Atomic Structure Of Warm And Dense Hydrogen-like Plasma And Its Collision With Low-energy Electrons

The influence of atomic processes in plasma has become one of the hottest topics of current researches because of the intensive research on inertial confinement fusion,dust plasma,artificial plasma and astrophysics.Screening Coulomb interactions in the plasma environment lead to a very different atomic structure and collision dynamics of particles in the plasma are very different from those in the isolated environment.Currently,the screening potential is mainly used to approximate the interaction of charged particles in a plasma.Due to the complexity of many-body correlations in plasmas in spanning a giant range of temperature and density of particles,theoretical models and screening potentials are used to describe the screening Coulomb interactions and mostly limited to specific regions.For example,the Debye-Hiickel（DH）screening potential is generally used to describe the charged-particle interactions for weakly coupled classical plasmas,while the cosine-Debye-Hückel（CDH）screening potential is used for quantum plasmas.However,for warm dense plasmas the performance of most model potentials is not good.Recently,Stanton and Murillo derived a new screening potential（EC potential）based on the theory of orbital-free density generalization taking into account the gradient correction of kinetic energy at finite temperature and the exchange-correlation effect.The EC potential has a wide range of applicability and is theoretically applicable to most of plasmas.In this paper,we focus on the theoretical study of warm and dense hydrogen-like plasma using the EC potential.The warm dense plasma environment effect makes the atomic structure and kinetic processes of the particles exhibit significant differences from those in the isolated environment.We reported the energy levels,oscillator strengths and radiative transition probabilities of warm dense hydrogen-like plasma and investigate the effect of gradient correction of kinetic energy by finite temperature and the effect of exchange correlation on them.By analyzing the calculated results,the bound states of hydrogen-like ions under the same shell layer in the plasma environment no longer have angular momentum degeneracy and the number of bound states will become finite.As the plasma temperature decreases and the density increases,the finite number of bound states decreases and the energy level of the bound states rises;and when the plasma temperature and density the reach certain specific values,the bound states will successively enter into the continuum.For the classical weakly coupled plasma environment finite temperature gradient corrections and exchange correlations have negligible effects on energy levels,oscillator strengths and radiative transitions probabilities.In contrast,as the plasma temperature decreases and the density increases in a warm dense plasma,the effect of gradient correction of kinetic energy by finite temperature and the effect of exchange correlation.In addition,the exchange correlation in warm dense plasma has much larger effect on the atomic structure than finite temperature gradient correction.In addition,we have studied the elastic and inelastic scattering near the n=2 threshold of different hydrogen-like plasmas and low energy electrons.It is found that as the plasma temperature decreases and the density increases,it exhibits different kinetic properties for different warm dense plasma with the same intensity of screening effect.This thesis focuses on the effects of warm dense plasma shielding effects on the atomic structure of hydrogen-like ions and their collisions with low-energy electrons.This is a very important reference for the study of fast ignition experiments,giant planets,and other laboratory experiments.