Departamento de Fı́sica , Universidade Federal do Paraná , Caixa Postal 19044, 81531-980 Curitiba , Paraná , Brazil.
J Phys Chem A. 2019 Oct 24;123(42):9132-9136. doi: 10.1021/acs.jpca.9b08845. Epub 2019 Oct 15.
We report elastic integral and differential cross sections for positron collisions with pyrazine (CHN), for energies up to 10 eV. The cross sections were calculated with the Schwinger multichannel method in the static plus polarization approximation. Our computed elastic integral cross section indicates the presence of a Ramsauer-Townsend minimum and a bound state in the scattering symmetry. In the absence of results in the literature on collisions of positrons with pyrazine, we compare the present results with results for pyrimidine and benzene molecules available in the literature.
我们报道了能量高达 10 eV 的正电子与吡嗪（CHN）碰撞的弹性积分和微分截面。截面是在静态加极化近似下用 Schwinger 多通道方法计算的。我们计算的弹性积分截面表明散射对称中有一个拉姆萨-汤森德最小值和束缚态。由于文献中没有关于正电子与吡嗪碰撞的结果，我们将目前的结果与文献中可用的嘧啶和苯分子的结果进行了比较。
