{"id":28650,"date":"2024-03-29T20:08:46","date_gmt":"2024-03-29T19:08:46","guid":{"rendered":"https:\/\/www.carlessuria.com\/radiacions\/radioactivitat\/"},"modified":"2024-08-23T12:55:48","modified_gmt":"2024-08-23T11:55:48","slug":"mesurar-radioactivitat","status":"publish","type":"page","link":"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-radioactivitat\/","title":{"rendered":"RADIOACTIVITAT"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"28650\" class=\"elementor elementor-28650 elementor-5879\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d746fa3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d746fa3\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-36c7b69\" data-id=\"36c7b69\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44fdf92 elementor-widget elementor-widget-heading\" data-id=\"44fdf92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">RADIOACTIVITAT<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06fb6a2 elementor-widget elementor-widget-text-editor\" data-id=\"06fb6a2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>El ser hum\u00e0 des de sempre ha estat exposat a fonts naturals de radioactivitat, com el subs\u00f2l, l&#8217;aigua o el gas rad\u00f3. M\u00e9s recentment s&#8217;hi han afegit fonts artificials procedents de proves at\u00f2miques, alguns dispositius m\u00e8dics i tamb\u00e9 materials de construcci\u00f3.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f96c45 elementor-widget elementor-widget-heading\" data-id=\"3f96c45\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">QU\u00c8 \u00c9S LA RADIOACTIVITAT<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6fef3f elementor-widget elementor-widget-text-editor\" data-id=\"d6fef3f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La radiaci\u00f3 ionitzant o la radioactivitat \u00e9s un fenomen f\u00edsic d&#8217;alguns elements que es desintegren de forma espont\u00e0nia en elements m\u00e9s estables. En aquest proc\u00e9s emeten part\u00edcules d&#8217;alta energia (alfa, beta, gamma, X i neutrons) que tenen la propietat de travessar cossos opacs o ionitzar gasos.<\/p><p>A la llar, els mesuraments de radioactivitat m\u00e9s importants corresponen a la radiaci\u00f3 gamma i al gas rad\u00f3, com a font de radiaci\u00f3 alfa.<\/p><p>La radiaci\u00f3 gamma presenta un nivell energ\u00e8tic alt i \u00e9s molt penetrant al cos hum\u00e0. El greu dany que genera a les c\u00e8l\u00b7lules \u00e9s utilitzat en la medicina i l&#8217;alimentaci\u00f3 per esterilitzar, \u00e9s a dir, per eliminar els bacteris.<\/p><p>La radiaci\u00f3 alfa presenta un poder energ\u00e8tic m\u00e9s gran que la radiaci\u00f3 gamma, per\u00f2 \u00e9s menys penetrant. No obstant aix\u00f2, sol penetrar a l&#8217;organisme a partir de la respiraci\u00f3 de gas rad\u00f3.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17cdfa6 elementor-widget elementor-widget-image\" data-id=\"17cdfa6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"370\" src=\"https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/granito-1030x477.jpg\" class=\"attachment-large size-large wp-image-36032\" alt=\"Granit\" srcset=\"https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/granito-1030x477.jpg 1030w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/granito-300x139.jpg 300w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/granito-768x356.jpg 768w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/granito.jpg 1080w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-601cbbd elementor-widget elementor-widget-heading\" data-id=\"601cbbd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">EFECTES A LA SALUT<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-795bbfa elementor-widget elementor-widget-text-editor\" data-id=\"795bbfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L&#8217;efecte ionitzant proporciona prou energia per arrencar electrons dels \u00e0toms de les c\u00e8l\u00b7lules del cos hum\u00e0. Es poden produir reaccions qu\u00edmiques no desitjades que generin alteracions als cromosomes i les membranes de les c\u00e8l\u00b7lules. La posterior fragmentaci\u00f3 i reproducci\u00f3 d&#8217;aquestes c\u00e8l\u00b7lules pot estendre aquestes alteracions al material gen\u00e8tic (ADN).<\/p><p>Els efectes negatius que causa la radioactivitat als \u00f2rgans i teixits depenen de la dosi rebuda o absorbida, el tipus de radioactivitat i de la sensibilitat dels diferents \u00f2rgans i teixits.<\/p><p>Dosis baixes de radiaci\u00f3 ionitzant cont\u00ednues amb el temps s\u00f3n suficients per a augmentar el risc defectes a llarg termini, com ara el c\u00e0ncer o danys cerebrals al fetus. Aquest fenomen \u00e9s conegut com a efecte Petkau i per aquest motiu s&#8217;aconsella evitar amb la mesura del possible elements radioactius a la llar, encara que siguin de baixa emissi\u00f3.<\/p><p>L&#8217;Organitzaci\u00f3 Mundial de la Salut qualifica la radioactivitat com a <a href=\"http:\/\/www.who.int\/mediacentre\/factsheets\/fs371\/es\/\">cancerigen<\/a> pels greus danys que genera a la pell i els \u00f2rgans del cos hum\u00e0.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c15701 elementor-widget elementor-widget-heading\" data-id=\"2c15701\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">MATERIALS DE CONSTRUCCI\u00d3<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b92eee elementor-widget elementor-widget-text-editor\" data-id=\"9b92eee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Els materials de construcci\u00f3 poden sotmetre les persones que habiten o treballen als edificis a unes dosis m\u00e9s grans de radiacions de les que rebria en un entorn natural. Conv\u00e9 evitar els materials radioactius en la mesura que sigui possible, a fi d&#8217;evitar efectes a llarg termini.<\/p><p>En general els materials de construcci\u00f3 que utilitzen residus o b\u00e9 pedres de formaci\u00f3 m\u00e9s recent com les pedres volc\u00e0niques contenen m\u00e9s elements radioactius, com el tori-232, el radi-226 i el potassi-40. Entre aquests elements podem trobar <strong>el granit, el basalt o formigons als quals s&#8217;hi hagin afegit cendres volants<\/strong>.<\/p><p>D&#8217;altra banda, materials de proced\u00e8ncia org\u00e0nica com la fusta, o derivats de pedres sediment\u00e0ries com el guix natural o la sorra de pedra calc\u00e0ria proporcionen valors de radioactivitat baixos.