A device and method for measuring the P-V relation of certain substances under hydrostatic pressure up to 30,000 kg/cm2 are described in detail.The pressure in the vessel was calibrated by the pressure transition phenomena of KBr, KC1 and Bi at 20℃. The result shows that the pressure in the vessel varies linearly with the applied force. Corrections were made for the deformation of the piston and t...
The chemical etching method has been used to investigate the dislocation "rosette" of silicon single crystal specimens under indentation at temperatures 800-1000℃. Experimental results show that all the dislocations introduced in silicon due to indentation distribute in the {111} slip planes; the dislocation lines are mostly oriented along the and directions. Analysis indicates that dislocation ...
The phase diagram of the copper-rich alloys of the ternary system of Aluminium-cadmium-copper, containing up to 30 wt % Al and up to 30 wt % Cd, has been studied by X-ray diffraction methods. The solid phase section at room temperature was found to consist of five single-phase [i.e.α,γ2,δ,ζ2,and η2] regions, ten two-phese [i.e.α+β,α+γ2,β+γ2,γ2+δ,β+δ,δ+ζ2,ζ2+η2,δ+η2,β+η2,and η2+θ] regions, and four...
The direct process of spin-lattice relaxation in the ground state of ruby of low concentration is calculated at low temperature. The nonradiative transition probabilities within the four ground sub-levels are calculated by aid of second-order wave functions obtained in the strong-field coupling scheme. Under the measured condition of impulse saturation at θ=90°, the spin-lattice relaxation time at...
The present paper gives the results of an analysts of the transient process of discharge by the Laplace transformation method. Observations of the discharge voltage and current were made with an oscillograph. From our study, a general knowledge of the characteristic of such a discharge circuit and the influence of the parameters on line intensities were obtained.
Taking account of the mixing of states within the subshells 2s1/2 and ld3/2, we have systematically calculated the spectra of nuclei with A=30, 31, 32 and A=37, 38, according to Talmi's method. The calculated results are in good agreement with the expenmental data.
In this paper, we have investigated the influence upon the modification of the theory of equivalent spectrum of photons by Weizs?cker-Williams, given by the electromagnetic structure of the nucleon. To overcome the difficulty caused by the divergence in the calculation with the form factor of the Clementel-Villi's type, we have suggested also a way of modifying the form factor.The results of the c...
This short paper gives two remarks on the singularities of the scattering amplitudes in a perturbation theory. First, it is pointed out that if the condition of stability is violated at several corners of a Feynmann diagram so that analytic extensions with respect to several external masses must be made, different sequences of carrying out the analytic extensions may lead to different positions of...
For the nonlocal potentials U(r,r′,R)=e-μr/r·e-μr′/r′·e-αR/R and U(r,r′,R)=e-μr/r·e-μr′/r′·e(-(β(r+r′))1/2·R))/R it is proved that the S matric element S(λ, k) is meromorphic in the topological product of the half λ -plane Reλ>-1/2 and the whole k plane cut along (-i∞, 0) and (iμ,+i∞) and that for large |λ|,S(λ, k)-1=O{1/λ3/2 exp[-λch-1(1+μ2/(2k2))]} for k > 0 and |argλ|≤π/2.