We present a range of cross section measurements for the low-energy scattering of positrons from pyridine, for incident positron energies of less than 20 eV, as well as the independent atom model with the screening corrected additivity rule including interference effects calculation, of positron scattering from pyridine, with dipole rotational excitations accounted for using the Born approximation. Comparisons are made between the experimental measurements and theoretical calculations. For the positronium formation cross section, we also compare with results from a recent empirical model. In general, quite good agreement is seen between the calculations and measurements although some discrepancies remain which may require further investigation. It is hoped that the present study will stimulate development of ab initio level theoretical methods to be applied to this important scattering system.

中文翻译：

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吡啶的正电子散射

我们提出了一系列的截面测量，用于从吡啶中进行低能散射正电子，入射正电子能量小于20 eV，以及独立的原子模型，并经过筛选校正了加性法则，包括干扰效应计算和正电子散射来自吡啶的偶极旋转激发使用Born近似进行解释。在实验测量值和理论计算值之间进行了比较。对于正电子形成的横截面，我们还与最近的经验模型的结果进行了比较。通常，尽管仍然存在一些差异，可能需要进一步研究，但在计算和测量之间可以看到很好的一致性。希望本研究将刺激从头开始的发展 应用于该重要散射系统的理论方法。