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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 custom-type="elpub" pub-id-type="custom">vestifm-237</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>АСПРЕДЕЛЕНИЕ НАЧАЛЬНОЙ ИОНИЗАЦИИ В РАБОЧЕМ ОБЪЕМЕ ИОНИЗАЦИОННОЙ КАМЕРЫ</article-title><trans-title-group xml:lang="en"><trans-title>INITIAL IONIZATION DISTRIBUTION IN THE ACTIVE VOLUME OF THE IONIZATION CHAMBER</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>Хьен</surname><given-names>ЛэТхи Зиеу</given-names></name><name name-style="western" xml:lang="en"><surname>Hien</surname><given-names>Le Thi Dieu</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>Postgraduate</p></bio><email xlink:type="simple">hienle.job@gmail.com</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>Кутень</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuten</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, заведующий лабораторией</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Head of the Laboratory</p></bio><email xlink:type="simple">kut@inp.bsu.by</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>Хрущинский</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrutchinsky</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, ведущий научный сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Leading Researcher</p></bio><email xlink:type="simple">arluchr@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет, Минск</institution></aff><aff xml:lang="en"><institution>Belarusian State University, Minsk</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт ядерных проблем Белорусского государственного университета, Минск</institution></aff><aff xml:lang="en"><institution>Institute for Nuclear Problems of the Belarusian State University, Minsk</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>30</day><month>04</month><year>2017</year></pub-date><volume>0</volume><issue>1</issue><fpage>111</fpage><lpage>119</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хьен Л.З., Кутень С.А., Хрущинский А.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Хьен Л.З., Кутень С.А., Хрущинский А.А.</copyright-holder><copyright-holder xml:lang="en">Hien L.D., Kuten S.A., Khrutchinsky A.A.</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/237">https://vestifm.belnauka.by/jour/article/view/237</self-uri><abstract><p>Рассмотрен вопрос о пространственном распределении пар ионов в рабочем объеме цилиндрической ионизационной камеры деления. Предложена формула для пространственного распределения начальной ионизации в цилиндрической камере деления, в которой слой делящегося вещества нанесен на внутреннюю сторону внешнего электрода. Формула выведена двумя способами: путем подсчета числа пар ионов, генерированных в бесконечно малом объеме внутри рабочего объема камеры всеми треками, исходящими из радиатора. В первом случае бесконечно малый объем имеет форму сферы, во втором – произвольную форму. Формула, полученная без всяких ограничений на направление вылета осколков деления, дает правильное поведение пространственного распределения начальной ионизации как вблизи поверхности радиатора, так и вдали от него. Исследована зависимость начальной плотности ионизации от радиального расстояния до радиатора, создаваемой типичным фрагментом деления – ионом Sr в центре камеры. Исследовано также пространственное распределение начальной плотности ионизации вдоль камеры.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>The task of a spatial distribution of ion pairs in the active volume of the ionization fission chamber has been studied. The formula of a spatial distribution of ion pairs in cylindrical fission chambers, in which a fissile material layer is coated on the internal side of the external electrode, is derived. It is calculated in two ways: counting the number of ion pairs created in the infinitesimal volume inside the active volume of the chamber by all the trajectories, which emanate from a radiator. In the first case, the infinitesimal volume is a sphere. In the second case, it is arbitrary in shape. The formula has evaluated correctly the density of ion pairs at any point in the active volume of the fission chamber. The dependence of the initial density of ion pairs on a radial distance to a radiator created a typical fission fragment – ion Sr in the center of the chamber and the spatial distribution of the initial density of ion pairs along the chamber have been studied.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>ионизационная камера деления</kwd><kwd>радиатор</kwd><kwd>рабочий объем камеры</kwd><kwd>плотность пар ионов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>fission ionization chamber</kwd><kwd>sensitive layer</kwd><kwd>sensitive volume</kwd><kwd>density of ion pairs</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">Малышев, Е. К. Газоразрядные детекторы для контроля ядерных реакторов / Е. К. Малышев, Ю. Б. Засадыч, С. А. 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