[en] The SVRT model is applied to study the reaction of H + CD₄→HD + CD₃ using TDWP method. In the study, reaction probability, total cross section and rate constant are calculated from the ground state of the reagent. The effect of substituting D for H has been studied for the reaction. (authors)

[en] The interaction between multimode laser fields and isotopic atoms is investigated. By an approximation to a multimode laser field with stochastic model of chaotic field and by using the Fokker-Planck equation technique, the authors have derived the dynamical equations describing the interaction between the finite-bandwidth chaotic fields and isotopic atoms. We have studied the influence of laser linewidth on ionized efficiency and selectivity of isotopic atoms

[en] A new method to calculate K-shell electron capture cross sections of multicharged ion collisions with atoms is developed, which is called the model potential Oppenheimer-Brinkman-Kramers approximation (MPOBK). In this method, the correlation effect between the active and the passive electrons and the screening effect in the wave function of the active electron are considered. An analytical expression for total cross section of projectile from the K-shell is obtained. The present results for He⁺, He²⁺, Li³⁺-Ne, H⁺, He²⁺-C and C^5+,6+-Ar collisions agree well the existing observed data

[en] The excited spectra after interaction of C⁺ ion with a carbon foil 8.5 μg/cm² thick have been investigated by using the Beam Foil technique at an incident energy of 110 keV. The measured lines in the spectra are mainly from excited ions of CI, CII and CIII. The lifetimes of stronger lines are also measured

[en] HIRFL-CSR is a proposed electron cooling storage ring optimized to accelerate and store beams of highly charged heavy ions. Several possibilities for advanced atomic physics studies are discussed, such as studies of electron-ion, ion-atoms, photon-ion-electron interactions and high resolution spectroscopy

[en] Based on the relativistic multiconfiguration theory, the fine-structure energy levels and transition parameters of highly stripped ion Bi⁵⁴⁺ have been calculated using the General-purpose Relativistic Atomic Structure Program (GRASP2, 1992). The wavelengths obtained are in good agreement with the experimental data available, which shows that there exist more QED correction in this highly stripped ion

[en] Formation mechanism of the ion micro-cluster ⁴HeH⁺ in RF ion source are reported

[en] The electron capture sections for H⁺-He collision has been calculated using 'Boundary-corrected First Born' (BIB) approximation. The results are in good agreement with experimental data in 100 keV-2400 keV energy region

[en] The internal target system is an important inset device in HIRFL-CSR, also is the first one installed at the heavy-ion cooler-storage ring. The internal target has many unique advantages such as high luminosity, high precision and high sensitivity, which make the internal target an important tool of high-precision experiments. The internal target is located at one straight section of CSRe which is designed to operate both in the unpolarized mode and in the polarized mode. The unpolarized target is a cluster target and may provide the gas target of H₂, N₂, inert gases and small molecular gases with the expected density of ≥10¹² atoms/cm². The cluster target obtains the cluster beam by cooling supersonic gas-jet. The first test experiment has been done after the installation and collimation of cluster internal target. The experiments include the test of vacuum system and stability of cluster target system, cooling of nozzle. The principle of cluster target is introduced and the results of first test experiment are reported here. (authors)

[en] The collisional-radiative model from the FAC (flexible atomic code) is used to simulate Mg plasma consisting of Mg¹⁰⁺, Mg⁹⁺ and Mg⁸⁺, which is a general application to the calculation of Mg spectrum of collisionally ionized plasma, it includes the recombination and ionization process in the line formation. An X-ray spectra from the Li-like Mg plasmas is obtained, which shows the relations between X-ray wavelengths, relatively radiative intensity and the electronic temperature, which are important to plasmas diagnostics. (authors)