Using a modified R-matrix code, the fine-structure-resolved partial photoionization cross sections of excited Na （Z = 11） are calculated within the Breit-Pauli approximation. Our calculated energy levels of Na＋ and...Using a modified R-matrix code, the fine-structure-resolved partial photoionization cross sections of excited Na （Z = 11） are calculated within the Breit-Pauli approximation. Our calculated energy levels of Na＋ and Na are in good agreement with the experimental values within 1% and the branching ratios of the J-resolved partial cross sections are consistent with the recent measurements within the experimental uncertainties. The agreements are impossible to be obtained without adequately taking into account the relativistic effects and the electron correlations together. Therefore, even for the intermediate-Z elements （e.g. Na with Z = 11）, the relativistic effects （mainly the spin-orbit interactions） should not be neglected.展开更多
The photoionization cross sections of the levels belonging to the ground configuration [Ne]3s^2 3p^6 3d of Ge^13＋ are investigated using the fully relativistic R-matrix method in the 2p - 3d excitation region. The ph...The photoionization cross sections of the levels belonging to the ground configuration [Ne]3s^2 3p^6 3d of Ge^13＋ are investigated using the fully relativistic R-matrix method in the 2p - 3d excitation region. The photoionization cross section is dominated by 2p - 3d resonances. The detailed resonance structures are described and analysed with the resonance positions, widths and oscillator strengths to be determined. Good agreement is obtained between the length and velocity forms of the resonance oscillator strengths. The relative difference is less than 8%.展开更多
基金Supported by This work is supported by the Ministry of Science and Technology and Ministry of Education of China, the Key Project of the Ministry of Education of China （N0 306020）, the National Natural Science Foundation of China, the National High- Tech ICF Committee in China and the Yin-He Super-computer Center, Institute of Applied Physics and Mathematics, Beijing, China, and the National Basic Research Programme of China under Grant No 2006CB921408.
文摘Using a modified R-matrix code, the fine-structure-resolved partial photoionization cross sections of excited Na （Z = 11） are calculated within the Breit-Pauli approximation. Our calculated energy levels of Na＋ and Na are in good agreement with the experimental values within 1% and the branching ratios of the J-resolved partial cross sections are consistent with the recent measurements within the experimental uncertainties. The agreements are impossible to be obtained without adequately taking into account the relativistic effects and the electron correlations together. Therefore, even for the intermediate-Z elements （e.g. Na with Z = 11）, the relativistic effects （mainly the spin-orbit interactions） should not be neglected.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10433010, 10373014 and 10403007, and Beljing Key Laboratory for Nano-Photonics and Nano-Structures.
文摘The photoionization cross sections of the levels belonging to the ground configuration [Ne]3s^2 3p^6 3d of Ge^13＋ are investigated using the fully relativistic R-matrix method in the 2p - 3d excitation region. The photoionization cross section is dominated by 2p - 3d resonances. The detailed resonance structures are described and analysed with the resonance positions, widths and oscillator strengths to be determined. Good agreement is obtained between the length and velocity forms of the resonance oscillator strengths. The relative difference is less than 8%.