<\/p><p>Aix\u00ed doncs, la mat\u00e8ria primera utilitzada \u00e9s el principal factor que determina la radioactivitat dels materials de construcci\u00f3 com ara els maons o les rajoles.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab65f3f elementor-widget elementor-widget-image\" data-id=\"ab65f3f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"444\" src=\"https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/cocina-granito-1030x572.jpg\" class=\"attachment-large size-large wp-image-36036\" alt=\"granit en cuina. Font de radioactivitat\" srcset=\"https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/cocina-granito-1030x572.jpg 1030w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/cocina-granito-300x167.jpg 300w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/cocina-granito-768x427.jpg 768w, https:\/\/www.carlessuria.com\/wp-content\/uploads\/2024\/08\/cocina-granito.jpg 1080w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-526b955 elementor-widget elementor-widget-heading\" data-id=\"526b955\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">MESURAR LA RADIOACTIVITAT<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-301d493 elementor-widget elementor-widget-text-editor\" data-id=\"301d493\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>El mesurament de la radioactivitat inclou mesurar la taxa d&#8217;impulsos, aix\u00ed com el mesurament i el registre de la concentraci\u00f3 de <a href=\"https:\/\/www.carlessuria.com\/ca\/toxics\/mesurar-gas-rado\/\">gas rad\u00f3<\/a>.<\/p><p>Es mesuren els impulsos radioactius de materials de construcci\u00f3, aparells i instal\u00b7lacions sospitoses de radioactivitat. Poden utilitzar-se diferents aparells de mesura, sent els m\u00e9s habituals el tub comptador Geiger-M\u00fcller o el comptador de centelleig.<\/p><p>En bioconstrucci\u00f3 es considera que a l&#8217;interior de l&#8217;habitatge els valors mesurats de radioactivitat n ohaurien de superar els valors obtinguts al medi natural local.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d78f533 elementor-widget elementor-widget-video\" data-id=\"d78f533\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/sniYt9wOZf8&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-a65c8d5\" data-id=\"a65c8d5\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7748333 elementor-widget elementor-widget-template\" data-id=\"7748333\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"29104\" class=\"elementor elementor-29104 elementor-26013 elementor-26013\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-966859d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"966859d\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-803c458\" data-id=\"803c458\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1d15f61 elementor-nav-menu__align-start elementor-nav-menu--dropdown-none elementor-widget elementor-widget-nav-menu\" data-id=\"1d15f61\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;vertical&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;i class=\\&quot;fas fa-caret-down\\&quot; aria-hidden=\\&quot;true\\&quot;&gt;&lt;\\\/i&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;}}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Menu\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-vertical e--pointer-none\">\n\t\t\t\t<ul id=\"menu-1-1d15f61\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28987\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/\" class=\"elementor-item\">RADIACIONS<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28988\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-ones-electromagnetiques\/\" class=\"elementor-item\">ONES ELECTROMAGN\u00c8TIQUES<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28991\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-camp-magnetic-electric\/\" class=\"elementor-item\">CAMPS MAGN\u00c8TICS I EL\u00c8CTRICS<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28992\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-radioactivitat\/\" class=\"elementor-item\">RADIOACTIVITAT<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-1d15f61\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28987\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/\" class=\"elementor-item\" tabindex=\"-1\">RADIACIONS<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28988\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-ones-electromagnetiques\/\" class=\"elementor-item\" tabindex=\"-1\">ONES ELECTROMAGN\u00c8TIQUES<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28991\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-camp-magnetic-electric\/\" class=\"elementor-item\" tabindex=\"-1\">CAMPS MAGN\u00c8TICS I EL\u00c8CTRICS<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28992\"><a href=\"https:\/\/www.carlessuria.com\/ca\/radiacions\/mesurar-radioactivitat\/\" class=\"elementor-item\" tabindex=\"-1\">RADIOACTIVITAT<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4b2fe9 elementor-widget elementor-widget-heading\" data-id=\"d4b2fe9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">T'INTERESSA UN MESURAMENT DE CONTAMINACI\u00d3 ELECTROMAGN\u00c8TICA?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e6249a elementor-align-center elementor-widget elementor-widget-button\" data-id=\"1e6249a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/www.carlessuria.com\/ca\/mesurament-de-camps-electromagnetics\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Mesurament de camps electromagn\u00e8tics<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>RADIOACTIVITAT El ser hum\u00e0 des de sempre ha estat exposat a fonts naturals de radioactivitat, com el subs\u00f2l, l&#8217;aigua o el gas rad\u00f3. M\u00e9s recentment s&#8217;hi han afegit fonts artificials procedents de proves at\u00f2miques, alguns dispositius m\u00e8dics i tamb\u00e9 materials de construcci\u00f3. QU\u00c8 \u00c9S LA RADIOACTIVITAT La radiaci\u00f3 ionitzant o la radioactivitat \u00e9s un fenomen [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":28628,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"content-type":"","h5ap_radio_sources":[],"footnotes":""},"class_list":["post-28650","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Medici\u00f3 de radioactivitat experta - Materials, granit<\/title>\n<meta name=\"description\" content=\"Els materials de construcci\u00f3 i decoraci\u00f3 com el granit o el formig\u00f3 poden ser radioactius. 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