重离子束的反冲分析
Recoil Analysis for Heavy Ion Beams
摘要：
鉴于全球有94家诊所和超过20万名患者接受治疗，质子和碳是重离子治疗中使用最多的重带电粒子。然而，最近在使用新的离子束方面有增加的趋势。每种重离子对目标都有不同的影响。当每个重离子穿过组织时，它们在碰撞中损失了巨大的能量，因此它们的射程并不长。电离是造成能量损失的主要原因。在重带电粒子与靶的这种相互作用期间，粒子不仅会反冲，而且会随着反冲而损失能量。反冲是由原子与原子的碰撞产生的。通过这些碰撞，晶体原子以不同的组合反应，并根据其能量形成级联。因此，次级粒子产生电离和反冲。本文用蒙特卡罗模拟计算了能量范围为2.0-2.5 GeV的硼、碳、氮和氧离子束在水模中的反冲值，并与碳离子束的反冲值进行了比较。观察到，碳和硼离子的反冲峰振幅有规律地增加，不像氧和氮，在氧和氮中看不到这种规律性。此外，晶体结构中的间隙随着能量的增加而增加。
英文摘要：
Given that there are 94 clinics and more than 200,000 patients treated worldwide, proton and carbon are the most used heavily charged particles in heavy ion therapy. However, there is a recent increasing trend in using new ion beams. Each heavy ion has a different effect on the target. As each heavy ion moves through the tissue, they lose enormous energy in collisions, so their range is not long. Ionization accounts for the majority of this loss in energy. During this interaction of the heavily charged particles with the target, the particles do not only ionize, but also lose energy with the recoil. Recoil occurs by atom-to-atom collisions. With these collisions, crystalline atoms react with different combinations and form cascades in accordance with their energies. Thus, secondary particles create ionization and recoil. In this study, recoil values of boron, carbon, nitrogen and oxygen beams in the water phantom were computed in the energy range of 2.0-2.5 GeV using Monte Carlo simulation and the results were compared with carbon. It was observed that there is a regular increase in the recoil peak amplitude for carbon and boron ions, unlike oxygen and nitrogen where such a regularity could not be seen. Moreover, the gaps in the crystal structure increased as the energy increases.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
