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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">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2026-3-226-232</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-1066</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>Статьи</subject></subj-group></article-categories><title-group><article-title>СЕЧЕНИЯ ИОНИЗАЦИИ ДЛЯ МНОГОКРАТНО ИОНИЗОВАННЫХ АТОМОВ МИШЕНИ И ВЫХОД РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ, ВОЗБУЖДАЕМОГО ИОНАМИ КОБАЛЬТА</article-title><trans-title-group xml:lang="en"><trans-title>IONIZATION CROSS SECTIONS FOR MULTIPLY IONIZED TARGET ATOMS AND THE X-RAY PRODUCTION EXCITED BY COBALT IONS</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>Горлачев</surname><given-names>И. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorlachev</surname><given-names>I. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Дмитриевич Горлачев</p><p>Алматы</p></bio><email xlink:type="simple">igor.gorlachev@inp.kz</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>Киреев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kireev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Владимирович Киреев</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">kireyev@inp.kz</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>Платов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Platov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Валентинович Платов - Научно- технический отдел ускорительных технологий, ускоритель УКП-2-1, старший научный сотрудник.</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">platov@inp.kz</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>Попов</surname><given-names>К. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>K. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Константин Евгеньевич Попов</p><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">k.popov@inp.kz</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт ядерной физики</institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>Institute of Nuclear Physics</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>16</day><month>10</month><year>2026</year></pub-date><volume>0</volume><issue>3</issue><fpage>226</fpage><lpage>232</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Горлачев И.Д., Киреев А.В., Платов А.В., Попов К.Е., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Горлачев И.Д., Киреев А.В., Платов А.В., Попов К.Е.</copyright-holder><copyright-holder xml:lang="en">Gorlachev I.D., Kireev A.V., Platov A.V., Popov K.E.</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://journals.nnc.kz/jour/article/view/1066">https://journals.nnc.kz/jour/article/view/1066</self-uri><abstract><p>Были измерены сечения выхода K, L и M рентгеновского излучения для элементов от Ti до Bi при возбуждении ускоренными пучками ионов 59Co12+ с энергией 94,4 МэВ. Полученные результаты сравнивались с предсказаниями ECPSSR и PWBA теорий, рассчитанными с помощью программы ISICS11.</p><p>Полученные данные показывают, что на общий спад сечения выхода рентгеновского излучения K-оболочки с увеличением атомного номера мишени Z2 накладывается его рост в диапазоне от Z2 = 22 приблизительно до Z2 = 41 с максимумом приблизительно при Z2 = 29. Это явление может быть объяснено тем, что при взаимодействиях, близких к симметричным, через образовавшиеся молекулярные орбитали возможно перемещение электронов между орбиталями сталкивающихся атомов. Следовательно, сечение образования рентгеновского излучения для выбранного химического элемента при анализе методом PIXE может быть селективным образом максимизировано путем подбора режима облучения – энергии и вида падающего иона.</p><p>Опираясь на смещения и уширения рентгеновских линий в полученных спектрах, рассчитаны выходы флуоресценции и сечения ионизации K-оболочек для элементов от титана до молибдена, модифицированные для многократной ионизации. Полученные результаты показывают, что отличия выходов флуоресценции с учетом многократной ионизации от одновакансионных выходов флуоресценции не превышают 35%. Следовательно, наблюдаемые отклонения экспериментальных данных от теоретических не могут быть объяснены только многократной ионизацией без привлечения эффектов, связанных с межорбитальными переходами электронов.</p></abstract><trans-abstract xml:lang="en"><p>The K, L, and M X-ray yield cross sections were measured for elements from Ti to Bi excited by accelerated beams of 94.4 MeV 59Co12+ ions. The results were compared with the predictions of the ECPSSR and PWBA theories, calculated using the ISICS11 program. The obtained data show that the overall decrease in the K-shell X-ray yield cross section with increasing atomic number of the target is accompanied by an increase over the range from Z2 = 22 to Z2 ≈ 41, with a maximum at Z2 ≈ 29. This phenomenon can be explained by the fact that near-symmetric interactions allow electrons to move between the orbitals of colliding atoms through the resulting molecular orbitals. Consequently, the X-ray production cross section for a given chemical element can be selectively maximized by selecting the irradiation mode – the energy and type of the incident ion – during PIXE analysis. Based on the shifts and broadening of X-ray lines in the obtained spectra, fluorescence yields and K-shell ionization cross sections were calculated for elements from titanium to molybdenum, modified for multiple ionization. The results show that the differences between fluorescence yields accounting for multiple ionization and single-vacancy fluorescence yields do not exceed 35%. Consequently, the observed deviations of experimental data from theoretical ones cannot be explained solely by multiple ionization without invoking effects associated with interorbital electron transitions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сечение образования рентгеновского излучения</kwd><kwd>ионы кобальта</kwd><kwd>теория ECPSSR</kwd><kwd>теория PWBA</kwd><kwd>HIPIXE</kwd></kwd-group><kwd-group xml:lang="en"><kwd>x-ray production cross section</kwd><kwd>cobalt ions</kwd><kwd>ECPSSR theory</kwd><kwd>PWBA theory</kwd><kwd>HIPIXE</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках научно-технической программы Министерства энергетики «Развитие комплексных научных исследований в области ядерной и радиационной физики на базе казахстанских ускорительных комплексов»</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">.J. 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