تقرير
Many-Body Theory Calculations of Positron Scattering and Annihilation in H$_2$, N$_2$ and CH$_4$
| العنوان: | Many-Body Theory Calculations of Positron Scattering and Annihilation in H$_2$, N$_2$ and CH$_4$ |
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| المؤلفون: | Rawlins, C. M., Hofierka, J., Cunningham, B., Patterson, C. H., Green, D. G. |
| المصدر: | Phys. Rev. Lett. 130, 263001 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Physics - Atomic Physics, Condensed Matter - Strongly Correlated Electrons, Physics - Atomic and Molecular Clusters, Physics - Computational Physics, Quantum Physics |
| الوصف: | The recently developed ab initio many-body theory of positron molecule binding [J. Hofierka et al., Nature, 606, 688 (2022)] is combined with the shifted pseudostates method [A. R. Swann and G. F. Gribakin, Phys. Rev. A 101, 022702 (2020)] to calculate positron scattering and annihilation rates on small molecules, namely H$_2$, N$_2$ and CH$_4$. The important effects of positron-molecule correlations are delineated. The method provides uniformly good results for annihilation rates on all the targets, from the simplest (H$_2$, for which only a sole previous calculation agrees with experiment), to larger targets, where high-quality calculations have not been available. Comment: Main text and Supplemental Material |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.130.263001 |
| URL الوصول: | http://arxiv.org/abs/2303.02083 |
| رقم الأكسشن: | edsarx.2303.02083 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.130.263001 |
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