Understanding and simulating the material behavior during multi-particle irradiations
Understanding and simulating the material behavior during multi-particle irradiations
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DOI：
10.1038/srep30191
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发表时间：
2016-07-28
影响因子：
4.6
通讯作者：
Peuget, S.
中科院分区：
文献类型：
--
作者：
Mir, Anamul H.;Toulemonde, M.;Peuget, S.
许多研究表明，在连续和同时的粒子辐照过程中发生的辐照行为和损伤过程可能有显著差异。目前，对于为什么以及何时会出现这种差异，还没有明确的答案。此外，传统的多粒子辐照设施不能正确地再现空间和核反应堆等许多环境中所经历的复杂辐照情景。因此，需要更好地了解多粒子辐照问题和可能的替代方案。研究了非晶态二氧化硅在连续和同步离子辐照过程中引起的热峰值和缺陷恢复。同时辐照情景相当于包含潜在损伤形成和恢复机制的多个小的顺序辐照情景。结果表明，在非晶二氧化硅同时辐照过程中，各种损伤事件之间没有新的损伤机制和时空相关性。这为模拟和理解复杂的多粒子辐照问题提供了一种新的、方便的方法。
A number of studies have suggested that the irradiation behavior and damage processes occurring during sequential and simultaneous particle irradiations can significantly differ. Currently, there is no definite answer as to why and when such differences are seen. Additionally, the conventional multi-particle irradiation facilities cannot correctly reproduce the complex irradiation scenarios experienced in a number of environments like space and nuclear reactors. Therefore, a better understanding of multi-particle irradiation problems and possible alternatives are needed. This study shows ionization induced thermal spike and defect recovery during sequential and simultaneous ion irradiation of amorphous silica. The simultaneous irradiation scenario is shown to be equivalent to multiple small sequential irradiation scenarios containing latent damage formation and recovery mechanisms. The results highlight the absence of any new damage mechanism and time-space correlation between various damage events during simultaneous irradiation of amorphous silica. This offers a new and convenient way to simulate and understand complex multi-particle irradiation problems.