γ-particle
1.This paper presents studies on the changes of particle morphology and size in every step in preparation of γ-Fe_2O_3 and microcrystal in γ-Fe_2O_3 by TEM. The result shows that calcining and reducing arc kcys of scaling dcnsification in the treatment precedure.
2.The method of preparing the Al2O3/PVDF hollow fiber membrane by dry-wet spinning,with adding the inorganic nano-particle γ-A1203 into the casting solution,was introduce in this article.
3.In this process,the particle pattern of blue tungsten oxide(TBO),the phase ingredients of blue tungsten oxide deoxidizated into γ-tungsten oxide(WO?(2?72)),γ-tungsten oxide deoxidizated into WO?2 and WO?2 deoxidizated into W-powder(α-W) are studied .
4.The crystallographic parameters of the prepared LiVPO4F powders are as follows, a=0.514 9 nm, b=0.529 2 nm, c=0.744 5 nm, α=67.397°, β=67.518°, γ=82.008°, and cell volume=0.173 0 nm3. SEM image showed that the particle size was about 2 μm with homogenous distribution.
5.The results indicate that spheri- calγ-Fe_2O_3 nanoparticles with a particle size of about 4～5 nm can be obtained from the two microemulsion solutions,when DBS and CTAB were used as surfactant and the ratios of W/O were 10.77 and 10.56, respectively.
6.By analysing the cosmic ray data of μ-counter array in BES, we obtained informations on the threshold for identifying signal and noise, the detection efficiency of single wire layer, the particle detection efficiency, and the location resolutions in z direction and in r-φ plane for μ-counter array.
7.In this paper, based on the opinion that the γ-matrices in Dirac equation have structure and are decomposable, we decompose the γ-matrices into the direct product of the operators in the spin space and the particle-antiparticle space. By using this method, we attain a complete set of commutative operators, a set of quantum numbers and the correspondingly eigen solutions of the Hamiltonian for a charged Dirac particle moving in a uniform constant magnetic field.
