Centre for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, N13, W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
Sci Rep. 2013;3:1201. doi: 10.1038/srep01201. Epub 2013 Feb 4.
Randomly distributed lattice point defects such as supersaturated vacancies (SVs) and Frenkel-pairs (FPs, an interstitial and a vacancy) can be simultaneously introduced into the crystal by energetic beam irradiation in outer space and/or nuclear reactors, but their behavior has not been fully understood. Using a high-voltage electron microscope equipped with a laser (laser-HVEM), we show the striking effects of simultaneous laser-electron (photon-electron) dual-beam irradiation on void formation. Our results reveal that during laser-electron sequential irradiation, pre-laser irradiation enhanced void nucleation and subsequent electron irradiation enhanced void growth. However, the laser-electron dual-beam irradiation was analyzed to depress void swelling remarkably because the recombination of SVs and interstitials was enhanced. The results provide insight into the mechanism underlying the dual-beam radiation-induced depression of void swelling in solids.
通过在太空和/或核反应堆中使用高能束辐照，可以随机分布的点晶格缺陷（例如过饱和空位 (SVs) 和弗伦克尔对 (FPs，一个间隙原子和一个空位)）引入晶体，但它们的行为尚未完全理解。使用配备有激光的高压电子显微镜（激光-HVEM），我们展示了同时进行激光-电子（光子-电子）双束辐照对空穴形成的显著影响。我们的结果表明，在激光-电子顺序辐照期间，预激光辐照增强了空穴成核，随后的电子辐照增强了空穴生长。然而，分析表明，激光-电子双束辐照会显著抑制空穴肿胀，因为 SVs 和间隙原子的复合增强了。这些结果为双束辐射抑制空穴肿胀的机制提供了深入的了解。
