Results from the application of our optical potential and relativistic optical potential models to positron scattering from gas-phase zinc (Zn) and cadmium (Cd) are presented. In particular, integral cross sections (ICSs) for elastic scattering, positronium formation, summed discrete electronic-state excitation, and ionization scattering processes are reported for both species and over an extended incident positron energy range. From those ICSs, the total cross section is subsequently constructed by taking their sum. We note that there are currently no experimental data available for any of these scattering processes for either species, with earlier computational results being limited to the elastic channel and restricted to relatively narrow incident positron energy regimes. Nonetheless, we construct recommended positron cross section datasets for both zinc and cadmium over the incident positron energy range of 0–10 000 eV. The recommended positron cross section data are subsequently employed in a multi-term Boltzmann equation analysis to simulate the transport of positrons, under the influence of an applied (external) electric field, through the background Zn and Cd gases. Qualitatively similar behavior in the calculated transport coefficients was observed between both species. Finally, for the case of zinc, the present positron transport coefficients are compared against corresponding results from electron transport with some significant differences now being observed.

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来自 IIB 族金属锌和镉的正电子散射：推荐的横截面和传输模拟

介绍了将我们的光势和相对论光势模型应用于气相锌 (Zn) 和镉 (Cd) 的正电子散射的结果。特别是，报告了两种物质和扩展的入射正电子能量范围内的弹性散射、正电子形成、总离散电子态激发和电离散射过程的积分截面 (ICS)。从这些 ICS 中，随后通过取它们的总和来构建总横截面。我们注意到，目前对于任一物种的这些散射过程中的任何一个都没有可用的实验数据，早期的计算结果仅限于弹性通道并仅限于相对较窄的入射正电子能量范围。尽管如此，我们为锌和镉在 0-10 000 eV 的入射正电子能量范围内构建了推荐的正电子横截面数据集。推荐的正电子截面数据随后用于多项玻尔兹曼方程分析，以模拟正电子在外加电场影响下穿过背景 Zn 和 Cd 气体的传输。在计算的传输系数中观察到两种物种之间的定性相似行为。最后，对于锌，目前的正电子传输系数与电子传输的相应结果进行了比较，现在观察到一些显着差异。推荐的正电子截面数据随后用于多项玻尔兹曼方程分析，以模拟正电子在外加电场影响下穿过背景 Zn 和 Cd 气体的传输。在计算的传输系数中观察到两种物种之间的定性相似行为。最后，对于锌的情况，将目前的正电子传输系数与电子传输的相应结果进行比较，现在观察到一些显着差异。推荐的正电子截面数据随后用于多项玻尔兹曼方程分析，以模拟正电子在外加电场影响下穿过背景 Zn 和 Cd 气体的传输。在计算的传输系数中观察到两种物种之间的定性相似行为。最后，对于锌，目前的正电子传输系数与电子传输的相应结果进行了比较，现在观察到一些显着差异。