Rate coefficients for electron impact excitation of helium-like ions within the Dirac R-matrix approach
Rate coefficients for electron impact excitation of helium-like ions within the Dirac R-matrix approach
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狄拉克 R 矩阵方法中类氦离子的电子碰撞激发的速率系数
DOI：
10.1088/0953-4075/33/17/322
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
P. Norrington
中科院分区：
文献类型：
--
作者：
E. Kimura;S. Nakazaki;K. Berrington;P. Norrington
狄拉克R矩阵理论用于使用狄拉克原子R矩阵代码计算类He离子（S14+、Ca 18+和Fe 24+）的电子碰撞激发的碰撞强度，狄拉克原子R矩阵代码主要由Norrington和Grant开发（Norrington PH和Grant I P 1987 J. Phys. B：At.摩尔Phys.204869）。计算中包括最低的31个目标水平。计算了从基态1 s2 1 S 0跃迁到1 s2 <$（<$= 0，1）和1 s3 <$（<$= 0，1，2）激发态精细结构能级的速率系数.我们比较我们的结果与以前的计算结果的速率系数，并指出显着的差异，因为我们更准确地表示共振和相对论效应。
The Dirac R-matrix theory is used to calculate the collision strengths for electron impact excitation of He-like ions (S14+, Ca18+ and Fe24+) using the Dirac atomic R-matrix code, which has been developed mainly by Norrington and Grant (Norrington P H and Grant I P 1987 J. Phys. B: At. Mol. Phys. 20 4869). The lowest 31 target levels are included in the calculation. Rate coefficients are obtained for transitions from the ground 1s2 1S0 state to the fine-structure levels of all excited states of 1s2ℓ (ℓ = 0,1) and 1s3ℓ (ℓ = 0,1,2) configurations. We compare our results for rate coefficients with the results of previous calculations, and indicate where significant differences arise because of our more accurate representation of resonance and relativistic effects.