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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">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2020-8-8-12</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1821</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>ГОСУДАРСТВЕННЫЕ ЭТАЛОНЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STATE STANDARDS</subject></subj-group></article-categories><title-group><article-title>Государственный первичный эталон единиц кермы в воздухе, мощности кермы в воздухе, экспозиционной дозы, мощности экспозиционной дозы и потока энергии рентгеновского и гамма-излучений ГЭТ 8-2019</article-title><trans-title-group xml:lang="en"><trans-title>National primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2019</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>Оборин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Oborin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Alexandr V. Oborin</p><p>St. Petersburg</p></bio><email xlink:type="simple">oav@vniim.ru</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>Виллевальде</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Villevalde</surname><given-names>A. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Anna Y. Villevalde</p><p>St. Petersburg</p></bio><email xlink:type="simple">vay@vniim.ru</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>Трофимчук</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Trofimchuk</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Sergey G. Trofimchuk</p><p>St. Petersburg</p></bio><email xlink:type="simple">tsg@vniim.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт им. Д. И. Менделеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>D. I. Mendeleyev Institute for Metrology (VNIIM</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>13</day><month>07</month><year>2023</year></pub-date><volume>0</volume><issue>8</issue><fpage>8</fpage><lpage>12</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Оборин А.В., Виллевальде А.Ю., Трофимчук С.Г., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Оборин А.В., Виллевальде А.Ю., Трофимчук С.Г.</copyright-holder><copyright-holder xml:lang="en">Oborin A.V., Villevalde A.Y., Trofimchuk S.G.</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://www.izmt.ru/jour/article/view/1821">https://www.izmt.ru/jour/article/view/1821</self-uri><abstract><p>Описаны результаты работ по совершенствованию Государственного первичного эталона единиц кермы в воздухе, мощности кермы в воздухе, экспозиционной дозы, мощности экспозиционной дозы и потока энергии рентгеновского и гамма-излучений ГЭТ 8-2011. Работы выполнены в 2019 г. в целях реализации рекомендаций отчёта № 90 Международной комиссии по радиационным единицам и измерениям «Ключевые данные для дозиметрии ионизирующих излучений: эталоны и применение». В уравнения воспроизведения единиц величин на ГЭТ 8-2019 внесены следующие изменения: в области рентгеновского излучения введены новые поправочные коэффициенты свободно-воздушных ионизационных камер и изменено значение относительной стандартной неопределённости средней энергии ионообразования, в области гамма-излучения изменены значения произведения средней энергии ионообразования на отношение массовых тормозных способностей графита к воздуху при измерениях с полостными ионизационными камерами. Уточнены воспроизводимые ГЭТ 8-2019 значения единиц величин.</p></abstract><trans-abstract xml:lang="en"><p>The results of development of the national primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2011 in 2019 are presented according to the recommendations of the ICRU Report No. 90 “Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications”. The following changes are made to the equations for the units determination with the standard: in the field of X-rays, new correction coefficients of the free-air ionization chambers are introduced and the relative standard uncertainty of the average energy to create an ion pair in air is changed; in the field of gamma radiation, the product of the average energy to create an ion pair in air and the electron stopping-power graphite to air ratio for the cavity ionization chambers is changed. More accurate values of the units reproduced by GET 8-2019 are obtained and new metrological characteristics of the standard are stated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эталон</kwd><kwd>рентгеновское излучение</kwd><kwd>гамма-излучение</kwd><kwd>керма в воздухе</kwd><kwd>экспозиционная доза</kwd><kwd>свободно-воздушная ионизационная камера</kwd><kwd>полостная ионизационная камера</kwd></kwd-group><kwd-group xml:lang="en"><kwd>standard</kwd><kwd>X-rays</kwd><kwd>gamma radiation</kwd><kwd>air kerma</kwd><kwd>exposure</kwd><kwd>free-air ionization chamber</kwd><kwd>cavity ionization chamber.</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">Оборин А. В., Виллевальде А. Ю., Трофимчук С. Г. 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