dc.contributor.author | Skuja, Linards | |
dc.contributor.author | Ollier, Nadège | |
dc.contributor.author | Kajihara, Koichi | |
dc.contributor.author | Smits, Krisjanis | |
dc.date.accessioned | 2020-10-01T13:14:40Z | |
dc.date.available | 2020-10-01T13:14:40Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0022-3093 | |
dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/52546 | |
dc.description | The support from M -ERANET project “MyND” is acknowledged. K.K. was partially supported by the Collaborative Research Project of Laboratory for Materials and Structures, Tokyo Institute of Technology . Visiting researcher support from Ecole Polytechnique, Palaiseau is appreciated. Mr. Olivier Cavani is thanked for the expert help with irradiations. | en_US |
dc.description.abstract | Point defects in crystalline SiO2, created by 2.5 MeV electron irradiation at dose below the amorphization threshold or by fast neutrons, were compared by luminescence spectroscopy. Oxygen dangling bonds (“non-bridging oxygen hole centers”, NBOHCs), peculiar to amorphous state of SiO2, were detected for the first time in electron-irradiated non-amorphized α-quartz crystal. Their presence may signal the formation of nucleation centers in crystal structure as the first step to radiation-induced amorphization. Compared to crystal, irradiated by 1019 cm−2 fast neutrons, their concentration was over 100 times lower, and their inhomogeneous broadening was at least 2.5 times smaller. Divalent silicons (“silicon oxygen deficiency centers”, SiODC(II)), inherent to oxygen-deficient or irradiated SiO2 glass, were detected in neutron-irradiated (1019 n/cm2) α-quartz but were not found after the electron irradiation. Radiation-induced interstitial O2 molecules, characteristic to irradiated glassy SiO2 and other oxide glasses, are found in α-quartz only after neutron irradiation. The oxygen atoms, displaced by the 2.5 MeV e− irradiation of α-quartz for fluences up to 1019 e−/cm2 evidently stays entirely in the peroxy linkage (Si-O-O-Si bond) form. | en_US |
dc.description.sponsorship | M -ERANET; Tokyo Institute of Technology; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier B.V. | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
dc.relation.ispartofseries | Journal of Non-Crystalline Solids;505 | |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
dc.subject | Amorphization | en_US |
dc.subject | Dangling bonds | en_US |
dc.subject | Electron irradiation | en_US |
dc.subject | Luminescence | en_US |
dc.subject | Quartz | en_US |
dc.subject | Silica glass | en_US |
dc.title | Creation of glass-characteristic point defects in crystalline SiO2 by 2.5 MeV electrons and by fast neutrons | en_US |
dc.type | info:eu-repo/semantics/article | en_US |
dc.identifier.doi | 10.1016/j.jnoncrysol.2018.11.014 | |