A pseudo-state sensitivity study on hydrogenic ions
A pseudo-state sensitivity study on hydrogenic ions
复制标题
氢离子的赝态敏感性研究
DOI：
10.1088/0953-4075/36/18/301
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
E. Smyth
中科院分区：
文献类型：
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作者：
C. Ballance;N. Badnell;E. Smyth
利用R-矩阵和赝态方法对轻类氢离子的电子碰撞激发进行了研究，以量化耦合到高束缚态/连续态的影响。随着电离阶段的增加，忽略高激发/电离通道的通量损失对我们的紧密耦合展开中明确包含的束缚项之间的激发影响较小。C5+被用作我们的基准研究。在一个温度范围内，标准R矩阵计算和类似的赝态模型计算之间的麦克斯韦平均碰撞强度的差异将是我们判断差异的标准。我们对He+、Li ~（2+）、Be ~（3+）、B ~（4+）、C ~（5+）、O ~（7+）和Ne ~（9+）进行了计算，以便提供n = 5项的激发数据。前五个离子进行了伪态计算，遵循与早期中性氢工作类似的模型，而非伪态计算足以用于剩余的两个离子。这七个计算的结果将增强现有的激励数据集，用于受控核聚变等离子体实验的建模。
An electron-impact excitation study of light hydrogenic ions has been carried out to quantify the effects of coupling to high bound/continuum states utilizing the R-matrix with pseudo-states method. As the ionization stage increases, the neglect of loss of flux into high-lying excitation/ionization channels impacts less upon excitation between the bound terms explicitly included within our close coupling expansion. C5+ is used as our benchmark study. The differences in Maxwell averaged collision strengths between a standard R-matrix calculation and those of a similar pseudo-state model across a range of temperatures shall be our criteria for judging differences. We carried out calculations for He+, Li2+, Be3+, B4+, C5+, O7+ and Ne9+ so as to provide excitation data amongst terms up to n = 5. Pseudo-state calculations were carried out for the first five ions, following a similar model to earlier neutral hydrogen work, whilst non-pseudo-state calculations sufficed for the remaining two ions. The results of these seven calculations will enhance existing excitation data sets for use in the modelling of controlled nuclear fusion plasma experiments.