Abstract Dual and triple ion beam irradiations were performed on alpha-Cr using 5 MeV Fe++, 2.9 MeV He++ and/or 270 keV H+ to study the synergy of hydrogen and helium on cavity formation. Results indicate that co-implantation of helium with iron enhances cavity nucleation and co-implantation of hydrogen with iron augments cavity growth. Under triple beam irradiation, hydrogen also accelerates cavity nucleation via stabilizing initial embryos. First-principles calculations reveal that the presence of helium increases the maximum number of hydrogen atoms that can be captured by a vacancy from 6 to 9, providing an atomistic explanation to the triple beam synergy.

中文翻译：

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阐明多离子束照射下 α Cr 中的 He-H 辅助腔演化

摘要 使用 5 MeV Fe++、2.9 MeV He++ 和/或 270 keV H+ 对 α-Cr 进行双离子束和三束离子束辐照，以研究氢和氦对空腔形成的协同作用。结果表明，氦与铁的共同注入增强了空腔成核，而氢与铁的共同注入增强了空洞的生长。在三束照射下，氢还通过稳定初始胚胎来加速空腔成核。第一性原理计算表明，氦的存在使空位可以捕获的氢原子的最大数量从 6 个增加到 9 个，这为三束协同作用提供了原子学解释。