Based On The Number Of Atomic Processes Of The Shanghai Ebit Device Experiments And Theoretical Research

Highly charged ion (HCI) plays a key roe in studies of atomic structure, many body interaction, relativistic effect and quantum electrodynamics, and also in diagnostics of high temperature plasmas.Electron beam ion trap (EBIT) is a device used both as an HCI source and as an HCI light source, which provides opportunities for various kinds of physics research related on HCIs. The present experimental and theoretical studies of atomic processes based on Shanghai-EBIT contains four researches:â… . The KLL dielectronic recombination resonant strengths of He-like up to O-like xenon were experiment studied at Shanghai-EBIT, using a fast electron beam energy scanning scheme. The average experiment uncertainties were about 9%. We also made fully relativistic configuration interaction calculations and compared with the experiment results.â…¡. The two-electron contribution to the ground state binding energy of He-like Ar¹⁶⁺ ions was measured to be 301.7±2.9 at Shanghai-EBIT, employing a thin molybdenum foil K-edge absorption method. Experiment method to study the two-electron energy at Shanghai-EBIT was established. We also discussed the importance of the absorption experiment to EBIT parameter diagnostics.â…¢. Measuring the natural line width of the transition (2p_3/2⁵3d_5/2)₁-2p⁶ in Ne-like Ba⁴⁶⁺ at Shanghai-EBIT, we determined that the lifetime of the excited state (2p_3/2⁵3d_5/2)₁ in Ne-like Ba⁴⁶⁺ wasÏ„=1.01±0.25 fs. The research explored experiment measurement of femtosecond lifetime in HCIs at Shanghai-EBIT.â…£. The effects of hyperfine induced transition on the decay of the first excited states in Ni-like ions were studied, using a multiconfiguration Dirac-Fock method. In the presence of a non-zero nuclear spin, the hyperfine induced transition reduced the lifetime of the first excited states in Ni-like ions. Experiment carried out by Lowrence Livermore National Laboratory EBIT group demonstrated our prediction .