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arXiv physics/0612203physics.chem-phastro-phphysics.atom-ph
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N2分子低能电子碰撞激发积分和微分截面的R矩阵计算

R-matrix calculation of integral and differential cross sections for low-energy electron impact excitations of N2 molecule

Motomichi Tashiro, Keiji Morokuma

摘要:

采用基于态平均完全活性空间SCF轨道的固定键R矩阵方法研究了N-$_2$分子的低能电子碰撞激发。十三个目标电子状态的N $_2$包括在模型中的价配置的目标状态的相互作用表示。计算了$A^{3} Σ_{u}^{+}$、$B^{3} Π_{g}$、$W^{3} Δ_{u}$、${B'}^{3} Σ_{u}^{-}$、${a'}^{1} Σ_{u}^{-}$、$a^{1} Π_{g}$、$w^{1} Δ_{u}$和$C^{3} Π_{u}$态的积分和微分截面,并与以前的实验测量结果进行了比较。这些激发,特别是较高的四个状态,没有得到足够的理论研究,在以前的文献。一般来说,在积分和微分截面中观察到良好的一致性。然而,在$A^{3} Σ_{u}^{+}$和$C^{3} Π_{u}$状态的积分截面中看到一些差异,特别是在峰结构周围。

英文摘要:

Low-energy electron impact excitations of N$_2$ molecules are studied using the fixed-bond R-matrix method based on state-averaged complete active space SCF orbitals. Thirteen target electronic states of N$_2$ are included in the model within a valence configuration interaction representations of the target states. Integrated as well as differential cross sections of the $A^{3} Σ_{u}^{+}$, $B^{3} Π_{g}$, $W^{3} Δ_{u}$, ${B'}^{3} Σ_{u}^{-}$, ${a'}^{1} Σ_{u}^{-}$, $a^{1} Π_{g}$, $w^{1} Δ_{u}$ and $C^{3} Π_{u}$ states are calculated and compared with the previous experimental measurements. These excitations, especially of the higher four states, have not been studied enough theoretically in the previous literature. In general, good agreements are observed both in the integrated and differential cross sections. However, some discrepancies are seen in the integrated cross sections of the $A^{3} Σ_{u}^{+}$ and $C^{3} Π_{u}$ states, especially around a peak structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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