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Thermal Transport in Methane Hydrate by Molecular Dynamics and Phonon Inelastic Scattering 被引量:2
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作者 王照亮 苑昆鹏 唐大伟 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第10期72-75,共4页
The heat conduction and thermal conductivity for methane hydrate are simulated from equilibrium molecular dynamics. The thermal conductivity and temperature dependence trend agree well with the experimental results. T... The heat conduction and thermal conductivity for methane hydrate are simulated from equilibrium molecular dynamics. The thermal conductivity and temperature dependence trend agree well with the experimental results. The nonmonotonic temperature dependence is attributed to the phonon inelastic scattering at higher temperature and to the confinement of the optic phonon modes and low frequency phonons at low temperature. The thermal conductivity scales proportionally with the van der Waals interaction strength, The conversion of a crystal-like nature into an amorphous one oecurs at higher strength. Both the temperature dependence and interaction strength dependence are explained by phonon inelastic scattering. 展开更多
关键词 Thermal Transport in Methane Hydrate by Molecular Dynamics and Phonon inelastic scattering THZ
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Geometric Scaling Analysis of Deep Inelastic Scattering Data Including Heavy Quarks
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作者 吴庆东 曾吉 +3 位作者 胡元元 李权波 周代翠 向文昌 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第1期31-35,共5页
An analytic massive total cross section of photon proton scattering is derived, which has geometric scaling. A geometric scaling is used to perform a global analysis of the deep inelastic scattering data on inclusive ... An analytic massive total cross section of photon proton scattering is derived, which has geometric scaling. A geometric scaling is used to perform a global analysis of the deep inelastic scattering data on inclusive structure function F2 measured in lepton-hadron scattering experiments at small values of Bjorken x. It is shown that the descriptions of the inclusive structure function F2 and longitudinal structure function FL are improved with the massive analytic structure function, which may imply the gluon saturation effect dominating the parton evolution process at HERA. The inclusion of the heavy quarks prevent the divergence of the lepton-hadron cross section, which plays a significant role in the description of the photoproduction region. 展开更多
关键词 of on in Geometric Scaling Analysis of Deep inelastic scattering Data Including Heavy Quarks that IS DATA been HAVE THAN from
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Analysis of the Diffractive Deep Inelastic Scattering Data with Running Coupling and Gluon Number Fluctuations
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作者 向文昌 胡志海 +2 位作者 刘万松 彭俊金 蔡绍洪 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第8期33-37,共5页
We study the effects of running coupling and gluon number fluctuations in the latest diffractive deep inelastic scattering data. It is found that the description of the data is improved once the running coupling and g... We study the effects of running coupling and gluon number fluctuations in the latest diffractive deep inelastic scattering data. It is found that the description of the data is improved once the running coupling and gluon number fluctuations are included with x2/d.o.f. = 0.867, x2/d.o.f. = 0.923 and x2/d.o.f. = 0.878 for three different groups of experimental data. The values of diffusive coefficient subtracted from the fit are smaller than the ones obtained by considering only the gluon number fluctuations in our previous studies. The smaller values of the diffusive coefficient are in agreement with the theoretical predictions, where the gluon number fluctuations are suppressed by the running coupling which leads to smaller values of the diffusive coefficient. 展开更多
关键词 of QCD Analysis of the Diffractive Deep inelastic scattering Data with Running Coupling and Gluon Number Fluctuations in is that with
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Differential Cross Sections and Collision-Induced Rotational Alignment in Inelastic Scattering of NO(X)by Xe
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作者 Mark Brouard Helen Chadwick +6 位作者 Sean DSGordon Cornelia GHeid Balazs Hornung Bethan Nichols Jacek Klos Pablo GJambrina FJavier Aoiz 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2020年第2期217-233,I0003,J0001-J0017,共35页
