Matter-antimatter interactions

我们看到的大部分光要么是由于原子尺度上粒子之间的碰撞，要么是受其影响。对天文观测、太阳或我们的大气层的理解是以原子碰撞的知识为基础的。它们在聚变、激光和一般光源的发展中也至关重要。与反物质的相互作用在医学和材料科学中有额外的应用。例如，正电子与物质的碰撞用于正电子发射断层扫描（PET）扫描和表面分析。

Much of the light that we see is either due to or is influenced by collisions between particles on the atomic scale. The understanding of astronomical observations, the Sun, or our atmosphere is underpinned by the knowledge of atomic collisions. They are also critical in the development of fusion, lasers and lighting sources generally. Interactions with antimatter have additional applications in the medical and material sciences. For example, positron collisions with matter are used in Positron Emission Tomography (PET) scans and in surface analysis.