{"id":24823,"date":"2022-09-18T15:54:58","date_gmt":"2022-09-18T15:54:58","guid":{"rendered":"https:\/\/www.africa-press.net\/mali\/politique\/les-oscillations-de-neutrinos"},"modified":"2022-09-18T17:27:14","modified_gmt":"2022-09-18T17:27:14","slug":"les-oscillations-de-neutrinos","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos","title":{"rendered":"Les oscillations de neutrinos"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Mali. <\/strong><\/span>Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existence exp\u00e9rimentale n\u2019a \u00e9t\u00e9 prouv\u00e9e qu\u2019un quart de si\u00e8cle plus tard. Depuis, le neutrino occupe la sc\u00e8ne avec ses nombreuses \u00e9nigmes, or la d\u00e9tection, et donc la v\u00e9rification des pr\u00e9dictions, en est particuli\u00e8rement ardue. Cela n\u00e9cessite des d\u00e9tecteurs tr\u00e8s massifs. L\u2019ultime probl\u00e8me r\u00e9solu est celui de la masse des neutrinos : ont-ils ou n\u2019ont-ils pas de masse ? Voyons comment la r\u00e9ponse est arriv\u00e9e.<\/p>\n<p>En 1930, Pauli Wolfgang, physicien suisse d\u2019origine autrichienne, postula l\u2019existence d\u2019une particule sans masse et sans charge \u00e9lectrique. Sa pr\u00e9diction fut confirm\u00e9e en 1956 par la d\u00e9couverte du neutrino. Pour d\u00e9celer l\u2019existence de neutrinos il faut des d\u00e9tecteurs tr\u00e8s massifs, par exemple le Super-Kamiokande.<\/p>\n<p>Le Super-Kamiokande (Super-K), dispositif g\u00e9ant situ\u00e9 dans une vaste caverne sous une montagne \u00e0 l\u2019ouest de Tokyo, est constitu\u00e9 d\u2019une immense enceinte de 50 kilotonnes d\u2019eau purifi\u00e9e, aussi volumineuse qu\u2019un immeuble de 15 \u00e9tages de haut et pesant sept fois le poids de la Tour Eiffel.<\/p>\n<p>Quand un neutrino interagit avec une mol\u00e9cule d\u2019eau, une lumi\u00e8re est cr\u00e9\u00e9e qui est d\u00e9tect\u00e9e par un ensemble de 11.000 capteurs appel\u00e9s tubes photomultiplicateurs. C\u2019est en analysant cette lumi\u00e8re que l\u2019on remonte \u00e0 la cause, c\u2019est-\u00e0-dire au neutrino responsable.<\/p>\n<p>La chasse aux neutrinos apporte des r\u00e9ponses<\/p>\n<p>Ainsi les neutrinos ont r\u00e9v\u00e9l\u00e9 certains de leurs myst\u00e8res. L\u2019ultime probl\u00e8me r\u00e9solu est celui de la masse des neutrinos : ont-ils ou n\u2019ont-ils pas de masse ? Voyons comment la r\u00e9ponse est arriv\u00e9e.<\/p>\n<p>Dans ce dossier, vous pourrez d\u00e9couvrir le ph\u00e9nom\u00e8ne d\u2019oscillations, les neutrinos solaires, les neutrinos atmosph\u00e9riques et la masse des neutrinos.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/mali\">Mali<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Mali. Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existence exp\u00e9rimentale n\u2019a \u00e9t\u00e9 prouv\u00e9e qu\u2019un quart de si\u00e8cle plus tard. Depuis, le neutrino occupe la sc\u00e8ne avec ses nombreuses \u00e9nigmes, or la d\u00e9tection, et donc la v\u00e9rification des pr\u00e9dictions, en est particuli\u00e8rement [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":24822,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,11,17],"tags":[76,86,19],"class_list":["post-24823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-mali","tag-mali"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Les oscillations de neutrinos - Mali<\/title>\n<meta name=\"description\" content=\"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les oscillations de neutrinos\" \/>\n<meta property=\"og:description\" content=\"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\" \/>\n<meta property=\"og:site_name\" content=\"Mali\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AfricaPressTunisiaa\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-18T15:54:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-18T17:27:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1520\" \/>\n\t<meta property=\"og:image:height\" content=\"791\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Les oscillations de neutrinos\",\"datePublished\":\"2022-09-18T15:54:58+00:00\",\"dateModified\":\"2022-09-18T17:27:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\"},\"wordCount\":343,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Mali\",\"mali\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\",\"url\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\",\"name\":\"Les oscillations de neutrinos - Mali\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg\",\"datePublished\":\"2022-09-18T15:54:58+00:00\",\"dateModified\":\"2022-09-18T17:27:14+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg\",\"width\":1520,\"height\":791,\"caption\":\"Les oscillations de neutrinos\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.africa-press.net\/mali\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Les oscillations de neutrinos\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#website\",\"url\":\"https:\/\/www.africa-press.net\/mali\/\",\"name\":\"Mali\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/mali\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Les oscillations de neutrinos - Mali","description":"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos","og_locale":"fr_FR","og_type":"article","og_title":"Les oscillations de neutrinos","og_description":"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...","og_url":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos","og_site_name":"Mali","article_publisher":"https:\/\/www.facebook.com\/AfricaPressTunisiaa","article_published_time":"2022-09-18T15:54:58+00:00","article_modified_time":"2022-09-18T17:27:14+00:00","og_image":[{"width":1520,"height":791,"url":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Les oscillations de neutrinos","datePublished":"2022-09-18T15:54:58+00:00","dateModified":"2022-09-18T17:27:14+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos"},"wordCount":343,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg","keywords":["Africa Press","Africa Press-Mali","mali"],"articleSection":["Divers","homepage-french","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos","url":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos","name":"Les oscillations de neutrinos - Mali","isPartOf":{"@id":"https:\/\/www.africa-press.net\/mali\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg","datePublished":"2022-09-18T15:54:58+00:00","dateModified":"2022-09-18T17:27:14+00:00","author":{"@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Le neutrino a \u00e9t\u00e9 postul\u00e9 en 1930 pour r\u00e9soudre un probl\u00e8me majeur en physique : la conservation d\u2019\u00e9nergie. Son existenc ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#primaryimage","url":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg","contentUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_12-632754d8b2119.jpg","width":1520,"height":791,"caption":"Les oscillations de neutrinos"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/les-oscillations-de-neutrinos#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.africa-press.net\/mali\/"},{"@type":"ListItem","position":2,"name":"Les oscillations de neutrinos"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/mali\/#website","url":"https:\/\/www.africa-press.net\/mali\/","name":"Mali","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/mali\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts\/24823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/comments?post=24823"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts\/24823\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/media\/24822"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/media?parent=24823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/categories?post=24823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/tags?post=24823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}