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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.2026-1-96-100</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-2422</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>ИЗМЕРЕНИЯ ИОНИЗИРУЮЩИХ ИЗЛУЧЕНИЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>IONIZING RADIATION MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Применение оптимизированных аттенюаторов в поверочных установках для увеличения равномерной области поля гамма-излучения</article-title><trans-title-group xml:lang="en"><trans-title>Using optimized attenuators in calibration facilities to increase width beam of uniform Gamma-radiation field</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-3590-7884</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ярощик</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yaroshchyk</surname><given-names>K. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Константин Владимирович Ярощик, ведущий инженер-конструктор научно-технического отдела</p><p>220084, Минск, ул. Ф. Скорины, д. 51/1</p></bio><bio xml:lang="en"><p>Kanstantsin V. Yaroshchyk, Leading Design Engineer of R&amp;D</p><p>220084, Minsk, Skaryna st., 51/1</p></bio><email xlink:type="simple">yaroshchik@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «Радметрон»</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Radmetron Ltd</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>14</day><month>03</month><year>2026</year></pub-date><volume>75</volume><issue>1</issue><fpage>96</fpage><lpage>100</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/2422">https://www.izmt.ru/jour/article/view/2422</self-uri><abstract><p>Рассмотрена оптимизация геометрического размера равномерной области поля гамма-излучения – одной из важнейших метрологических характеристик дозиметрических рентгеновских и гамма-установок. Проанализировано влияние геометрической формы свинцовых аттенюаторов поверочных установок на размер равномерной области поля гамма-излучения. Показано, что использование аттенюаторов классической формы приводит к значительному уменьшению зоны равномерности, что ограничивает количество одновременно поверяемых дозиметрических приборов, предназначенных для измерений мощности кермы в воздухе. Проведены экспериментальные измерения мощности кермы в воздухе на установке с различными комбинациями аттенюаторов, а также выполнено сравнение с опубликованными данными. На основе результатов предложена оптимизированная форма аттенюатора, обеспечивающая как требуемую кратность ослабления, так и сохранение размера равномерной области поля гамма-излучения. Представлена конструктивная реализация оптимизированных аттенюаторов, защищённая патентом Евразийского патентного ведомства, что подтверждает новизну предложенного технического решения. Полученные данные можно использовать при создании и модернизации поверочных установок гамма-излучения.</p></abstract><trans-abstract xml:lang="en"><p>This paper examines the optimization of one of the most important metrological characteristics of dosimetric X-ray and gamma-ray installations – the geometric size of the uniform field of the gamma radiation field. The influence of the geometric shape of lead attenuators in verification installations on the size of the uniform region of the gamma radiation field is analyzed. It is shown that the use of classically shaped attenuators leads to a significant reduction in the width beam of uniform, which limits the number of simultaneously verified dosimetric instruments designed for measuring the air kerma rate. Experimental measurements of the air kerma rate were conducted using a setup with various attenuator combinations, and a comparison with published data was made. Based on the results, an optimized attenuator shape is proposed, ensuring both the required attenuation factor and maintaining the size of the uniform region of the gamma radiation field. A design implementation of optimized attenuators is presented, protected by a patent from the Eurasian Patent Office, confirming the novelty of the proposed technical solution.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гамма-излучение</kwd><kwd>аттенюатор</kwd><kwd>равномерность поля</kwd><kwd>поверочная установка</kwd><kwd>дозиметрия</kwd><kwd>ослабление</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gamma radiation</kwd><kwd>attenuator</kwd><kwd>field uniformity</kwd><kwd>calibration facility</kwd><kwd>dosimetry</kwd><kwd>attenuation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Автор заявляет, что во время подготовки данной рукописи не было получено никаких средств, грантов или другой поддержки.</funding-statement><funding-statement xml:lang="en">The authors declares that no funds, grants, or other support were received during the preparation of this manuscript.</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">Mapes J. 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