Fully A-doublet resolved differential cross sections and collision-induced rotational alignment moments have been measured for the NO(X)-Xe collision system at a collision energy of 519 cm^-1.The experiments combine i... Fully A-doublet resolved differential cross sections and collision-induced rotational alignment moments have been measured for the NO(X)-Xe collision system at a collision energy of 519 cm^-1.The experiments combine initial quantum state selection,employing a hexapole inhomogeneous electric field,with quantum state resolved detection,using(1+1')resonantly enhanced multiphoton ionization and velocity map ion imaging.The differential cross sections and polarization dependent differential cross sections are shown to agree well with quantum mechanical scattering calculations performed on ab initio potential energy surfaces[J.Klos et al.J.Chem.Phys.137,014312(2012)].By comparison with quasi-classical trajectory calculations,quantum mechanical scattering calculations on a hard-shell potential,and kinematic apse model calculations,the effects of the attractive part of the potential on the measured differential cross sections and collision-induced rotational alignment moments are assessed. 展开更多
关键词 Chemical Physics Reaction dynamics inelastic scattering
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Formation of hydrogen atom in 2s state in proton–sodium inelastic scattering
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作者 Sabbah A.Elkilany 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第3期136-142,共7页
The inelastic collision of protons with sodium atoms are treated for the first time within the framework of the coupledstatic and frozen core approximations. The method is used for calculating partial and total cross-... The inelastic collision of protons with sodium atoms are treated for the first time within the framework of the coupledstatic and frozen core approximations. The method is used for calculating partial and total cross-sections with the assumption that only two channels(elastic and hydrogen formation in 2s state) are open. In each case, the calculations are carried out for seven values of the total angular momentum l(0≤ l≤ 6). The target is described using the Clementi Roetti wave functions within the framework of the one valence electron model. We use Lipmann–Swinger equation to solve the derived equations of the problem, then apply an iterative numerical method to obtain the code of computer to calculate iterative partial cross-sections. This can be done through calculating the reactance matrix at different values of considered energies to obtain the transition matrix that gives partial and total cross sections. The present results for total hydrogen(2s state)formation cross sections are in agreement with results of other available ones in wide range of incident energy. 展开更多
关键词 proton–sodium inelastic scattering hydrogen formation
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Analytic expression for the proton structure function in deep inelastic scattering 被引量:1
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作者 向文昌 周代翠 +1 位作者 万仁卓 袁显宝 《Chinese Physics C》 SCIE CAS CSCD 2009年第2期98-102,共5页
The analytic expression of proton in deep inelastic scattering is studied by using the color glass condensate model and the dipole picture. We get a better description of the HERA DIS data than the GBW model which was... The analytic expression of proton in deep inelastic scattering is studied by using the color glass condensate model and the dipole picture. We get a better description of the HERA DIS data than the GBW model which was inspired by the Glauber model. We find that our model satisfies the unitarity limit and Froissart Bound which refers to an energy dependence of the total cross-section rising no more rapidly than ln^2 s. 展开更多
关键词 deep inelastic scattering color glass condensate proton structure function
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Double folding analysis of ^(3)He elastic and inelastic scattering to low lying states on ^(90)Zr,^(116)Sn and ^(208)Pb at 270 MeV
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作者 Marwa N.El-Hammamy 《Chinese Physics C》 SCIE CAS CSCD 2015年第3期15-18,共4页
