The abnormal saturation absorption signal of sodium atom D1 line has been observed in different experimental conditions. The explanation has been presented quantitatively using the velocity-selective optical pumping model.

The energy-pooling collision cross section for the transfer from 3s3p¹P to 3s4s³S of Mg has been determined by measuring the relative intensity of the fluorescence at 5184 Å and 2852 Å. The average cross section is (3.1±40%) x10^-15cm². By considering the influence of radiation trapping and other uncertain effects, the absolute uncertainty of our measurement is within one order of magnitude.

The bulk interaction between two phases in AgI(η-Al₂O₃ or α-Fe₂O₃) has been investigated by means of electrical conductivity, DTA and Mössbauer spectra. It shows that both α→β phase transition of AgI and Morin transition of α-Fe₂O₃ influence each other.

It is proved in this paper that under proper coordinates the Gonzalez-Diaz metric together with the Schwarzschild metric constructs the globally singularity-free metric of Schwarzschild black hole which possesses horizon, but has no singularity. In this case the dominant energy condition is satisfied, and the results be regarded reasonable in physics.

We here present our theoretical study on the average ground electronic configurations of atomic ions with the 4f electrons. There occur in-teresting configuration competitions which will have some effects on the isoelectronic scaling relations.

A new experimental phenomenon - resonance dip(weakening) of multiphoton ionization in Mg vapor with 3s,3p ¹P as an intermediate state has been observed. Photoionization and coherent radiation at 5183.7 Å, accompanied by ionization dip when Mg vapor pressure was high enough, were studied simultaneously as functions of vapor pressure, laser power density and buffer gas pressure. Possible contributions to ionization dip and coherent radiation are discussed.

Based on the Arndt's phase shifts and conventional meson exchange theory, the existence of ¹D₂ (2.14GeV) dibaryon resonance is discussed.

The IR difference spectra of a-Si:H films prepared by H-doping evaporation ( H. D. E. ) method were compared with those by glow discharge (G.D.) method. It has been found that the bonding H content of E.D.E. sample is comparable to that of G.D. sample. The behaviour of absorption bonds of dehydrogenated samples seems to show that the Si-H bonds in H.D.E. sample are more stable than those in G.D. sample.

Equations of acoustic vibration of a finite lattice in two dimensions are solved taking into account the three-body interactions in nearest-neighbour approximation. The results obtained are compared with the orthogonal finite crystals.

Laser emission of F⁺₃ color centers in LiF crystal at room temperature (RT) is reported here for the first time.

We search the supersymmetric invariant action with tachyonic neutrino. We explore the possibility that the sneutrino is the lightest supersymmetry partner, to obtain m²_v = g m²_s - | m²_v|. This assumption implies m_v 2GeV from cosmological restriction.

The stochastic quantization approach is generalized to the case of fermions on lattice. The approximate approaches for solving Langevin equation are analysed.

Using an intense visible laser pulse to excite the liquid-filled waveguide with a long gain length, we have observed a new stimulated-scattering with super-broadened spectral width (500cm^-1) in addition to the sharp lines of SRS of the benzene or carbon-disulfide which is used as a filling liquid.