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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">10.56304/S207956292506003X</article-id><article-id custom-type="edn" pub-id-type="custom">WHTSQM</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-645</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 газового разряда и плазмы</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Gas Discharge and Plasma Physics</subject></subj-group></article-categories><title-group><article-title>ДИНАМИКА КОНЦЕНТРАЦИИ МОЛЕКУЛ H2O И О2 В ТЛЕЮЩЕМ РАЗРЯДЕ HE + O2</article-title><trans-title-group xml:lang="en"><trans-title>DYNAMICS OF CONCENTRATIONS OF H2O AND O2 MOLECULES IN A HE + O2 GLOW DISCHARGE</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>Бернацкий</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bernatskiy</surname><given-names>A. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочетов</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kochetov</surname><given-names>I. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лагунов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lagunov</surname><given-names>V. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Очкин</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Ochkin</surname><given-names>V. N.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Физический институт им. П.Н. Лебедева Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lebedev Physical Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Физический институт им. П.Н. Лебедева Российской академии наук;&#13;
Государственный научный центр РФ “Троицкий институт инновационных и термоядерных исследований”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lebedev Physical Institute of the Russian Academy of Sciences;&#13;
SRC RF Troitsk Institute for Innovation and Fusion Research</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>04</month><year>2026</year></pub-date><volume>17</volume><issue>2</issue><fpage>310</fpage><lpage>315</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бернацкий А.В., Кочетов И.В., Лагунов В.В., Очкин В.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бернацкий А.В., Кочетов И.В., Лагунов В.В., Очкин В.Н.</copyright-holder><copyright-holder xml:lang="en">Bernatskiy A.V., Kochetov I.V., Lagunov V.V., Ochkin V.N.</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/645">https://npe.elpub.ru/jour/article/view/645</self-uri><abstract><p>Исследовано поведение концентраций молекул воды и кислорода под действием тлеющего разряда постоянного тока в смесях He (0.5 мбар) + H2O (0, 0.1, 0.25 мбар) + O2 (0, 1, 2, 3 мбар) в кварцевой разрядной трубке при давлении несколько миллибар и временах порядка сотен секунд. Измерения концентраций проводились методом диодной лазерной спектроскопии поглощения, разработан спектрометр с внешним резонатором и двумя независимыми измерительными каналами, работающими одновременно, в областях спектра около 760 и 1390 нм. В результате эксперимента выявлен рост объемной плотности воды в разряде. Создана кинетическая 0D модель, включающая плазмохимические реакции, протекающие в объеме и на стенке разрядной трубки. На основе сопоставления экспериментальных и расчетных данных сделан вывод, что наиболее вероятным механизмом, приводящим к росту объемной плотности воды в разряде может быть реакция молекул воды, адсорбированных на поверхности, с атомарным кислородом, образующимся в разряде из молекулярного посредством диссоциации.</p></abstract><trans-abstract xml:lang="en"><p>The behavior of water and oxygen molecule concentrations under the action of a direct current glow discharge in mixtures with helium in a quartz discharge tube at a pressure of several millibars and times of the order of hundreds of seconds was studied. Concentration measurements were performed by the method of diode laser absorption spectroscopy; a spectrometer with an external resonator and two independent measuring channels operating simultaneously in the spectral regions near 760 and 1390 nm was developed. During the experiment, a violation of the hydrogen balance in the gas phase was revealed. A kinetic 0D model was created, which included plasma-chemical reactions occurring in the volume and on the wall of the discharge tube. Based on a comparison of experimental and calculated data, a conclusion was made that the most probable mechanism for the violation of the hydrogen balance in the gas phase can be the reaction of atomic oxygen formed during the discharge with water molecules adsorbed on the surface of the tube.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>плазма</kwd><kwd>лазерная спектроскопия</kwd><kwd>плазмохимия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>plasma</kwd><kwd>laser spectroscopy</kwd><kwd>plasma chemistry</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы приносят благодарность разработчиком программы CWB М.A. Деминскому и В.A. Хорькову за консультации по программному продукту и обсуждение результатов работы. Мы признательны Н.А. Дятко за помощь по вопросам кинетики электронов, И.В. Николаеву за консультации по технике диодной спектроскопии и И.П. Южаковой за участие в создании экспериментальной установки.</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">Фортов В.Е. (гл. ред.), Очкин В.Н. (отв. ред.) Энциклопедия низкотемпературной плазмы Т. 3-2 Термодинамические, оптические и транспортные свойства низкотемпературной плазмы Ч. 1 Оптические свойства низкотемпературной плазмы. 2008. Москва: Янус-К.</mixed-citation><mixed-citation xml:lang="en">Фортов В.Е. (гл. ред.), Очкин В.Н. (отв. ред.) Энциклопедия низкотемпературной плазмы Т. 3-2 Термодинамические, оптические и транспортные свойства низкотемпературной плазмы Ч. 1 Оптические свойства низкотемпературной плазмы. 2008. Москва: Янус-К.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Ochkin V.N. 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