The experimental data on elastic and inelastic scattering of 270 MeV 3He particles to several low lying states in 90Zr, 116Sn and 208Pb are analyzed within the double folding model (DFM). Fermi density distribution ... The experimental data on elastic and inelastic scattering of 270 MeV 3He particles to several low lying states in 90Zr, 116Sn and 208Pb are analyzed within the double folding model (DFM). Fermi density distribution (FDD) of target nuclei is used to obtain real potentials with different powers. DF results are introduced into a modified DWUCK4 code to calculate tbe elastic and inelastic scattering cross sections. Two cboices of potentials form factors are used; Woods Saxon (WS) and Woods Saxon Squared (WS2) for real potential, while the imaginary part is taken as phenomenological Woods Saxon (PWS) and phenomenological Woods Saxon Squared (PWS2). This comparison provides information about the similarities and differences of the models used in calculations. 展开更多
关键词 elastic and inelastic scattering double folding squared fermi density distribution Woods SaxonSquared potential modified DWUCK4
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Simulation of neutron-tagged deep inelastic scattering at EicC
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作者 Gang Xie Meng-Yang Li +2 位作者 Cheng-Dong Han Rong Wang Xurong Chen 《Chinese Physics C》 SCIE CAS CSCD 2021年第5期19-28,共10页
Measuring the pionic structure function is of high interest, as it provides a new area for understanding the strong interaction among quarks and testing QCD predictions. To this end, we investigate the feasibility and... Measuring the pionic structure function is of high interest, as it provides a new area for understanding the strong interaction among quarks and testing QCD predictions. To this end, we investigate the feasibility and expected impact of a possible experiment at EicC(Electron-ion collider in China). We show the simulation results on the statistical precision of an EicC measurement, based on the model of leading neutron tagged DIS process and the parton distribution functions of the pion from JAM18 global analysis. The simulation shows that at EicC, the kinematics cover the x π range from 0.01 to 1, and the Q2 range from 1 to 50 GeV2, within the acceptable statistical uncertainty. Assuming an integrated luminosity of 50 fb-1, in the low-Q2 region(< 10 GeV2), the Monte Carlo data show that the suggested measurement in the whole x π range reaches very high precision(< 3%). To perform such an experiment, only the addition of a far-forward neutron calorimeter is needed. 展开更多
关键词 PION structure function deep inelastic scattering electron-ion collider
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Deuteron inelastic scattering on ^(6)Li and ^(7)Li nuclei within the three-body cluster model
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作者 M.V.Egorov V.I.Postnikov 《Chinese Physics C》 SCIE CAS CSCD 2021年第1期286-296,共11页
The problem of the deuteron interaction with lithium nuclei,treated as a system of two coupled pointlike clusters,is formulated to calculate the cross sections of the d+Li reaction.The d+Li reaction mechanism is descr... The problem of the deuteron interaction with lithium nuclei,treated as a system of two coupled pointlike clusters,is formulated to calculate the cross sections of the d+Li reaction.The d+Li reaction mechanism is described using the Faddeev theory for the three-body problem of deuteron-nucleus interaction.This theory is slightly extended for calculation of the stripping processes ^6Li(d,p)^7Li,^7Li(d,p)^8 ,^6Li(d,n)^7 Be,and ^7Li(d,n)^8 Be,as well as fragmentation reactions yielding tritium,a-particles,and continuous neutrons and protons in the initial deuteron kineticenergy region Ed=0.5-20 MeV.The phase shifts found for d+^6Li and d+^7Li elastic scattering,as part of the simple optic model with a complex central potential,were used to find the cross sections for the 6^Li(d,yM)^8 and ^7Li(d,yE1)^9 Be radiation captures.The three-body dynamics role is also summarized to demonstrate its significant influence within the d+^7Li system. 展开更多
关键词 deuteron-Li Faddeev equation inelastic scattering cluster model
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Investigation of negative-parity states in ^(16)C via deuteron inelastic scattering
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作者 Z.W.Tan J.L.Lou +36 位作者 Y.L.Ye Y.Liu D.Y.Pang C.X.Yuan J.G.Li W.Liu Y.Jiang B.Yang L.C.Tao K.Ma Z.H.Li Q.T.Li X.F.Yang J.Y.Xu H.Z.Yu J.X.Han S.W.Bai S.W.Huang G.Li H.Y.Wu H.L.Zang J.Feng J.S.Wang Y.Y.Yang P.Ma Q.Hu Z.Bai Z.H.Gao F.F.Duan L.Y.Hu J.H.Tan S.Q.Sun Y.S.Song H.J.Ong D.T.Tran H.Y.Zhu B.L.Xia 《Chinese Physics C》 SCIE CAS CSCD 2022年第5期70-76,共7页
Two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse kinematics.Besides the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at ... Two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse kinematics.Besides the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at 6.89 MeV is observed for the first time.The inelastic scattering angular distributions of these two states are well reproduced by the distorted-wave Born approximation(DWBA)calculation with an l=1 excitation.In addition,the spinparities of the unbound states are discussed and tentatively assigned based on shell model calculations using the modified YSOX interaction. 展开更多
