[en] Using velocity-modulation laser spectroscopy of molecular ions, the rotational spectral intensity distribution and the line width in the (2,3) band of CO⁺ comet-tail system (A²Π-X²Σ⁺) were measured. Not only the rotational temperature of CO⁺ molecular ion, but also other plasma parameters, e.g., the drift velocity and mobility of ion, the electric field strength and thermal temperature in the positive column, have been obtained. Moreover, the modulation index of velocity-modulation spectroscopy was determined to be 0.372 +- 0.119 in authors' experimental system

[en] Using a ray-tracing code, the imaging process of non-point light sources through a concave grating has been studied. It is demonstrated that under specially designed conditions, a plane spectrum can be formed for non-point light sources. The positions for the plane spectrum have been derived for the sources at different distance from the grating. A criterion has been defined under which the effects of variation of the source-size on the focal plane can be neglected

[en] The experimental investigation on the X-ray radiation transport is made. The method for studying X-ray transport is analyzed. Two kinds of targets which are source and cylinder targets are investigated separately. From the source target, the initial condition for transport is obtained. From transport target, the transport result is obtained. The experimental results for the two kinds of targets measured by a soft X-ray spectrometer, flat response X-ray diffraction and transmission gratings are given and analyzed using the simple X-ray radiation transport model. Plasma expansion in cylinder targets are investigated

[en] To explore more simple and efficient ion extraction methods used in atomic vapor laser isotope separation (AVLIS), two-dimensional (2D) PIC-MCC simulation code is used to simulate and compare several methods: parallel electrode method, II type electrode method, improved M type electrode method, and radio frequency (RF) resonance method. The simulations show that, the RF resonance method without magnetic field is the best among others, then the improved M type electrode method. The result of simulation of II type electrode method is quite different from that calculated by 2D electron equilibrium model. The RF resonance method with or without magnetic field has guide different results. Strong resonance occurs in the simulation without magnetic field, whereas no significant resonance occurs under weak magnetic field. And that is quite different from the strong resonance phenomena occurring in the 1D PIC simulation with weak magnetic field. As for practical applications, the RF resonance method without magnetic field has pros and cons, compared with the M type electrode method

[en] Light charged particles emitted from the reactions of 35 MeV/u ⁴⁰Ar + ¹⁹⁷Au are measured experimentally. A new observable, R = d/(d + t + ³He + ⁴He), which is defined as the reduced yield of deuterons, has a monotone relation with the entropy and it is independent of the breakup density (ρ/ρ₀) and N/Z of the system. The entropy values are extracted by using several methods which use the d/p ratios, d_like/p_like ratios, reduced yield of isotope deuterons R and the reduced multiplicity of charged particles M_red, respectively. The entropy values from the reduced yield of isotope deuterons R and the reduced multiplicity of charged particles M_red are nearly the same. These methods can be used in low beam energy heavy ion reactions. The charged particles emitted in rear angles are mainly from an equilibrium-state source with temperature about 4.7 +- 1.2 MeV, which are extracted from the double isotope yields ratios, and entropy S/A = 2.5 +- 0.5. This implies that the Break-up density is slightly less than 0.1 (ρ/ρ₀)

[en] A new kind of double-disk gold targets were irradiated by 0.35 μm intense laser and the properties of improved X-ray spectra were investigated at 'Xingguang' laser facilities. Collision velocities between the primary and secondary disks' plasmas have been measured. This double-disk target's design has avoided the influence of the spraying plasma from primary disk to a certain extent, and increased the 'clearance' for ablated secondary disk. Two soft X-ray spectrometers were used to measure X-ray radiation from the primary and secondary disks, respectively. An X-ray streaked camera was used to obtain time-spatial images emitted from laser-plasma of double-disks targets. Experimental results were analyzed physically

[en] The author has studied plasma transport in scrape-off layer (SOL), by using 'two-point' mode and particles continuity equation. The authors have calculated plasma density distribution, temperature distribution, impurity radiation power loss in SOL with friction

[en] SOI-SIMNI (Silicon On Insulator-Separation by Implanted Nitrogen) films were formed by standard and multiple step implantation methods. The Hall-effects measurements (4-300 K) show that the multiple-step implanted SIMNI films have a lower sheet resistance and higher carrier mobility than those in standard SIMNI films. The DLTS results indicated that there is a deep level defects E_t = 0.152 eV in the standard SIMNI films, and no deep level defects in the multiple-step implanted SIMNI films, which have good electrical properties

[en] The authors have calculated the potential function, electron momentum distributions and charge stripping cross sections for ₃₆Kr^q+ collision with H and He using binary encounter approximation and Thomas-Fermi approximation methods

[en] The shock-compression properties of liquid deuterium and hydrogen are studied by means of the variational fluid perturbation theory. The present theoretical results are in excellent agreement with RRY theory and Nellis' experimental data. The present calculation for the shock temperatures are higher than Holmes' experimental data, the reason for the apparent agreement of the pressures and for the higher shock temperatures are explained