{"id":20681,"date":"2022-11-14T19:10:26","date_gmt":"2022-11-14T16:10:26","guid":{"rendered":"http:\/\/www.inasan.ru\/?p=20681"},"modified":"2022-11-18T19:48:02","modified_gmt":"2022-11-18T16:48:02","slug":"16112022","status":"publish","type":"post","link":"http:\/\/www.inasan.ru\/en\/16112022\/","title":{"rendered":"\u0421\u0435\u043c\u0438\u043d\u0430\u0440 \u201c\u041c\u0430\u043b\u044b\u0435 \u0442\u0435\u043b\u0430 \u0421\u043e\u043b\u043d\u0435\u0447\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b\u201d (16 \u043d\u043e\u044f\u0431\u0440\u044f 2022, 15:00)"},"content":{"rendered":"<div>Belousov D.V.<\/div>\n<div>Ioffe Physical-Technical Institute of the RAS, St. Petersburg<\/div>\n<div>Simulation of energy accumulation in icy bodies during irradiation: a source<\/div>\n<div>of cometary activity far from the Sun.<\/div>\n<div>Abstract<\/div>\n<div>Many icy bodies in the solar system (e.g., comets and Kuiper Belt objects)<\/div>\n<div>demonstrate activity far from the Sun. The nature of such an activity remains one<\/div>\n<div>of the main enigmas of planetology. Comet nuclei undergo a constant<\/div>\n<div>bombardment by galactic cosmic rays (GCR) and solar cosmic rays (SCR) during<\/div>\n<div>their storage in the Oort Cloud and the Kuiper Belt. Long-term cosmic ray<\/div>\n<div>irradiation produces chemical and physical changes in comet ice with the<\/div>\n<div>formation of radicals. It is well-known that trapped radicals at low temperatures are<\/div>\n<div>prone to fast recombination with marked energy release; recombination can be<\/div>\n<div>induced by external heating or occurs spontaneously reaching the critical<\/div>\n<div>concentration of radicals. A similar process could take place in the radicals-<\/div>\n<div>enriched subsurface layer during the sunward voyage of a dynamically \u201cnew\u201d<\/div>\n<div>comet. Also, located in the Oort Cloud cometary nuclei can experience activity<\/div>\n<div>\n<p>driven by spontaneous recombination.<\/p>\n<div>Several experiments on ice irradiation have been conducted to examine radicals<\/div>\n<div>accumulation in proton-irradiated and electron-irradiated ice at 80 K. Based on<\/div>\n<div>experimental data, we have developed the model of comet activity at large<\/div>\n<div>heliocentric distances triggered by accumulated radicals. GCR influences only the<\/div>\n<div>upper 10-meter layer of a comet, while much deeper layers are irradiated by decay<\/div>\n<div>of radionuclides. As a results, comets in the Oort Cloud and the Kuiper Belt can<\/div>\n<div>have a high concentration of radicals and be active at large distances.<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Belousov D.V. Ioffe Physical-Technical Institute of the RAS, St. Petersburg Simulation of energy accumulation in icy bodies during irradiation: a source of cometary activity far from the Sun. Abstract Many icy bodies in the solar system (e.g., comets and Kuiper Belt objects) demonstrate activity far from the Sun. The nature of such an activity remains<\/p>\n<div class=\"read-more\"><a href=\"http:\/\/www.inasan.ru\/en\/16112022\/\">Continue Reading&rsaquo;&rsaquo;<\/a><\/div>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-20681","post","type-post","status-publish","format-standard","hentry","category-akoseminar"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"en","enabled_languages":["ru","en"],"languages":{"ru":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/20681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/comments?post=20681"}],"version-history":[{"count":4,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/20681\/revisions"}],"predecessor-version":[{"id":20683,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/20681\/revisions\/20683"}],"wp:attachment":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/media?parent=20681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/categories?post=20681"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/tags?post=20681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}