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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-224</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>РЕЗОНАНСНЫЕ ДВУХФОТОННЫЕ ПЕРЕХОДЫ</article-title><trans-title-group xml:lang="en"><trans-title>THE RESONANT TWO-PHOTON TRANSITIONS</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>Апанасевич</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Apanasevich</surname><given-names>P. A.</given-names></name></name-alternatives><email xlink:type="simple">p.apanasevich@dragon.bas-net.by</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>Тимофеева</surname><given-names>Г. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Timofeeva</surname><given-names>G. I.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики НАН Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>85</volume><issue>2</issue><fpage>231</fpage><lpage>235</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Апанасевич П.А., Тимофеева Г.И., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Апанасевич П.А., Тимофеева Г.И.</copyright-holder><copyright-holder xml:lang="en">Apanasevich P.A., Timofeeva G.I.</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/224">https://zhps.ejournal.by/jour/article/view/224</self-uri><abstract><p>Развита теория двухфотонного перехода в случае, когда частоты поглощаемого или испускаемого излучения попадают в резонанс с переходами на один из промежуточных уровней среды. Определены условия, при которых такие резонансные двухфотонные переходы могут играть существенную роль.</p></abstract><trans-abstract xml:lang="en"><p>А theory of the two-photon transition has been developed for the case when the frequencies of absorbed and emitted radiation are in resonance with transitions on one intermediate level of the medium. The conditions are determined for which these resonant two-photon transitions can play a major role.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нелинейная оптика</kwd><kwd>двухфотонный переход</kwd><kwd>заселенность уровня</kwd><kwd>двухфотонные поглощение и испускание</kwd><kwd>nonlinear optics</kwd><kwd>two-photon transition</kwd><kwd>level populations</kwd><kwd>two-photon absorption and emission</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">П. А. Апанасевич. Весцi АН БССР, сер. фiз-мат. навук, № 4 (1965) 89-109</mixed-citation><mixed-citation xml:lang="en">П. А. Апанасевич. Весцi АН БССР, сер. фiз-мат. навук, № 4 (1965) 89-109</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">B. Honig, J. Jortner, A. Scoke. J. Chem. Phys., 46 (1967) 2714-2727</mixed-citation><mixed-citation xml:lang="en">B. Honig, J. Jortner, A. Scoke. J. Chem. Phys., 46 (1967) 2714-2727</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">R. M. Hochstrasser, H. N. Sung, J. E. Wessel. J. Chem. Phys., 58 (1973) 4694-4695</mixed-citation><mixed-citation xml:lang="en">R. M. Hochstrasser, H. N. Sung, J. E. Wessel. J. Chem. Phys., 58 (1973) 4694-4695</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">В. А. Орлович, П. А. Апанасевич. Журн. прикл. спектр., 21 (1974) 613-620 [V. A. Orlovich, P. A. Apanasevich. J. Appl. Spectr., 21 (1974) 1303-1308]</mixed-citation><mixed-citation xml:lang="en">В. А. Орлович, П. А. Апанасевич. Журн. прикл. спектр., 21 (1974) 613-620 [V. A. Orlovich, P. A. Apanasevich. J. Appl. Spectr., 21 (1974) 1303-1308]</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">П. А. Апанасевич. Основы теории взаимодействия света с веществом, Минск, Наука (1977)</mixed-citation><mixed-citation xml:lang="en">П. А. Апанасевич. Основы теории взаимодействия света с веществом, Минск, Наука (1977)</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">R. R. Birge, B. M. Pierce. J. Chem. Phys., 70 (1979) 165-178</mixed-citation><mixed-citation xml:lang="en">R. R. Birge, B. M. Pierce. J. Chem. Phys., 70 (1979) 165-178</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">D. M. Friedrich, W. M. McClain. An. Rev. Phys. Chem, 31 (1980) 559-577</mixed-citation><mixed-citation xml:lang="en">D. M. Friedrich, W. M. McClain. An. Rev. Phys. Chem, 31 (1980) 559-577</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">P. Sperber. A. Penzkofer. Opt. Quantum Electron., 18 (1986) 381-401</mixed-citation><mixed-citation xml:lang="en">P. Sperber. A. Penzkofer. Opt. Quantum Electron., 18 (1986) 381-401</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">P. R. Callis. Ann. Rev. Phys. Chem., 48 (1997) 271-297</mixed-citation><mixed-citation xml:lang="en">P. R. Callis. Ann. Rev. Phys. Chem., 48 (1997) 271-297</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">N. S. Makarov, M. Drobisher, A. Rebane. Opt. Express, 16 (2008) 4029-4047</mixed-citation><mixed-citation xml:lang="en">N. S. Makarov, M. Drobisher, A. Rebane. Opt. Express, 16 (2008) 4029-4047</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">H. M. Kim, B. R. Cho. Chem. Commun. (2009) 153-164</mixed-citation><mixed-citation xml:lang="en">H. M. Kim, B. R. Cho. Chem. Commun. (2009) 153-164</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">И. Р. Шен. Принципы нелинейной оптики, Москва, Наука (1989)</mixed-citation><mixed-citation xml:lang="en">И. Р. Шен. Принципы нелинейной оптики, Москва, Наука (1989)</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
