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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1766</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Фотоионизация ридберговских состояний ионов K III</article-title><trans-title-group xml:lang="en"><trans-title>PHOTOIONIZATION OF RYDBERG STATES OF K III 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>Sakho</surname><given-names>I.</given-names></name><name name-style="western" xml:lang="en"><surname>Sakho</surname><given-names>I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тиес</p></bio><bio xml:lang="en"><p>Thies</p></bio><email xlink:type="simple">ibrahima.sakho@univ-thies.sn</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>Gning</surname><given-names>M. T.</given-names></name><name name-style="western" xml:lang="en"><surname>Gning</surname><given-names>M. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тиес</p></bio><bio xml:lang="en"><p>Thies</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>Diallo</surname><given-names>A.</given-names></name><name name-style="western" xml:lang="en"><surname>Diallo</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тиес</p></bio><bio xml:lang="en"><p>Thies</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Иба Дер Тиам</institution></aff><aff xml:lang="en"><institution>Department of Physics Chemistry, UFR Sciences and Technologies Iba Der Thiam University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2025</year></pub-date><volume>92</volume><issue>1</issue><fpage>127</fpage><lpage>127</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sakho I., Gning M.T., Diallo A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Sakho I., Gning M.T., Diallo A.</copyright-holder><copyright-holder xml:lang="en">Sakho I., Gning M.T., Diallo 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://zhps.ejournal.by/jour/article/view/1766">https://zhps.ejournal.by/jour/article/view/1766</self-uri><abstract><p>Рассчитаны точные энергии резонансов и квантовые дефекты для серий ридберговских состояний от основного состояния 3s2 3p5  (2 P°3/2) и метастабильного состояния 3s2 3p5  (2 P°3/2) ионов K III до n = 30. Теоретическая фотоионизация выполнена в рамках метода экранирующей константы на единицу заряда ядра (SCUNC). Предсказанные SCUNC значения хорошо согласуются с единственными доступными измерениями усовершенствованного источника света (ALS). Некоторые перекрывающиеся пики в измерениях ALS четко идентифицируются с помощью расчетов SCUNC. Продемонстрирована перспективность формализма SCUNC для применения при анализе измерений синхротронного излучения. </p></abstract><trans-abstract xml:lang="en"><p>Accurate resonance energies and quantum defects for various Rydberg series originating from the 3s2 3p5  (2 P°3/2) ground and 3s2 3p5  (2 P°3/2) metastable states of K III ions are reported up to n = 30. Theoretical photoionization is performed in the framework of the screening constant per unit nuclear charge (SCUNC) method. The SCUNC predictions, believed to be the first calculations, agree very well with the only available advanced light source (ALS) measurements. Some of the overlap peaks in the ALS measurements are clearly identified via the present SCUNC calculations. The present work demonstrates the strength of the SCUNC formalism to assist experimenters in the analysis of measurements from synchrotron radiation. New data are tabulated for n = 15–30. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>фотоионизация</kwd><kwd>энергия резонанса</kwd><kwd>квантовый дефект</kwd><kwd>основное состояние</kwd><kwd>метастабильное состояние</kwd><kwd>серия Ридберга</kwd><kwd>ионы K III</kwd><kwd>SCUNC</kwd></kwd-group><kwd-group xml:lang="en"><kwd>photoionization</kwd><kwd>resonance energy</kwd><kwd>quantum defect</kwd><kwd>ground state</kwd><kwd>metastable state</kwd><kwd>Rydberg series</kwd><kwd>K III ions</kwd><kwd>SCUNC</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">N. Amin et al., J. Quant. Spectrosc. Radiat. 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