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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-919</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>Предотвращение самообращения D-линий в лазерно-эмиссионной спектроскопии следовых количеств натрия в почве</article-title><trans-title-group xml:lang="en"><trans-title>Avoiding Self-Reversed D Lines in Laser-Induced Breakdown Spectroscopy of Trace-Level Sodium in Soil</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>Hu</surname><given-names>W.</given-names></name><name name-style="western" xml:lang="en"><surname>Hu</surname><given-names>W.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Питтсбург, штат Пенсильвания 15260</p></bio><bio xml:lang="en"><p>Department of Physics and Astronomy</p><p>Pittsburgh, PA 15260</p></bio><email xlink:type="simple">weh40@pitt.edu</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>Agelet</surname><given-names>L. E.</given-names></name><name name-style="western" xml:lang="en"><surname>Agelet</surname><given-names>L. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Эймс, штат Айова 50011</p></bio><bio xml:lang="en"><p>Department of Agricultural and Biosystems Engineering</p><p>Ames, IA 50011</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Shen</surname><given-names>X. K.</given-names></name><name name-style="western" xml:lang="en"><surname>Shen</surname><given-names>X. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Штат Линкольн, Небраска, 68588-0511</p></bio><bio xml:lang="en"><p>Department of Electrical and Computer Engineering</p><p>Lincoln, NE 68588-0511</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>He</surname><given-names>X. N.</given-names></name><name name-style="western" xml:lang="en"><surname>He</surname><given-names>X. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Штат Линкольн, Небраска, 68588-0511</p></bio><bio xml:lang="en"><p>Department of Electrical and Computer Engineering</p><p>Lincoln, NE 68588-0511</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Huang</surname><given-names>H.</given-names></name><name name-style="western" xml:lang="en"><surname>Huang</surname><given-names>H.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Штат Линкольн, Небраска, 68588-0511</p></bio><bio xml:lang="en"><p>Department of Electrical and Computer Engineering</p><p>Lincoln, NE 68588-0511</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Lu</surname><given-names>Y. F.</given-names></name><name name-style="western" xml:lang="en"><surname>Lu</surname><given-names>Y. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Штат Линкольн, Небраска, 68588-0511</p></bio><bio xml:lang="en"><p>Department of Electrical and Computer Engineering</p><p>Lincoln, NE 68588-0511</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Питтсбурга</institution></aff><aff xml:lang="en"><institution>University of Pittsburgh</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Государственный университет Айовы</institution></aff><aff xml:lang="en"><institution>Iowa State University</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Университет Небраски-Линкольна</institution></aff><aff xml:lang="en"><institution>University of Nebraska-Lincoln</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>10</day><month>10</month><year>2021</year></pub-date><volume>88</volume><issue>5</issue><elocation-id>818(1)-818(7)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Hu W., Agelet L., Shen X., He X., Huang H., Lu Y., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Hu W., Agelet L., Shen X., He X., Huang H., Lu Y.</copyright-holder><copyright-holder xml:lang="en">Hu W., Agelet L., Shen X., He X., Huang H., Lu Y.</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/919">https://zhps.ejournal.by/jour/article/view/919</self-uri><abstract><p>С помощью лазерно-эмиссионной спектроскопии (LIBS) исследованы самообратимые D-линии натрия в лазерно-индуцированной плазме, генерируемые из образцов почвы со следами концентрации натрия 42.3 ppm. Зависимость обратной энергии импульса от энергии, а также пространственно разрешенное поведение самообращения исследованы с использованием импульсного YAG:Nd-лазера (532 нм, 7 нс) и спектрографа с камерой ICCD. По мере увеличения энергии импульса степень самообращения увеличивается, затем быстро уменьшается. Механизм заключается в разделении центров излучения и поглощения по длине волны в сочетании с тем, что центральный и внешний слои плазмы нагреваются одинаково с более высокими импульсами энергии. Это указывает на возможность активного предотвращения самообращения.</p></abstract><trans-abstract xml:lang="en"><p>Self-reversed sodium D lines in laser-induced plasmas generated from soil samples with a sodium trace concentration of 42.3 ppm was examined using laser-induced breakdown spectroscopy (LIBS). The inverse pulse-energy dependence as well as spatially resolved behaviors of self-reversal were investigated using a pulsed Nd:YAG laser (532 nm, 7 ns) and a spectrograph with an ICCD camera. As pulse energy increases, the degree of self-reversal first augments then rapidly diminishes. The mechanism behind this lies in the separation of emission and absorption centers in wavelength, coupled with the fact that the central and outer layers of the plasmas were heated up equally with higher pulse energies. This indicates the possibility of avoiding self-reversal in an active manner.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерно-эмиссионная спектроскопия</kwd><kwd>YAG:Nd-лазер</kwd><kwd>спектр</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser-induced breakdown spectroscopy</kwd><kwd>Nd:YAG laser</kwd><kwd>spectrum</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">M. N. R. Ashfold et al., Chem. Soc. Rev., 33, 23 (2004).</mixed-citation><mixed-citation xml:lang="en">M. N. R. Ashfold et al., Chem. Soc. Rev., 33, 23 (2004).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">T. G. Dietz et al., J. Chem. Phys., 74, No. 11, 6511 (1981).</mixed-citation><mixed-citation xml:lang="en">T. G. Dietz et al., J. Chem. 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