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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">npe</journal-id><journal-title-group><journal-title xml:lang="ru">Ядерная физика и инжиниринг</journal-title><trans-title-group xml:lang="en"><trans-title>Nuclear Physics and Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5629</issn><issn pub-type="epub">2079-5637</issn><publisher><publisher-name>МИФИ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.1134/S2079562920040090</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-122</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>Математическое моделирование в ядерных технологиях</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Mathematical Modeling in Nuclear Technologies</subject></subj-group></article-categories><title-group><article-title>Зарядовые свойства тория, имплантированного в оксид кремния</article-title><trans-title-group xml:lang="en"><trans-title>Charge Properties of Thorium Implanted in Silicon Oxide</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>Курельчук</surname><given-names>У. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurelchuk</surname><given-names>U. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское шоссе 31, Москва, 115409</p></bio><bio xml:lang="en"><p>Moscow, 115409</p></bio><email xlink:type="simple">UNKurelchuk@mephi.ru</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>Борисюк</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Borisyuk</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское шоссе 31, Москва, 115409</p></bio><bio xml:lang="en"><p>Moscow, 115409</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Николаев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikolaev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское шоссе 31, Москва, 115409</p><p>Ленинские горы 1, Москва, 119991 </p></bio><bio xml:lang="en"><p>Moscow, 115409</p><p>Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткаля</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tkalya</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каширское шоссе 31, Москва, 115409</p><p>Ленинский пр. 53, Москва, 119991</p><p>Большая Тульская 52, Москва, 115191</p></bio><bio xml:lang="en"><p>Moscow, 115409</p><p>Moscow, 119991</p><p>Moscow, 115191</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет МИФИ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет МИФИ; Институт ядерной физики им. Д.В. Скобельцына МГУ им. М.С. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Skobeltsyn Institute of Nuclear Physics, Lomonosov Mo scow State University (SINP MSU)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет МИФИ; Физический институт им. П.Н. Лебедева РАН; Институт проблем безопасного развития атомной энергетики РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Lebedev Physical Institute of the Russian Academy of Sciences; Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>23</day><month>04</month><year>2024</year></pub-date><volume>11</volume><issue>5</issue><fpage>271</fpage><lpage>277</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Курельчук У.Н., Борисюк П.В., Николаев А.В., Ткаля Е.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Курельчук У.Н., Борисюк П.В., Николаев А.В., Ткаля Е.В.</copyright-holder><copyright-holder xml:lang="en">Kurelchuk U.N., Borisyuk P.V., Nikolaev A.V., Tkalya E.V.</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://npe.elpub.ru/jour/article/view/122">https://npe.elpub.ru/jour/article/view/122</self-uri><abstract><p>В рамках теории функционала плотности проведен о исследование атомов тория, имплантированных в оксид кремния. Изучены зарядовые свойства Th в соединениях ThO2:nSiO2 и Th:nSiO2, где Th выступает в качестве примеси внедрения и замещения в кристобалите. Проведена геометрическая оптимизация структур с учетом межэлектронных  взаимодействий, исследовано самосогласованное распределение электронной плотности, оценены бейдеровские эффективные заряды.</p></abstract><trans-abstract xml:lang="en"><p>A study of thorium atoms implanted in silicon oxide was carried out usimg the density functional theory method. The charge properties of Th in the ThO2:nSiO2 and Th:nSiO2 compounds, where Th acts as an interstitial and substitutional impurity in cristobalite, have been studied. Geometric optimization of structures is carried out with allowance for electron-electron  interactions, self-consistent distribution of electron density is investigated, and Bader effective charges are estimated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>торий-229</kwd><kwd>ядерный переход</kwd><kwd>фотоэлектронная спектроскопия</kwd><kwd>оксид кремния</kwd><kwd>теория функционала плотности</kwd><kwd>распределение электронной плотности</kwd><kwd>эффективный заряд</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thorium-229</kwd><kwd>nuclear transition</kwd><kwd>silicon oxide</kwd><kwd>electron spectroscopy</kwd><kwd>density functional theory</kwd><kwd>charge density</kwd><kwd>Bader charges</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке гранта Российского научного фонда No. 19-72-30014.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Sikorsky T., Geist J. // Phys. 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