关键词 negative-parity states inelastic scattering ^(16)C
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Study of ~3He inelastic scattering on ^(13)C and ^(14)C at 37.9 MeV
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作者 M.N.El-Hammamy A.Attia +1 位作者 F.A.El-Akkad A.M.Abdel-Moneim 《Chinese Physics C》 SCIE CAS CSCD 2014年第3期22-25,共4页
The differential cross sections of elastic and inelastic scattering of ~3He ions on ^(13)C and ^(14)C have been studied at an energy of 37.9 MeV with a double folding model based on M3Y-Reid effective nucleon-nucl... The differential cross sections of elastic and inelastic scattering of ~3He ions on ^(13)C and ^(14)C have been studied at an energy of 37.9 MeV with a double folding model based on M3Y-Reid effective nucleon-nucleon interaction.The resulted parameters have been used for the standard Distorted Wave Born Approximation calculations of angular distributions corresponding to different excitations levels of ^(13)C and ^(14)C and deformation parameters have been deduced. 展开更多
关键词 elastic scattering inelastic scattering double folding deformation parameter DWBA
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Oscillator strength study of the excitations of valence-shell of C2H2 by high-resolution inelastic x-ray scattering
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作者 Qiang Sun Ya-Wei Liu +5 位作者 Yuan-Chen Xu Li-Han Wang Tian-Jun Li Shu-Xing Wang Ke Yang Lin-Fan Zhu 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第5期261-264,共4页
The oscillator strengths of the valence-shell excitations of C_(2)H_(2) are extremely important for testing theoretical models and studying interstellar gases.In this study,the high-resolution inelastic x-ray scatteri... The oscillator strengths of the valence-shell excitations of C_(2)H_(2) are extremely important for testing theoretical models and studying interstellar gases.In this study,the high-resolution inelastic x-ray scattering(IXS)method is adopted to determine the generalized oscillator strengths(GOSs)of the valence-shell excitations of C_(2)H_(2) at a photon energy of10 ke V.The GOSs are extrapolated to their zero limit to obtain the corresponding optical oscillator strengths(OOSs).Through taking a completely different experimental method of the IXS,the present results offer the high energy limit for electron collision to satisfy the first Born approximation(FBA)and cross-check the previous experimental and theoretical results independently.The comparisons indicate that an electron collision energy of 1500 e V is not enough for C_(2)H_(2) to satisfy the FBA for the large squared momentum transfer,and the line saturation effect limits the accuracy of the OOSs measured by the photoabsorption method. 展开更多
关键词 C_(2)H_(2) inelastic x-ray scattering dynamic parameters
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Inelastic UV Scattering in a Floating Water Bridge
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作者 Elmar C. Fuchs Brigitte Bitschnau +3 位作者 Silvia Di Fonzo Alessandro Gessini Jakob Woisetschlager Filippo Bencivenga 《Journal of Physical Science and Application》 2011年第3期135-147,共13页
When high voltage is applied to distilled water filled into two beakers close to each other, a watery connection forms spontaneously, giving the impression of a floating water bridge [1-8]. In this work we present the... When high voltage is applied to distilled water filled into two beakers close to each other, a watery connection forms spontaneously, giving the impression of a floating water bridge [1-8]. In this work we present the first inelastic ultraviolet scattering data of such an electrohydrodynamic bridge revealing radial gradients of Stokes- and Anti-Stokes shifts and their intensity profiles. Interpretations including density and temperature changes within the bridge are discussed. The obtained data can be satisfactorily explained by the introduction of a second phase consisting of nano bubbles. Results and interpretation are discussed in relation to similar phenomena. 展开更多
关键词 inelastic UV scattering floating water bridge nano bubbles
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Mechanisms of Proton-Proton Inelastic Cross-Section Growth in Multi-Peripheral Model within the Framework of Perturbation Theory.Part 3
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作者 Igor Sharf Andrii Tykhonov +3 位作者 Grygorii Sokhrannyi Maksym Deliyergiyev Natalia Podolyan Vitaliy Rusov 《Journal of Modern Physics》 2012年第2期129-144,共16页
