We use the adiabatic-nuclei molecular convergent close-coupling method to perform calculations of 0.01–1000 eV electrons scattering on the $c{}^3\mathrm{\Pi }_u$, $a{}^3\mathrm{\Sigma }_g^{+}$, $B{}^1\mathrm{\Sigma }_u^{+}$, $C{}^1\mathrm{\Pi }_u$, and $EF{}^1\mathrm{\Sigma }_g^{+}$ states of ${\mathrm{H}}_2$ in the $v=0$ vibrational level. Elastic, superelastic, ionization, and grand-total cross sections are presented, as well as cross sections for excitation of the $n=2$–3 singlet and triplet states of ${\mathrm{H}}_2$ (where $n$ is the atomic-limit principle quantum number). Comparison with available theoretical results is made. Good agreement is found with the recent $R$-matrix results [J. Phys. B 53, 245203 (2020)] for most of the exchange and dipole-forbidden transitions, but not for the dipole-allowed transitions. The sources of disagreement were found to be an unconverged partial-wave expansion and the utilization of the fixed-nuclei approximation (as opposed to adiabatic-nuclei) in the $R$-matrix calculations.

中文翻译：

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电子在电子激发的分子氢上的散射的收敛紧密耦合计算

我们使用绝热核分子会聚紧密耦合方法对电子在电子束上的0.01–1000 eV散射进行计算。 $C{}^3\mathrm{\Pi }_{ü}$， $\mathrm{一种}{}^3\mathrm{\Sigma }_G^{+}$， $乙{}^{\mathrm{1个}}\mathrm{\Sigma }_{ü}^{+}$， $C{}^{\mathrm{1个}}\mathrm{\Pi }_{ü}$， 和 $EF{}^{\mathrm{1个}}\mathrm{\Sigma }_G^{+}$ 的状态 ${\mathrm{H}}_{\mathrm{2个}}$ 在里面 $v=0$振动水平。给出了弹性，超弹性，电离和总横截面，以及激发的横截面。$ñ=\mathrm{2个}$–3个单重态和三重态 ${\mathrm{H}}_{\mathrm{2个}}$ （在哪里 $ñ$是原子极限原理量子数）。与可用的理论结果进行了比较。发现与最近的良好协议$\mathrm{[R}$-矩阵结果[ J. Phys。乙 53，245203（2020）]对于大多数交换和偶极-禁戒跃迁，而不是为偶极允许跃迁。发现分歧的原因是未收敛的部分波扩展和固定核近似（与绝热核相对）的利用。$\mathrm{[R}$-矩阵计算。