We prove that Gibbons-Maeda reduction of two-component cosmology to the Toda lattice can not be generalyzed for n-component case.

A renormalizable and unitary massive abelian gauge field theory is proposed. It suggests a possible existence of the interaction between baryons and currents.

The assumption of indistinguishability of quarks in the region of overlapping of nucleon wave functions leads to enlargement of confining region of those quarks. The model is formulated in terms of wave functions of nucleons and quarks. An application to charge form factor of ³He is given.

A method to determine the value of the ratio of charmed baryon to meson in e⁺e^- annihilation is investigated. Using the data of CLEO, HRS and MARK II groups, we obtain f ≡ B_c /M_c = 0.21 ± 0.05, 0.24 ± 0.08 and 0.33± 0.05, for √s = 5.2, 10.55 and 29GeV, respectively.

The black-body radiation model used in the present work is a statistical model of e⁺e^- jets for hadron multiplicity particle creation. It shows that in terms of Bose-Einstein statistics, kT₀ ∝ s ^1/4. The average number, < n_ch >_Q, of the charged hadrons is given by statistical theory and SU(3) group calculation.

Method of finite temperature real time Green's function with normal pair cutoff (NPC) approximation is applied to study liquid-gas phase transition in finite nuclear matter with the Gogny D1 effective interaction. It is found that the critical temperature decreases as the size of nuclear matter reduces or the asymmetric parameter increases.

To perform theoretical calculations of electronic structures of high Z atomic ions, one has to consider the configuration mixings due to excitations and rearrangements of the core and valence electron orbitals with the same principal quantum number. We present a method to examine systematically such configuration mixings along isoelectronic sequences. As an illustrative example, such configuration mixings give rise to a reversed fine-structure splitting of 4²F_5/2,7/2 states for atomic ions with Z≈ 36 along the potassium isoelectronic sequence; while the 5F, 6F, and 7F have normal fine-structure splittings.

The ultraviolet photoelectron spectroscopy (UPS) spectra of Pd/D system (including absorption at high pressure) with various D contents were measured. The D absorption induced a new peak centered at about 6eV below E_f, which seems to derive from the hybridized states of deuterium and Pd electronic states. Its intensity increases with D content; only part of the D atoms in the Pd lattice are ionized at high D content.

Deep donor levels in Te-doped GaAs_1-xP_x for a large range of compositions have been studied by deep level transient spectroscopy (DLTS). Three kinds of deep levels A, B, and C were observed. Only level A appears in all the samples; it is considered that level A is originated from DX centers. No any regularity of presentation for levels B and C was able to find. Their properties are probably more complicated.

The Pb-doped Bi-based amorphous solid has been prepared by the anvil quenching method from the melt. After annealing, we obtained the dense superconductor with onset and zero resistance temperature at 120K and 107K, respectively. X-ray powder diffraction ( XRD ) and selected area electron diffract ion ( SAED ) analysis show that there is mainly high T_c phase (2223 phase) in the sample, and scanning electron microscopy ( SEM ) observation of the surface of the sample reveals that the needle-like grain abound in sample. Energy dispersive analysis of X-ray ( EDAX ) indicates that the average composition of grains is Bi₂Pb_0.3Sr_1.3Ca_1.7 Cu_2.3 O_δ

The A1 substitution in the T1-Ba-Ca-Cu-O superconducting system was studied. Up to 70% of Tl can be substituted by Al, without significant reduction of T_c. X-ray diffraction indicates partial A1 substitution does not alter the crystal structure of the 2223 phase. Excessive A1 formed Al-Cu alloy and unidentified phases, which gradually destroyed the superconductivity.

The modified dynamic TCIS (Transport and atomic Collision cascade of energetic Ions an Solids) Monte Carlo program including the radiation-enhanced Gibbsian segregation (REGS) is employed to estimate the compositional distributions at surface of the Au_0.56Cu_0.44 alloy under 2keV Ar⁺ ion bombardment at high dose. The calculation results exhibit that the Au composition enriches in the first layer (74 at.%), depletes in the second layer (37 at.%) and gradually rises with depth to the bulk composition. The effect of the relation between sputter depth and segregation layer on the surface concentration of Au_0.56Cu_0.44 is also discussed.