Employing both the Dirac R-matrix and the relativistic distorted wave with independent process and isolated resonance approaches, we report resonance enhanced electron impact excitation data(specifically, effective co...Employing both the Dirac R-matrix and the relativistic distorted wave with independent process and isolated resonance approaches, we report resonance enhanced electron impact excitation data(specifically, effective collision strengths)among the lowest 41 levels from the n = 3 configurations of Cu XV. The results show that the latter approach can obtain resonance contributions reasonably well for most excitations of Cu XV, though a comparison between the two approaches shows that the close-coupling effects are truly significant for rather weak excitations, especially for two-electron excitations from the 3s3p4 to 3s23p23d configuration. Resonance contributions are significant(more than two orders of magnitude) for many excitations and dramatically influence the line intensity ratios associated with density diagnostics.展开更多
The R matrix method is used to compute accurately the collision strengths and the ratecoefficients of low-energy electron impact excitation between target states 2s2 1Se,2s2peP0,1P0 and 2p23pe,1De,1Se of N IV,and comp...The R matrix method is used to compute accurately the collision strengths and the ratecoefficients of low-energy electron impact excitation between target states 2s2 1Se,2s2peP0,1P0 and 2p23pe,1De,1Se of N IV,and comparisons of our results with those of other theories and experiments are made.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11076009 and 11374062)the Chinese Association of Atomic and Molecular Data,the Chinese National Fusion Project for ITER(Grant No.2015GB117000)the Leading Academic Discipline Project of Shanghai,China(Grant No.B107)
文摘Employing both the Dirac R-matrix and the relativistic distorted wave with independent process and isolated resonance approaches, we report resonance enhanced electron impact excitation data(specifically, effective collision strengths)among the lowest 41 levels from the n = 3 configurations of Cu XV. The results show that the latter approach can obtain resonance contributions reasonably well for most excitations of Cu XV, though a comparison between the two approaches shows that the close-coupling effects are truly significant for rather weak excitations, especially for two-electron excitations from the 3s3p4 to 3s23p23d configuration. Resonance contributions are significant(more than two orders of magnitude) for many excitations and dramatically influence the line intensity ratios associated with density diagnostics.
基金Project supported by the National Natural Science Foundation of Chinathe Foundation for Doctor Bases of National Education Committee in China+1 种基金the Foundation of AtomicMolecular Data Research Association of China
文摘The R matrix method is used to compute accurately the collision strengths and the ratecoefficients of low-energy electron impact excitation between target states 2s2 1Se,2s2peP0,1P0 and 2p23pe,1De,1Se of N IV,and comparisons of our results with those of other theories and experiments are made.
