The Institute of Physics ( IOP ) по журналам "Chinese Physics Letters"
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(19910401)Based on accurate values of refractive indices, the phase matching angles (m) and effective nonlinear coefficients (deff) for type I and II sum frequency mixing of 1.0795 and 1.3414 m radiations were calculated in KTP ...

(19990601)129Xe magnetic resonance imaging in a magnetic field of 4.7 T and at 311 K with laser polarization in the same field is reported. In order to overcome the selfdiffusion effect that destroys the transverse magnetization ...

(19881101)By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si(, p) 31P reaction were evaluated from the 31P(p, ) 28Si resonance parameters. The reaction rates vary from 1.75×101 to 1.08×104 in ...

(19930601)The variations of the 63Cu NMR spectra of Cu83Zn17 powder mixtures with time of ball milling are shown and analyzed. With increasing the ballmilling time, the phase is developed as terminal phase over 5 h, accompanying ...

(19930701)Applying the method of canonical transformation, we studied the nonlinear wave equation xx  tt = dF()/d. A Bäcklund transformation (BT) of this equation is obtained. Combining BT of this equation with the wellknown BT ...

(19870101)The property of spin wave spectra near the interface of two ferromagnetic insulators is studied. Starting from Heisenberg model and using Bethelattice approximation and Green's function technique, the local density of ...

(19990301)We report the spinpolarized as well as nonspinpolarized band structure calculations of CrO2 based on the local spindensity approximation of the density functional theory. Our result shows that the Fermi level of magnetic ...

(19970101)A bipartition model for ion transport in solids has been presented. Unlike the earlier bipartition model, a singlescattering approximation has been adopted and angular correlation of energy transfer has been partly taken ...

(19980101)It was observed with transmission electron microscopy in the In0.52Al0.48As/InxGa1xAs/ In0.52Al0.48As/InP heterostructure that misfit dislocation lines deviate from the <110> directions at a certain angle depending on the ...

(19890701)Based on Qian's theory, we investigated the reflection and refraction of finite amplitute sound wave on a plane boundary. Under the continuity conditions of the pressure and the normal velocity, some interesting results ...

(20000101)During annealing process of longperiod gratings, the center wavelengths of some modes shift to red wavelength while those of others shift to blue compared with their original written ones, and the magnitudes of the shifts ...

(19950401)The viscosity of the mixture of metal particles Al and silica oil is studied under different ac electric field at room temperature. The viscosity increases with rising field until a maximum (about two times of that at zero ...

(19910201)The nuclear neutrinoless double beta decay with emission of a Majoron is discussed by means of a diagrammatic effective operator approach. In the calculation, the effects of the nuclear short range correlation and nuclear ...

(19960601)We use the general covariant conservation law of energymomentum, which is general covariant and therefore preferable to the noncovariant conservation laws, to analyse the energy of the universe and obtained vanishing ...

(19980601)A new analytic model for the above threshold ionization spectrum of He in a circularly polarized laser field is proposed. The experimental spectrum obtained by Mohideen et al. can be quite well described by this model. The ...

(19940201)A crossedbeam facility for electron impact ionization of ions was constructed. The absolute cross sections for single ionization of Ar+ and Cl+ ions at electron energies ranging from 30 to 500 eV were measured. The ...

(19970801)The possible absolute instability in superlattice miniband transport using the hydrodynamic balance equations for arbitrary energy dispersion is investigated. In contrast to the prediction of the driftdiffusion model that ...

(19890201)We report the first experimental investigation of the photoionization crosssections of singlet excited states 3s5s1S and 3s4d1D in atomic magnesium, which can not be directly reached from the ground state. The measured ...

(19930401)The absolute photoionization cross section for the excited 7p state of K has been measured using the method of ionization saturation. The measured cross sections 7p (321.8 nm) and 7p (643.6 nm) are (0.9±0.6) Mb and (1.9±0.9) ...

(20000501)Absorbing charged rotating (ACR) metric in de Sitter space and related energymomentum tensor are derived. The ACR metric is very simple in advanced time coordinates. The ACR metric involves 8 independent parameters which ...
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