Analysis of structural transformations in natural quartzites under the influence of gamma irradiation

• Дата: 2021
• Автори: Bereznyak, E.P., Dikiy, N.P., Kolodiy, I.V., Medvedeva, E.P., Khodyreva, Yu.S.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2021
• Назва видання: Вопросы атомной науки и техники
• Теми: Physics of radiation damages and effects in solids
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/195440
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Analysis of structural transformations in natural quartzites under the influence of gamma irradiation / E.P. Bereznyak, N.P. Dikiy, I.V. Kolodiy, E.P. Medvedeva, Yu.S. Khodyreva // Problems of Atomic Science and Technology. — 2021. — № 5. — С. 37-41. — Бібліогр.: 9 назв. — англ.

Using the methods of IR spectroscopy, crystal-optical and XRD analysis the evolution of the structure of Ovruch deposit natural quartzites under the influence of γ-irradiation in the range of absorbed doses (Dabs = 10⁶…3.5⋅10⁷ Gy) has been researched. The elemental composition of natural quartzites was determined by the gamma activation method on a linear electron accelerator. It was found that as a result of irradiation the crystal structure of quartz, which forms the basis of quartzite, is improved due to radiation annealing of the defects in the initial structure. At the same time crystallization of amorphous silica, which fringes large grains of quartz, occurs with its transformation into fine-crystalline quartz. These processes do not lead to cracking in the quartzite rock. Obtained data indicates a high radiation resistance of the Ovruch deposit quartzites and confirms the prospects of using this geological formation as a natural barrier for the construction of radioactive waste long-term storage.