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Structural defects caused by swift ions in fluorite single crystals

机译：萤石单晶中快速离子引起的结构缺陷

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摘要

A comparative study of radiation damage caused by the irradiation of oxygen-free calcium fluoride single crystals with similar to GeV Xe-132 or Bi-209 heavy ions, 100-keV light hydrogen ions (protons) or X-rays at room temperature has been performed. Optical absorption in a wide spectral region from NIR to VUV (1.5 -10.5 eV), its dependence on stepwise preheating of the irradiated CaF2 crystals to a certain temperature as well as thermally stimulated luminescence accompanying the main annealing stages have been analyzed. It is shown that in addition to different F-type aggregates, Ca colloids and trifluorine quasi molecules, complex and temperature stable structural defects responsible for VUV absorption (in particular, the 9.8 eV band) are induced in CaF2 only after irradiation with swift heavy ions. The origin and tentative creation mechanisms of such defects as well as the features of the used irradiation types are considered. (C) 2017 Elsevier B.V. All rights reserved.
机译：在室温下对类似于GeV Xe-132或Bi-209重离子，100keV轻氢离子（质子）或X射线辐照无氧氟化钙单晶造成的辐射损伤进行了比较研究。执行。分析了从NIR到VUV（1.5 -10.5 eV）的宽光谱区域中的光吸收，其对辐照的CaF2晶体逐步预热至一定温度的依赖性以及伴随主要退火阶段的热激发发光。结果表明，除了不同的F型聚集体，Ca胶体和三氟准分子外，仅在用快速重离子辐照后，CaF2才会诱发引起VUV吸收的复杂且温度稳定的结构缺陷（特别是9.8 eV谱带）。 。考虑这种缺陷的起源和试验性产生机理，以及所使用的辐射类型的特征。 （C）2017 Elsevier B.V.保留所有权利。

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