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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">vestift</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-технических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physical-technical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8358</issn><issn pub-type="epub">2524-244X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestift-325</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>ЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕН</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING, HEAT AND MASS TRANSFER</subject></subj-group></article-categories><title-group><article-title>РАЗРАБОТКА КОМПЬЮТЕРНОЙ МОДЕЛИ ГЕРМАНИЕВОГО ДЕТЕКТОРА И ПОЛУЧЕНИЕ МОДЕЛЬНЫХ СПЕКТРОВ СТАНДАРТНЫХ ОБРАЗЦОВ УРАНА U3O8 SRM-969</article-title><trans-title-group xml:lang="en"><trans-title>DEVELOPMENT OF A GERMANIUM DETECTOR COMPUTER MODEL AND OBTAINING MODEL SPECTRA OF STANDARD URANIUM U3O8 SRM-969 SAMPLES</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>Загороднюк</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaharadniuk</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер лаборатории физики ядерных реакторов</p></bio><bio xml:lang="en"><p>Engineer, Laboratory of Physics of Nuclear Reactors</p></bio><email xlink:type="simple">fiz.zagorodnAA@bsu.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>Корнеев</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Korneyev</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>заведующий сектором ядерной безопасности и измерений ядерных материалов</p></bio><bio xml:lang="en"><p>Head of the Nuclear Safety and Nuclear Materials Measurement Sector</p></bio><email xlink:type="simple">s.korneyev@sosny.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Объединенный институт энергетических и ядерных исследований –&#13;
Сосны Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Joint Institute for Power and Nuclear Research – Sosny of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>09</day><month>10</month><year>2017</year></pub-date><volume>0</volume><issue>3</issue><fpage>92</fpage><lpage>100</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Загороднюк А.А., Корнеев С.В., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Загороднюк А.А., Корнеев С.В.</copyright-holder><copyright-holder xml:lang="en">Zaharadniuk A.A., Korneyev S.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://vestift.belnauka.by/jour/article/view/325">https://vestift.belnauka.by/jour/article/view/325</self-uri><abstract><p>Проведено компьютерное моделирование гамма-спектров ядерных материалов, измеренных при помощи полупроводникового детектора из особо чистого германия ORTEC GEM25P4-70. В качестве источников гамма-излучения использовались стандартные образцы SRM-969, представляющие собой цилиндрические емкости фиксированного объема, выполненные из алюминиевого сплава (aluminum alloy 6061), заполненные мелкодисперсным порошком оксида урана (U3O8) с различной концентрацией 235U. Определены продукты распада из цепочек радиоактивных превращений изотопов урана 235U и 238U, которые дают наибольший вклад в гамма-спектр оксида урана (U3O8). Разработана методика, позволяющая сопоставить результаты измерений с модельными спектрами. Соответствие измеренных спектров модельным спектрам производилось путем сравнения площадей пиков полного поглощения для энергий 185 и 1001 кэВ, наиболее часто используемых в гамма-спектрометрии для определения обогащения урана. Выбранные параметры модели детектора и источника позволили описать измеренные гамма-спектры с погрешностью не хуже 6 % в площадях пиков полного поглощения в энергетическом диапазоне 150–1100 кэВ. Разработанная модель позволяет получить модельные гамма-спектры различных делящихся материалов при условии наличия сведений об изотопном составе, квантовом выходе гамма-линий для каждого изотопа, активности делящегося материала. Данные модельные спектры могут быть использованы при разработке методик выполнения измерений и тестировании программного обеспечения в области ядерной спектроскопии. Наиболее вероятное применение компьютерной модели – получение модельных спектров для контроля обогащения ядерного топлива и математическая калибровка гамма-спектрометра для неразрушающего анализа ядерных материалов различных конструкций и различного химического и изотопного состава.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>Computer modeling was carried out for gamma-ray spectra of nuclear materials, which were measured by using a semiconductor high-purity germanium detector ORTEC GEM25P4-70. The standard SRM-969 samples were used as sources of gamma radiation, which are cylindrical tanks of fixed volume, made of aluminum alloy 6061, filled with a dispersed uranium oxide powder (U3O8) with different concentrations of 235U. The products from radioactive decay chains are determined for uranium isotopes 235U and 238U, which give the main contribution to the gamma spectrum of uranium oxide (U3O8). A technique that makes it possible to compare the results of measurements with model spectra is developed. The correlation of the measured spectra to the model spectra was made by comparing the areas of the total absorption peaks for energies of 185 keV and 1001 keV, which are often used in gamma spectrometry to determine uranium enrichment. The selected parameters of the model and the source of the detector allowed to describe the measured gamma-ray spectra with an accuracy of better than 6 % at the total areas of the absorption peaks in the energy range 150–1100 keV. The developed model makes it possible to obtain the model of gamma spectra of various fissile materials, provided that there are the data available about the isotopic composition, the quantum yield of gamma lines for each isotope, and the activity of fissile material. These model spectra can be used for the development of measurement techniques and software testing in the field of nuclear spectroscopy.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>компьютерное моделирование</kwd><kwd>ядерное топливо</kwd><kwd>гамма-спектр</kwd><kwd>полупроводниковый детектор</kwd><kwd>оксид урана</kwd><kwd>Монте-Карло</kwd></kwd-group><kwd-group xml:lang="en"><kwd>computer modeling</kwd><kwd>nuclear fuel</kwd><kwd>gamma-ray spectrum</kwd><kwd>semiconductor detector</kwd><kwd>uranium oxide</kwd><kwd>Monte-Carlo</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">Андрушечко, С. А. 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