{"id":383518,"date":"2026-08-17T20:08:23","date_gmt":"2026-08-17T20:08:23","guid":{"rendered":"http:\/\/6a834821349919102aeda0a4"},"modified":"2026-08-17T20:08:23","modified_gmt":"2026-08-17T20:08:23","slug":"asi-son-las-trampas-experimentales-para-cazar-a-los-fantasmagoricos-neutrinos","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=383518","title":{"rendered":"As\u00ed son las \u00abtrampas\u00bb experimentales para cazar a los fantasmag\u00f3ricos neutrinos"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/media.es.wired.com\/photos\/6a834a719669b824b9679107\/16:9\/w_1280,c_limit\/Dry-cleaning-fluid-for-Homestake-neutrino-detector-cr-Brookhaven-National-LaboratoryScience-Photo-Library-scaled.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p><em>La versi\u00f3n original de este <a href=\"https:\/\/www.quantamagazine.org\/how-physicists-track-and-trap-the-elusive-neutrino-20260624\/\">art\u00edculo<\/a> apareci\u00f3 en la<\/em> revista <em><a href=\"https:\/\/www.quantamagazine.org\/\" target=\"_blank\">Quanta Magazine<\/a>.<\/em><\/p>\n<p>Hace setenta a\u00f1os, los f\u00edsicos Clyde Cowan y Frederick Reines tomaron un detector de 10 toneladas fabricado a medida, lo rodearon con gruesas paredes de plomo y sacos de arena h\u00famedos, y lo colocaron cerca de un potente reactor nuclear en la planta de Savannah River en Carolina del Sur. Llamaron al experimento \u00abProyecto Poltergeist\u00bb, ya que estaba dise\u00f1ado para atrapar un fantasma.<\/p>\n<p>M\u00e1s de un cuarto de siglo antes, los f\u00edsicos se preguntaban por qu\u00e9 parec\u00eda perderse energ\u00eda durante un proceso radiactivo llamado desintegraci\u00f3n beta. Algo faltaba, y no exist\u00eda una explicaci\u00f3n f\u00edsica conocida para ello. Entonces, en 1930, el f\u00edsico austriaco Wolfgang Pauli propuso una soluci\u00f3n radical: una part\u00edcula pr\u00e1cticamente indetectable se llevaba silenciosamente la energ\u00eda faltante. \u00abHe hecho algo terrible. He postulado una part\u00edcula que no se puede detectar\u00bb, le dijo Pauli a un amigo. Esta part\u00edcula se conocer\u00eda como neutrino. Al no tener casi masa ni carga, estas part\u00edculas pueden atravesar <a href=\"https:\/\/es.wired.com\/articulos\/esa-es-la-verdadera-forma-de-la-tierra-la-nasa-compartio-un-nuevo-modelo-3d-del-geoide-y-la-gente-esta-algo-asustada\">la Tierra<\/a> y todo lo que hay en ella, incluidos nuestros cuerpos, pr\u00e1cticamente sin impedimentos.<\/p>\n<p>El enorme dispositivo que Cowan y Reines desplegaron a principios de 1956 ten\u00eda como objetivo encontrar lo que Pauli consideraba imposible. Ese junio, los dos f\u00edsicos del Laboratorio Nacional de Los Alamos enviaron un telegrama a Pauli: \u00abNos complace informarles que hemos detectado neutrinos\u00bb.<\/p>\n<p>La atenci\u00f3n se centr\u00f3 entonces en una cuesti\u00f3n m\u00e1s amplia. Si las reacciones nucleares producen neutrinos, \u00bfpodr\u00edamos utilizarlos para observar los fuegos artificiales nucleares en el interior de las estrellas, incluido <a href=\"https:\/\/es.wired.com\/articulos\/la-ia-ya-esta-aprendiendo-a-leer-el-sol-para-mejorar-la-prediccion-del-clima-espacial\">el Sol<\/a>? Esto planteaba un enorme desaf\u00edo: \u00bfC\u00f3mo es posible detectar part\u00edculas provenientes de estrellas distantes si estas pueden atravesar casi cualquier cosa sin ser detectadas? Se sospechaba que detectar una part\u00edcula que rara vez colisiona con la materia requiere una enorme cantidad de la misma con la que colisionar. Adem\u00e1s, la materia tendr\u00eda que estar protegida de otras formas de radiaci\u00f3n. As\u00ed pues, la soluci\u00f3n que encontraron los cient\u00edficos fue construir algunas de las trampas experimentales m\u00e1s grandes, profundas y sofisticadas de la historia de la ciencia\u2026 y luego esperar.<\/p>\n<p>En la d\u00e9cada de 1960, Raymond Davis Jr. y sus colegas del Laboratorio Nacional de Brookhaven colocaron un tanque a 1.5 kil\u00f3metros bajo tierra en la mina Homestake, en Dakota del Sur, y lo llenaron con casi 400,000 litros de un fluido de limpieza a base de cloro llamado percloroetileno. En las raras ocasiones en que un neutrino que pasaba cerca impactaba contra un n\u00facleo de cloro, se transformaba en una forma radiactiva de arg\u00f3n que pod\u00eda detectarse y cuantificarse. El experimento, que dur\u00f3 25 a\u00f1os, hall\u00f3 apenas un tercio del n\u00famero de neutrinos provenientes del Sol que se hab\u00eda predicho en los modelos te\u00f3ricos. Esto se conoci\u00f3 como el problema de los neutrinos solares.<\/p>\n<p>Pasaron d\u00e9cadas antes de que se resolviera, gracias a experimentos a\u00fan m\u00e1s complejos. En las profundidades de la mina Kamioka, en Jap\u00f3n, Masatoshi Koshiba construy\u00f3 un detector diferente llamado Kamiokande, que utilizaba 3 millones de litros de agua ultrapura. En este sistema, los neutrinos interact\u00faan ocasionalmente con los n\u00facleos at\u00f3micos del agua. Esta interacci\u00f3n crea un electr\u00f3n que se mueve tan r\u00e1pido que genera un destello de lo que se conoce como luz Cherenkov. Esta luz es captada por detectores.<\/p>\n<p>Kamiokande y Koshiba confirmaron la deficiencia de Davis, y un segundo detector, a\u00fan m\u00e1s grande, el Super-Kamiokande, as\u00ed como el Observatorio de Neutrinos de Sudbury en Canad\u00e1, explicaron la discrepancia. Los neutrinos se presentan en tres \u00absabores\u00bb diferentes (electr\u00f3n, mu\u00f3n y tau) y pueden oscilar, o cambiar, entre ellos. Para ello, los neutrinos deben tener masa, algo que las leyes de la f\u00edsica no lograron predecir. Los sabores son una forma de referirse a tipos o variedades de una misma part\u00edcula.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La versi\u00f3n original de este art\u00edculo apareci\u00f3&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":383519,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-383518","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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