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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-81</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>НОВАЯ МНОГОПРОХОДНАЯ ЯЧЕЙКА ДЛЯ ИЗМЕРЕНИЯ ИЗОТОПОВ УГЛЕРОДА МЕТАНА С ИСПОЛЬЗОВАНИЕМ ПЕРЕСТРАИВАЕМОГО ДИОДНОГО ЛАЗЕРА, ФУНКЦИОНИРУЮЩЕГО В БЛИЖНЕЙ ИК ОБЛАСТИ СПЕКТРА</article-title><trans-title-group xml:lang="en"><trans-title>A NOVEL MULTI-PASS CELL SYSTEM FOR MEASUREMENTS OF METHANE CARBON ISOTOPES USING A NEAR-INFRARED TUNABLE DIODE LASER</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>Niu</surname><given-names>M. .</given-names></name><name name-style="western" xml:lang="en"><surname>Niu</surname><given-names>M. .</given-names></name></name-alternatives><email xlink:type="simple">niumingsheng@126.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>Wang</surname><given-names>G. .</given-names></name><name name-style="western" xml:lang="en"><surname>Wang</surname><given-names>G. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Zhu</surname><given-names>G. .</given-names></name><name name-style="western" xml:lang="en"><surname>Zhu</surname><given-names>G. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Wang</surname><given-names>L. .</given-names></name><name name-style="western" xml:lang="en"><surname>Wang</surname><given-names>L. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Mei</surname><given-names>J. .</given-names></name><name name-style="western" xml:lang="en"><surname>Mei</surname><given-names>J. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Liu</surname><given-names>K. .</given-names></name><name name-style="western" xml:lang="en"><surname>Liu</surname><given-names>K. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Gao</surname><given-names>X. .</given-names></name><name name-style="western" xml:lang="en"><surname>Gao</surname><given-names>X. .</given-names></name></name-alternatives><email xlink:type="simple">xmgao@aiofm.ac.cn</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>Zhang</surname><given-names>W. .</given-names></name><name name-style="western" xml:lang="en"><surname>Zhang</surname><given-names>W. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Анхoйский институт оптики и точной механики, Китайская академия наук; Институт лазерных технологий, Цюйфуский педагогический университет</institution></aff><aff xml:lang="en"><institution>Anhui Institute of Optics &amp; Fine Mechanics,Chinese Academy of Sciences; Technology and Laser Institute, Qufu Normal University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Анхoйский институт оптики и точной механики, Китайская академия наук</institution></aff><aff xml:lang="en"><institution>Anhui Institute of Optics &amp; Fine Mechanics,Chinese Academy of Sciences</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>84</volume><issue>3</issue><fpage>463</fpage><lpage>468</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Niu M..., Wang G..., Zhu G..., Wang L..., Mei J..., Liu K..., Gao X..., Zhang W..., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Niu M..., Wang G..., Zhu G..., Wang L..., Mei J..., Liu K..., Gao X..., Zhang W...</copyright-holder><copyright-holder xml:lang="en">Niu M..., Wang G..., Zhu G..., Wang L..., Mei J..., Liu K..., Gao X..., Zhang W...</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/81">https://zhps.ejournal.by/jour/article/view/81</self-uri><abstract><p>Для измерения числа изотопов углерода, разбавленных азотом, разработан лазерный абсорбционный спектрометр с многопроходной ячейкой, основанный на использовании лазера с распределенной обратной связью, излучающего в ближней ИК области спектра (l = 1.658 мкм). С точностью ±11 мК и ±3.2 Пa измерены температура и давление в системе. Спектрометр имеет малый объем, надежен и компактен. Для минимизации влияния температуры на результаты измерений предложено использовать две пары линий поглощения с подобной температурной зависимостью. Абсорбционный спектрометр продемонстрировал высокую точность (концентрации измеряемых изотопов ~0.9‰ в метане, концентрация которого 300 м.д. по объему). Данное соотношение концентраций удовлетворяет исследованию большинства источников CH4. </p></abstract><trans-abstract xml:lang="en"><p>A novel multi-pass cell laser absorption spectrometer to measure δ13C diluted with nitrogen using a 1.658 μm near-infrared distributed-feedback laser was developed. The system temperature and pressure were measured with an accuracy of ±11 mK and ±3.2 Pa, respectively. The spectrometer is small, reliable, and compact. To minimize the temperature effect in absorbance ratio measurements, we used two appropriate absorption line pairs with nearly the same temperature dependences. The absorption spectrometer demonstrated high precision (a repetitive precision (reproducibility) of ~0.9‰ (1s) is obtained at 300 ppmv methane concentrations). This concentration ratio is adequate for most CH4 source characterization studies. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>измерение изотопов</kwd><kwd>многопроходная ячейка</kwd><kwd>стабильность системы</kwd><kwd>точное измерение</kwd><kwd>isotope measurement</kwd><kwd>novel multi-pass cell</kwd><kwd>the stability of the system</kwd><kwd>measurement precise</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">C. J. Sapart, G. Monteil, M. Prokopiou, R. S. W. van de Wal, J. O. Kaplan, P. Sperlich, K. M. Krumhardt, C. van der Veen, S. Houweling, M. 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