We develop a new method for taking into account the interference contributions to proton-proton inelastic cross-section within the framework of the simplest multi-peripheral model based on the self-interacting scalar ... We develop a new method for taking into account the interference contributions to proton-proton inelastic cross-section within the framework of the simplest multi-peripheral model based on the self-interacting scalar φ3 field theory, using Laplace’s method for calculation of each interference contribution. We do not know any works that adopted the inter- ference contributions for inelastic processes. This is due to the generally adopted assumption that the main contribution to the integrals expressing the cross section makes multi-Regge domains with its characteristic strong ordering of secon- dary particles by rapidity. However, in this work, we find what kind of space domains makes a major contribution to the integral and these space domains are not multi-Regge. We demonstrated that because these interference contributions are significant, so they cannot be limited by a small part of them. With the help of the approximate replacement the sum of a huge number of these contributions by the integral were calculated partial cross sections for such numbers of secondary particles for which direct calculation would be impossible. The offered model qualitative agrees with experimental dependence of total scattering cross-section on energy with a characteristic minimum in the range ≈ 10 GeV. However, quantitative agreement was not achieved;we assume that due to the fact that we have examined the simplest diagrams of theory. 展开更多
关键词 inelastic scattering Cross-Section Total scattering Cross-Section Laplace Method VIRTUALITY Multi-Peripheral Model Regge Theory
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Electron inelastic mean free paths in solids:A theoretical approach
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作者 Siddharth H.Pandya B.G.Vaishnav K.N.Joshipura 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第9期208-214,共7页
In the present paper, the inelastic mean free path (IMFP) of incident electrons is calculated as a function of energy for silicon (Si), oxides of silicon (SiO2), SiO, and A1203 in bulk form by employing atomic/m... In the present paper, the inelastic mean free path (IMFP) of incident electrons is calculated as a function of energy for silicon (Si), oxides of silicon (SiO2), SiO, and A1203 in bulk form by employing atomic/molecular inelastic cross sections derived by using a semi-empirical quantum mechanical method developed earlier. A general agreement of the present results is found with most of the available data. It is of great importance that we have been able to estimate the minimum IMFP, which corresponds to the peak of inelastic interactions of incident electrons in each solid investigated. New results are presented for SiO, for which no comparison is available. The present work is important in view of the lack of experimental data on the IMFP in solids. 展开更多
关键词 electron inelastic mean free path complex potential inelastic electron scattering cross sections SOLIDS
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Hadron formation in semi-inclusive deep inelastic lepton-nucleus scattering
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作者 宋丽华 刘娜 段春贵 《Chinese Physics C》 SCIE CAS CSCD 2013年第10期26-32,共7页
Hadron production in lepton-nucleus deep inelastic scattering is studied in a model including quark energy loss and nuclear absorption. The leading-order computations for hadron multiplicity ratios are presented and c... Hadron production in lepton-nucleus deep inelastic scattering is studied in a model including quark energy loss and nuclear absorption. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES experimental data with the quark hadronization occurring inside the nucleus by means of the hadron formation time. It is shown that with increase of the energy fraction carried by the hadron, the nuclear suppression on hadron multiplicity ratio from nuclear absorption gets bigger. It is found that when hadronization occurs inside the nucleus, the nuclear absorption is the dominant mechanism causing a reduction of the hadron yield. The atomic mass dependence of hadron attenuation for quark hadronization starting inside the nucleus is confirmed theoretically and experimentally to be proportional to A1/3. 展开更多
关键词 deep inelastic scattering NUCLEI nuclear absorption hadron production
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Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering
