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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2020-56-4-480-487</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-553</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Локальные колебательные моды вакансионно-кислородных комплексов в кристаллическом кремнии при комнатной температуре</article-title><trans-title-group xml:lang="en"><trans-title>Local vibrational modes of vacancy-oxygen-related complexes at room temperature</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Толкачева</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tolkacheva</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Толкачева Екатерина Анатольевна – кандидат физико-математических наук, старший научный сотрудник</p><p>ул. П. Бровки, 19, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Ekaterina A. Tolkacheva – Ph. D. (Physics and Mathematics), Senior Researcher</p><p>19, P. Brovki Str., 220072, Minsk</p></bio><email xlink:type="simple">talkachova@physics.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маркевич</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Markevich</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маркевич Владимир Павлович – кандидат физико-математических наук, старший научный сотрудник</p><p>Manchester M13 9PL, United Kingdom</p></bio><bio xml:lang="en"><p>Vladimir P. Markevich – Ph. D. (Physics and Mathematics), Senior Researcher, Photon Science Institute and School of Electrical and Electronic Engineering</p><p>Manchester M13 9PL, United Kingdom</p></bio><email xlink:type="simple">V.Markevich@manchester.ac.uk</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мурин</surname><given-names>Л. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Murin</surname><given-names>L. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мурин Леонид Иванович – ведущий научный сотрудник, кандидат физико-математических наук</p><p>ул. П. Бровки, 19, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Leonid I. Murin – Ph. D. (Physics and Mathematics), Leading Researcher</p><p>19, P. Brovki Str., 220072, Minsk</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Научно-практический центр Национальной академии наук Беларуси по материаловедению</institution><country>Belarus</country></aff><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет г. Манчестер</institution></aff><aff xml:lang="en"><institution>The University of Manchester</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Научно-практический центр Национальной академии наук Беларуси по материаловедению</institution></aff><aff xml:lang="en"><institution>Scientific and Practical Materials Research Center of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>31</day><month>12</month><year>2020</year></pub-date><volume>56</volume><issue>4</issue><elocation-id>480–487</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Толкачева Е.А., Маркевич В.П., Мурин Л.И., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Толкачева Е.А., Маркевич В.П., Мурин Л.И.</copyright-holder><copyright-holder xml:lang="en">Tolkacheva E.A., Markevich V.P., Murin L.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/553">https://vestifm.belnauka.by/jour/article/view/553</self-uri><abstract><p>Изотопный состав природного кремния (28Si (92,23 %), 29Si (4,68 %) и 30Si (3,09 %)) оказывает заметное влияние на форму полос ИК-поглощения, обусловленных примесными атомами кислорода. В настоящей работе предпринята попытка определить положение локальных колебательных мод (ЛКМ), обусловленных квазимолекулами 28Si-16OS29Si и 28Si-16OS30Si (OS – атом кислорода в узле решетки), для спектров поглощения, измеренных при комнатной температуре. Проведена оценка изотопических сдвигов соответствующих мод путем подгонки формы полосы поглощения для комплекса вакансия–кислород (А-центр) в облученных кристаллах Si. Изотопические сдвиги ЛКМ равны 2,2 ± 0,25 см–1 для 28Si-16OS29Si и 4,3 ± 0,9 см–1 для 28Si-16OS30Si по отношению к полосе 28Si-16OS28Si, а полуширина полосы поглощения А-центра (28Si-16OS28Si) составляет 5,3 ± 0,25 см–1. Методом ИК-спектроскопии установлено, что в температурном интервале отжига дивакансий (200–275 ºС) в облученных кислородсодержащих кристаллах кремния имеет место формирование двух полос поглощения с максимумами у 825,8 и 839,2 см–1. Комплексу дивакансия–кислород V2O, образующемуся путем захвата подвижных V2 междоузельными атомами кислорода Oi , приписана полоса у 825,8 см–1. Относительная интенсивность полосы у 839,2 см–1 существенно увеличивается в образцах, облученных нейтронами, по сравнению с образцами, облученными электронами. Сделано заключение, что эта полоса связана с комплексом тривакансия–кислород V3O, образующимся путем захвата подвижных V3 атомами Oi .</p></abstract><trans-abstract xml:lang="en"><p>The isotopic content of natural silicon (28Si (92.23 %), 29Si (4.68 %) и 30Si (3.09 %)) affects noticeably the shape of IR absorption bands related to the oxygen impurity atoms. In the present work an attempt is undertaken to determine the positions of local vibrational modes (LVMs), related to quasimolecules 28Si16OS29Si and 28Si16OS30Si (OS – substitutional oxygen atom), for the absorption spectra measured at room temperature. An estimation of the isotopic shifts of corresponding modes is done by fitting the shape of the experimentally measured absorption band related to the vacancy–oxygen center in irradiated Si crystals. The LVM isotope shifts are found to be equal 2,2 ± 0.25 cm–1 for 28Si-16OS29Si and 4,3 ± 0,9 см–1 for 28Si-16OS30Si in relation to the basic band due to 28Si-16OS28Si, and the full width at half maximum of the A-center absorption band (28Si-16OS28Si) is 5,3 ± 0.25 cm–1. By means of infrared absorption spectroscopy a clear correlation between the disappearance of the divacancy (V2) in the temperature range 200–275 ºС and appearance of two absorption bands with their maxima at 825.8 and 839.2 cm–1 in irradiated oxygen-rich Si crystals is found. The band positioned at 825.8 cm–1 is assigned to a divacancy-oxygen defect V2O formed via an interaction of mobile V2 with interstitial oxygen (Oi ) atoms. The 839.2 cm–1 band is much more pronounced in neutron irradiated samples as compared to samples irradiated with electrons. We argue that it is related to a trivacancy–oxygen defect (V3O) formed via an interaction of mobile V3 with Oi atoms.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>локальные колебательные моды</kwd><kwd>кремний</kwd><kwd>ИК-поглощение</kwd><kwd>изотопический сдвиг</kwd><kwd>изотопный состав</kwd></kwd-group><kwd-group xml:lang="en"><kwd>local vibrational mode</kwd><kwd>silicon</kwd><kwd>infra-red absorption</kwd><kwd>isotopic shift</kwd><kwd>isotopic content</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Oxygen defect processes in silicon and silicon germanium / A. Chroneos [et al.] // Appl. Phys. Rev. – 2015. – Vol. 2. – P. 021306 (1–15). https://doi.org/10.1063/1.4922251</mixed-citation><mixed-citation xml:lang="en">Chroneos A., Sgourou E. 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