The Institute of Physics ( IOP ) по журналам "Chinese Physics Letters"
Отображаемые элементы 120 из 2263

(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 ...

(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 ...

(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 ...

(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 ...

(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) ...

(19850701)The vacuum ultraviolet absorption and emission spectra of raregas van der Waals molecules were observed. A large broadening of at least 240 of Xe first resonance absorption line was obtained at cell pressure 4 atm. Strong ...

(19930501)Explicit computation for the KaupKupershmidt (KK) equation shows that there exists an abundant symmetry structure of the KK hierarchy. The recursion operator, inverse recursion operator and the symmetries all can be ...

(19991201)Using dynamics equation, acceleration of outflowing ion during dipolarization in a substorm in the magnetotail is simulated. The main results show that: (1) The ion distribution function that is initially exponentially ...

(19860601)We present an SUSY GUT model, in which the strong CP violation can be eliminated via the invisible axion mechanism. We show that any b1, 1=0 model cannot use the entropy production mechanism, however, A2, A3, A4, A5, B2, ...

(19970101)Measuring the single spin asymmetry for the inclusive almost backtoback twopion production by electronpositron annihilation to access the corresponding finalstate interactions is suggested. Such an experiment will be ...
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