Abstract We report the rotational excitation of O2 molecule by positron impact for energies between 0.01 and 5.0 eV. The T-matrices were obtained by the method of continued fractions within the positron correlation-polarisation potential considering different levels of polarisation description. The rotational cross sections were computed with T-matrices in conjunction with the adiabatic rotational approximation. Comparison of the results indicate that the more sophisticated polarisation potential framework slightly reshapes the cross section, as expected, since such enhancement in the polarisation does not directly alter the transition. Thus, the small increase is due the partial waves ( l i , m i ) = ( l f , m f ) , that are in accordance with the selection rules of the transition, which are affected by the more complete description of the polarisation potential. We also show how our results compare with the other positron correlation-polarisation potential data available in literature.

中文翻译：

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正电子碰撞对 O2 的旋转激发

摘要 我们报告了能量在 0.01 到 5.0 eV 之间的正电子碰撞对 O2 分子的旋转激发。考虑到不同水平的极化描述，T 矩阵是通过正电子相关极化势内的连分数方法获得的。旋转截面是用 T 矩阵结合绝热旋转近似计算的。结果的比较表明，正如预期的那样，更复杂的极化电位框架稍微重塑了横截面，因为极化的这种增强不会直接改变转变。因此，小的增加是由于部分波 ( li , mi ) = ( lf , mf ) ，符合转换的选择规则，受更完整的极化电位描述的影响。我们还展示了我们的结果如何与文献中可用的其他正电子相关极化电位数据进行比较。