The Effects Of Electron Correlation And The Breit Interaction On The Radiative Transitions Of Double K Hole States Of He-like Ions

The energy structure and radiative decay processes of the inner-shell hole state are one of the important subject of atomic physics.Investigations on it are helpful for explaining the effects of electron correlation,relativity and quantum electro-dynamics(QED)on the energy structure and radiative transition of these exotic atoms.It is also helpful to reveal the situation of the electron coupling in the complex atom system.For the astrophysics and laboratory plasma,some important diagnosis information,such as the composition,temperature,density and the charge state distribution were provided by these basic atomic physics processes.It is also important to obtain the highly accurate atomic data which is crucial to the plasma modeling.The effects of electron correlation effect、Breit interaction and QED effect on the energy structure and radiation transitions from the double K hole states of He-like ions systematically.A reasonable,appropriate electron correlation model will be constructed for describing the complex electron correlation effects in the single and double hole states.Some necessary reference,instruction and analysis for the high precision X-ray spectrum in HIRFL are expected.It is also expected to have more comprehensive understanding on the physical mechanism and interaction of the inner-shell hole state.Some fundamental atomic data with high precision will be provided for the future application.Multi-configuration Dirac-Fock(MCDF)theory and active space method(AS)which implemented by the GRASP2K package are employed to study the structures of the ground state configuration 1s~2,excited configuration 2s2p,1s2s and transition properties of one electron one photon(OEOP)transition and two electron one photon(TEOP)transition among these levels.The main contents of the present thesis are as follows:Based on the Multi-Configuration Dirac-Fock method combined with the active space method,the energy levels and radiative transition were calculated for He-like Ne,Si,Ar,Ca,Fe,Ni,Cu,Zn,Kr,Nb,and Ag ions.A reliable electron correlation model which can be employed to calculate the the structures and transition data of ground state configuration and the excited configuration for He-like ion was constructed.The energy levels、transition data(transition energy,rate)were calculated in the present work.With the increase of the active orbital basis systematically,the calculation results of the energy level tend to be converged.On this basis,the contribution of the electronic correlation effect,the Breit interaction and the QED effect to the transition energy and the rate of transition is systematically studied.The transition energy and rate of the 2s2p-1s2s(OEOP)and2s2p-1s~2(TEOP)transitions agree well with the existing experimental observations and others theoretical calculations,which further indicates that the correlation model is reasonable.Based on the present calculations,the effects of the electronic correlation effect,the Breit interaction and QED effect to the transition energy and the transition rate is analyzed.The current calculation results and analysis indicate that the electron correlation effect and Breit interaction contribution to the transition energies of both OEOP and TEOP transition will decrease with the increase of Z.The competition between the nucleus-electron Coulomb interaction and electron-electron correlation was obviously found for lower Z ions.The nucleus-electron Coulomb interaction will be dominated in high Z ions.The calculated data will contribute to the further experimental and theoretical research on OEOP and TEOP transitions of He-like ions and some fundamental atomic data with high precision will be provided for the astrophysics and laboratory plasma simulation.It is of great scientific significance and potential practical application value.