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作者 宋丽华 刘娜 段春贵 《Chinese Physics C》 SCIE CAS CSCD 2013年第8期29-33,共5页
Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES ... Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440±0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A2/3 power law for quark hadronization occurring outside the nucleus, 展开更多
关键词 atomic mass dependence quark energy loss hadron production deep inelastic scattering
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Motion and acceleration of electrons in high-intensity laser standing waves
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作者 Zhang Qiu-Ju Yu wei +1 位作者 Luan Shi-xia Ma Guang-Jin 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第1期171-176,共6页
The motion and the energy of electrons driven by the ponderomotive force in linearly polarized high-intensity laser standing wave fields are considered. The results show that there exists a threshold laser intensity, ... The motion and the energy of electrons driven by the ponderomotive force in linearly polarized high-intensity laser standing wave fields are considered. The results show that there exists a threshold laser intensity, above which the motion of electrons incident parallel to the electric field of the laser standing waves undergoes a transition from regulation to chaos. We propose that the huge energy exchange between the electrons and the strong laser standing waves is triggered by inelastic scattering, which is related to the chaos patterns. It is shown that an electron's energy gain of tens of MeV can be realized for a laser intensity of 10^20 W/cm^2. 展开更多
关键词 electron motion inelastic scattering laser standing wave energy exchange
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Irradiation Damage of Nano-C2S Particles Studied by In-Situ Transmission Electron Microscopy
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《Journal of Civil Engineering and Architecture》 2012年第4期504-508,共5页
Development of a reactive nanocement is a new approach to improve the physical and chemical properties of construction materials. However, due to the decreased size of cement particles, beam damage during transmission... Development of a reactive nanocement is a new approach to improve the physical and chemical properties of construction materials. However, due to the decreased size of cement particles, beam damage during transmission electron microscope (TEM) observation becomes more severe than in conventional cement. In this work, irradiation damage to nano-C2S (dicalcium silicate) is observed and studied by in-situ evolution of diffraction patterns (DP), high resolution TEM (HRTEM), and electron energy-loss spectroscopy (EELS). The results show that the damage to nano-C2S occurs through a decomposition reaction. Nano-C2S is first amorphized, and then re-crystallized into CaO nano-crystals with average size of 7 nm surrounded by an amorphous matrix of Si and SiO2. During this process, C2S particles exhibit volume shrinkage. The damage energy causing the reaction was analyzed and electron-electron inelastic scattering produced radiolysis and heat, leading to the observed phenomena. 展开更多
关键词 Nanocement TEM damage inelastic scattering decomposition.
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The Limit of Rotational Energy Transfer in Atom-Diatom Collision and the Hard Ellipsoid Potential Model
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作者 Dharmendra Singh Flrozla 《Journal of Chemistry and Chemical Engineering》 2014年第2期180-186,共7页
The limit of rotational energy transfer in atom-diatomic systems due to inelastic collision was investigated over the wide range of collision energy, reduced mass and potential parameters of F2-He system. The IICS (i... The limit of rotational energy transfer in atom-diatomic systems due to inelastic collision was investigated over the wide range of collision energy, reduced mass and potential parameters of F2-He system. The IICS (integral inelastic cross-sections) is obtained by the IOSAM (infinite order sudden approximation method) and predicted by PG (power-gap) law in the variation of cross-sections. The investigation provided that the classical limit of angular momentum transfer is given by hard ellipsoid potential is meaningful even the cross-sections computed on the real potential, provided the classical turning point on the surface of soft potential is assumed as hard potential surface. 展开更多
关键词 Diatomic collision with inert gas atom inelastic scattering rotational energy transfer.
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