived to be \begin{document}$ 0.014\pm0.002 $\end{document} fm for the first time. Furthermore, the effect of the momentum transfer \begin{document}$|t_{{\rm min}}|$\end{document} on the ?-N scattering length at the threshold is discussed. The obtained results not only provide important theoretical information for a more comprehensive and accurate study of the ?-N scattering length, but also a basis for future experimental measurements of ? meson production.     

Effect of the mesons σ* and Φ and the variety of U(N)Σ on the transition density of hyperon stars

The effect of the mesons σ* and φ and the variety of U(N)Σ on the transition density of hyperon stars is examined within the framework of relativistic mean field theory for the baryon octet {n,p,∧,∑-,∑0,∑+,Ξ- and Ξ0} system.It is found that,compared with that without considering the mesons δ* and φ,the transition density of hyperon stars decreases,the critical baryon density that hyperons Σ-,Σ0,Ξ+,Ξ- and Ξ0 appears to decrease too,but for A the effect is not obvious.As U(N)Σ goes up,the critical baryon density of Σ+,Σ0 and Σ- increases,that of Ξ0 decreases and that of A and Ξ- is fixed.In addition,it is found that the variety of U(N)Σ almost does not influence the transition density.     

A Thermodynamic Analysis of the Validity of Wenzel and Cassie＇s Equations ＊

Wettable properties of a considered solid on its contact angle （CA） can be analyzed theoretically using the classical Wenzel and Cassie＇s equations. However, recent strong interest in superhydrophobic surfaces has demanded a re-examination of the applicability of the two equations. We report a thermodynamic analysis to determine the universality, in particular, the limitations of the two equations. Using some special surfaces, we demonstrate that the two equations are valid for micro-scale heterogeneous structures, however they are invalid for macro-scale heterogeneous surfaces. Furthermore, the present calculations suggest that fundamental thermodynamic analysis is the most powerful and reliable approach to determine the comprehensive wettability for various structurally patterned surfaces.     

Density functional study of the decomposition pathways of SiH? and GeH? at the Si(100) and Ge(100) surfaces

By means of first-principles calculations we studied the decomposition pathways of SiH? on Ge(100) and of GeH? on Si(100), of interest for the growth of crystalline SiGe alloys and Si/Ge heterostructures by plasma-enhanced chemical vapor deposition. We also investigated H desorption via reaction of two adsorbed SiH?/GeH? species (β? reaction) or via Eley-Rideal abstraction of surface H atoms from the impinging SiH? and GeH? species. The calculated activation energies for the different processes suggest that the rate-limiting step for the growth of Si/Ge systems is still the β? reaction of two SiH? as in the growth of crystalline Si.     

Normal Coordinate Analysis of the Tricyanomethanide ion C(CN)− 3 (D3h)

Abstract

A complete normal coordinate analysis has been performed for the tricyanomethanide ion C(CN)^? ₃ for which a planar structure of symmetry D_3h was assumed. The symmetric Fand internal f valence force constant matrices were derived in the general case by using a GVFF and the results are applied to C(CN)^? ₃.