New Exact Solutions of the CDGSK Equation Related to a Non-local Symmetry

A non-local symmetry of the Caudrey-Dodd-Gibbon-Sawada-Kotera(CDGSK)equation has been used for finding exact solution in two different ways.Firstly,using the standard prolongation approach,we obtain the finite Lie Bäcklund transformation and the single soliton solution.Secondly,combining some local symmetries and the nonlocal symmetry,we get the group invariant solution which is described by the Weierstrass elliptic function and is deduced to the so-called interacting soliton for a special parameter.

Theoretical Studies on Vibrationally Assisted Adsorption of H_(2)on Cu(100)Surface

Trajectory simulations are carried out for vibrationally assisted adsorption of H_(2)on Cu(100)surface.The potential-energy surfaces for H_(2)approaching the copper surface in any molecular orientation are obtained by using the embedded-atom method.It is clearly shown that the vibrational energy of incident H_(2)greatly promotes the dissociation by assisting H_(2)to surmount the activation barrier at the reaction zone.The dependence of initial sticking coefficient S0 for H_(2)activated adsorption on Cu(100)surface on the normal incident translational energy EN has been calculated.The different contributions from H_(2)(v=0)and H_(2)(vn=1)to the sticking probability of H_(2)molecular beam adsorption on Cu(100)are investigated.The results are in well agreement with the experimental observations and other theoretical calculations.

Study of Giant Dipole Resonance of Super Heavy Compound System

A microscopic semi-classical approach,i.e.,the linearized Vlasov equation with a collision term treated by the relaxation time approximation,is simply described and is used to investigate the giant dipole resonance(GDR)from hot super heavy compound system.The possibility of such GDRγrays emission is described also according to the fission delay.For Au+Au system(A=392)and Xe+U system(A=374),the temperature dependence of strength distribution of GDRγrays and the deformation effect on GDRγrays are discussed in framework of this approach.

Isospin Effects of Critical Behavior in Lattice Gas Model

Isospin effects of the critical phenomena were studied via Xe isotopes in the frame of the lattice gas model.All the critical temperatures for four Xe isotopes are close to 5.5 MeV at the same freeze-out density of about 0.39ρ0.The critical values of power law parameter of mass distribution,mean multiplicity of intermediate mass fragments,information entropy and Campi's second moment show minor dependence on the isospin at the critical point.

Far Infrared Resonance Transition Study of the Chain-End S=1/2 Modes in an S=1 Antiferromagnetic Chain

The unpaired spin S=1/2 states which occur at the ends of an S=1 Heisenberg-like antiferromagnetic chain,have been observed recently in low-temperature electron spin-resonance measurements of Ni(C_(2)H_(8)N_(2))_(2)NO_(2)ClO_(4) containing selected impurities.We present here a further study on this topic by far infrared transmission spectra under the magnetic field.The splitting of S=1/2 modes was clearly observed and explained by the interaction of S=1/2 modes at two nearby chains,which can be separated by vacancy-like defect.

Efficient Formation of Large Chain Carbon Clusters

We find that bare C_(n)^(-) clusters favor chain structure from n=4 up to 43 by laser desorption mass spectrometric study of C60 admixed with polystyrene,whereas both one-and two-dimensional structures should coexist in the same mass region in gas,phase generally.The origin of the anomaly was also proposed in the text.