Theoretical Analysis Of Beam-foil Spectra Of Highly Ionized Sulfur Ions

The research of highly charged ions plays a key role in the study and test on the atomic structure,nuclear structure and basic particles; as well as the research and diagnosis on kinds of plasmas in astrophysics and fusion. And its radiation spectra not only contain important information about plasma parameters such as charge state distribution, polarization of X?ray radiation and so on, but also provide an important diagnostic tool for investigations of laboratory and astrophysical plasmas. beam?foil technology is an important method of producing the highly charged ions in the laboratory, and is characterized by higher excitated degree and shorter excitated time. Therefore, it is widely used to research on different charged ions for every element.Many researches show that the spectra from different charged S ions are in the spectra of planets, it is very important for the study of the spectra from celestial body to identify the spectra of Sulfur ion. Consequently, on the basis of analyzing the beam-foil spectra of sulfur, we use the quasi?relativistic Hartree?Fock (HFR) method in the present work, and give the systemic theoretical investigation on the levels, electric dipole radiation (E1) wavelength and its transition oscillator strength for S8+-S13+ions. Besides, the correlative atomic data for S10+ are calculated in detail.In this thesis, firstly, an introduction has been given, which involve the background and the research methods for highly charged ions in experiment and theory; Chapter 2 describes the quasi?relativistic Hartree?Fock (HFR) method, the calculation of transition probability and oscillator strength and the relative knowledge of Gaussian broadening; the experimental principle of beam?foil technology and its experimental apparatus, as well as the identity of the beam?foil spectra technology are presented in Chapter 3; Chapter 4 includes the work done during the master period, on the basis of seeing about the recent study on the sulfur element in the experiment and theory, applying the Cowan's code based on the quasi?relativistic Hartree?Fock method, we calculate the levels, electric dipole radiation (E1) wavelength from 150? to 500? and their transition oscillator strength and so on, and consequently identify the experimental spectra. Besides, the large number of atomic data such as levels etc for principle quantum number n=2 and 3 for S10+ ions using two configuration models are calculated , and the effect caused different configuration on the atomic data are analyzed; In the end of the thesis, some summarization and a vista of the future work have been given.