Helium Magnesium Ions, The Beryllium-like Ion Energy Level Structure And Spectral Transitions Theoretical Research | Posted on:2002-12-09 | Degree:Master | Type:Thesis | Country:China | Candidate:T L Yang | Full Text:PDF | GTID:2190360032457336 | Subject:Atomic and molecular physics | Abstract/Summary: | PDF Full Text Request | In this paper, the forbidden transition data of excited states for Like-Be ions (Z=5-92), the energy structure of Like-He Mg10"1", AL11+and the ionization energy of metal Magnesium have been calculated systematically by the fully relativistic multiconfiguration Dirac-Fock method. This consist of six chapters, which in chapter 1 we have introduced simply the progress of and main theoretical method of highly ionized ions in theoretical and experimental, in chapter 2-3,the fundamental theoretical method are generalized, in chapter 4, We study systematically the energy structure for Mg10+and AL11+, the spectra transition data of electric dipole about the two -ions and ionization energy of metal Magnesium, the energy intervals, Einstein coefficients and weighted oscillator strengths of magnetic dipole (Mi) (Is22pld\-(ls22p3d)0, (\s22p4d\-(\s22p3d)0 have been systematically studied in chapter 5.In addition,We have analyzed the feasibility of producing X-ray laser between (Is22p3d)i and (1s22p3d)0 .between (Is22p4d\ and (Is22p3rf)0 .The last one have drawed conclusion about the above works.The highly ionized atoms spectroscopy are the basis of studying atomic structure, physic procedure of high temperature plasma and plasma diagnosis technology . These are on the theoretical front and the data are the inevitable basis data in ICF and MCF.The spectra data about low Z and middle Z ions are complete, but those of highly Z elements and heavy ions are rare. Based on multiconfiguration Dirac-Fock approach with breit and QED correction the energy separation and spectra data such as spontaneous transition probability and weightedIVoscillator strength of magnetic dipole for isoelectronic sequence Be. The results indicated that (1) relativistic effect, breit and QED correction have made partial energy order changed. These can not be ignored in treating highly stripped ions. (2) Because the electronic correction has effected on the calculation results, the data about ionization energy of Mg including the electronic correction are more agreement with the experimental result. (3) The transition data of EI for Like-He Mg10+ indicated that the spectra lines are intensive. To a certain , as the qutatum number increse the transition probability and oscillator strength decrease. In addition, it is possible for transition that satisfies the JJ rule but LS rule. (4) We first obtain the spectra transition data of magnetic dipole (Mi) (ls22/>3), - (Is22p3d)0 , (Is22p4d\ -(\s22p3d)0foT Like -Be ions. The energy intervals increase with atomic nuclei number and the increasing rate of energy intervals for MI is quicker than that of energy intervals for EI .For transition probabilities, though that of low Z is small, for heavy ions it has reach 107 quantity which nutral atomic probability is so in generalist increasing regular is the same as that of energy intervals. (5) We have analyzed the feasibility of producing X-ray laser lines between the above levels.The results indicate that it is difficult to obtain the popular reverse and X-ray laser lines because the rate of direct combination is 10 times larger than that of dielectric combination and the reverse can not be obtained by the direct combination without taking external stimuli factors into account. But the new idea which X-ray laser line of for-bidden transition should be produced in a suitable pump mechanism has point out a new development direction for finding the best pump directcombination and new laser media. | Keywords/Search Tags: | Highly ionized state, Like-He ions, Like-Be ions, Electronic dipole (E1), Magnetic dipole (M1), spontaneous transition coefficient, Energy intervals, Weighted oscillator strength | PDF Full Text Request | Related items |
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