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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Доклады Академии наук</journal-id><journal-title-group><journal-title xml:lang="en">Доклады Академии наук</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Академии наук</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-5652</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">12809</article-id><article-id pub-id-type="doi">10.31857/S0869-5652485133-37</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Astronomy, Astrophysics, Cosmology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Астрономия, астрофизика, космология</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Variations of cosmogenic radionuclide production rates in chondrites of known orbits</article-title><trans-title-group xml:lang="ru"><trans-title>Вариации скоростей образования космогенных радионуклидов в хондритах с известными орбитами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ustinova</surname><given-names>G. K.</given-names></name><name xml:lang="ru"><surname>Устинова</surname><given-names>Г. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ustinova@dubna.net.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Alexeev</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Алексеев</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ustinova@dubna.net.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт геохимии и аналитической химии им. В. И. Вернадского Российской Академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-05-19" publication-format="electronic"><day>19</day><month>05</month><year>2019</year></pub-date><volume>485</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>33</fpage><lpage>37</lpage><history><date date-type="received" iso-8601-date="2019-05-22"><day>22</day><month>05</month><year>2019</year></date><date date-type="accepted" iso-8601-date="2019-05-22"><day>22</day><month>05</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Russian academy of sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Российская академия наук</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Russian academy of sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-5652/article/view/12809">https://journals.eco-vector.com/0869-5652/article/view/12809</self-uri><abstract xml:lang="en"><p>The results of multiyear investigations of cosmogenic radionuclide production rates along the orbits of 42 chondrites, fallen successively to the Earth in 1959-2016 are presented. They constitute a long set of homogeneous data, statistical smoothing of which demonstrates some main regularities of distribution and variation of the galactic cosmic rays (GCR) with energy &gt; 100 MeV in the internal (&lt; 5 AU) heliosphere. This set is exclusive, and it has timeless importance for all the future investigations of magneto-hydrodynamic peculiarities of the GCR solar modulation mechanism. Analysis of <sup>26</sup>Al contents in 10 chondrites of known orbits allowed us to educe a spatial profile of the GCR intensity (<italic>E</italic> &gt; 100 MeV), averaged over a 1 My in the internal heliosphere, testifying to permanent development and dissipation of a layer of the solar wind magnetic irregularities, which efficiently modulates cosmic radiation. It suggests a constancy of magneto-hydrodynamic environment in the Solar system at least for the last million years.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены результаты многолетних исследований скоростей образования космогенных радионуклидов вдоль орбит 42 хондритов, последовательно выпадавших на землю в 1959–2016 гг. Анализ содержаний <sup>26</sup>Al в 10 хондритах с известными орбитами позволяет выстроить пространственный профиль средней за миллион лет интенсивности галактических космических лучей (Е &gt; 100 МэВ) на 2–4 а.е. от Солнца, свидетельствующий о постоянном возникновении и диссипации в этой области слоя магнитных неоднородностей солнечного ветра, эффективно модулирующего галактические космические лучи. Это говорит о постоянстве магнитогидродинамической обстановки в Солнечной системе, по крайней мере в течение последнего миллиона лет.</p></trans-abstract><kwd-group xml:lang="en"><kwd>internal heliosphere</kwd><kwd>magneto hydrodynamic processes</kwd><kwd>solar modulation</kwd><kwd>galactic cosmic rays</kwd><kwd>cosmogenic radionuclides</kwd><kwd>meteorites</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>внутренняя гелиосфера</kwd><kwd>магнитогидродинамические процессы</kwd><kwd>солнечная модуляция</kwd><kwd>галактические космические лучи</kwd><kwd>космогенные радионуклиды</kwd><kwd>метеориты</kwd></kwd-group><funding-group><award-group><award-id></award-id></award-group><funding-statement xml:lang="ru">Работа частично поддержана программой № 28 фундаментальных исследований Президиума РАН.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Лаврухина А. К., Устинова Г. К. 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