{"id":678,"date":"2023-10-10T11:20:44","date_gmt":"2023-10-10T10:20:44","guid":{"rendered":"https:\/\/www.ujfi.fei.stuba.sk\/wordpress\/?p=678"},"modified":"2024-01-23T09:33:55","modified_gmt":"2024-01-23T08:33:55","slug":"aktualny-vyskum-1","status":"publish","type":"post","link":"https:\/\/ujfi.fei.stuba.sk\/en\/aktualny-vyskum-1\/","title":{"rendered":"Detektory latentn\u00fdch st\u00f4p v\u00a0pevnej f\u00e1ze"},"content":{"rendered":"\n

Detektory latentn\u00fdch st\u00f4p v\u00a0pevnej f\u00e1ze (SSNTD, z ang. solid-state nuclear track detector) sl\u00fa\u017eia na pas\u00edvnu detekciu ionizuj\u00faceho \u017eiarenia. SSNTD s\u00fa vhodn\u00e9 pre detekciu \u0165a\u017ek\u00fdch nabit\u00fdch \u010dast\u00edc, ako s\u00fa prot\u00f3ny, alfa \u010dastice a \u010fal\u0161ie, pr\u00edpadne pre detekciu r\u00fdchlych neutr\u00f3nov. Ako materi\u00e1l detektora m\u00f4\u017eu by\u0165 vyu\u017eit\u00e9 miner\u00e1ly, sklo alebo plasty, v s\u00fa\u010dasnosti je najviac vyu\u017e\u00edvan\u00fdm materi\u00e1lom polym\u00e9r poly-allyl diglykol carbonate (PADC), zn\u00e1my aj pod obchodnou zna\u010dkou CR-39. Tento materi\u00e1l je v\u010faka vysok\u00e9mu obsahu at\u00f3mov vod\u00edka vhodn\u00fd mimo in\u00e9 aj na detekciu r\u00fdchlych neutr\u00f3nov. Princ\u00edp fungovania je zalo\u017een\u00fd na odovzd\u00e1van\u00ed energie dopadaj\u00facej \u010dastice materi\u00e1lu detektora. \u0164a\u017ek\u00e1 nabit\u00e1 \u010dastica pri dopade na povrch detektora sp\u00f4sobuje zmeny v \u0161trukt\u00fare materi\u00e1lu pozd\u013a\u017e svojej dr\u00e1hy a vznik\u00e1 tzv. latentn\u00e1 stopa o ve\u013ekosti v r\u00e1de nanometrov. N\u00e1sledne je stopa zv\u00e4\u010d\u0161en\u00e1 chemick\u00fdm leptan\u00edm na ve\u013ekos\u0165 v r\u00e1de desiatok mikrometrov. Vyleptan\u00e9 stopy a\u00a0ich po\u010det je mo\u017en\u00e9 pozorova\u0165 pod optick\u00fdm mikroskopom. Medzi v\u00fdhody PADC detektorov patr\u00ed napr\u00edklad kompaktnos\u0165, mo\u017enos\u0165 dlhodob\u00e9ho merania (aj nieko\u013eko mesiacov), line\u00e1rna odozva pri meran\u00ed r\u00fdchlych neutr\u00f3nov a n\u00edzka cena. SSNTD z PADC materi\u00e1lu s\u00fa celosvetovo vyu\u017e\u00edvan\u00e9 na meranie koncentr\u00e1cie rad\u00f3nu, v\u010faka mo\u017enosti dlhodob\u00e9ho zhroma\u017e\u010fovania sign\u00e1lu od alfa \u017eiarenia. \u010ealej s\u00fa tieto detektory vyu\u017e\u00edvan\u00e9 v osobnej dozimetrii, alebo napr\u00edklad pri ur\u010dovan\u00ed parametrov zv\u00e4zkov \u010dast\u00edc pre r\u00e1diobiologick\u00e9 \u00fa\u010dely. Na\u0161a skupina vyu\u017e\u00edva PADC detektory typu TASTRAK, v spojen\u00ed so syst\u00e9mom na leptanie a anal\u00fdzu od v\u00fdrobcu Track Analysis Systems Ltd. [1]. Syst\u00e9m pozost\u00e1va z\u00a0termostatickej leptacej vane, sady dr\u017eiakov z nerezovej ocele, a mikroskopu, prepojen\u00e9ho cez CCD kameru k po\u010d\u00edta\u010du so softv\u00e9rom TASLImage, ktor\u00fd sl\u00fa\u017ei k vyhodnocovaniu meran\u00e9ho sign\u00e1lu. Prv\u00e9 experimenty na\u0161ej skupiny boli zameran\u00e9 na overenie vlastnost\u00ed detektorov TASTRAK pri meran\u00ed r\u00fdchlych neutr\u00f3nov z PuBe neutr\u00f3nov\u00e9ho zdroja [2], na overenie vplyvov prostredia na odozvu syst\u00e9mu, alebo na sk\u00famanie parametrov leptania. V s\u00fa\u010dasnosti sa venujeme mimo in\u00e9ho meraniu priestorov\u00e9ho rozlo\u017eenia r\u00fdchlych neutr\u00f3nov v okol\u00ed neutr\u00f3nov\u00fdch zdrojov, alebo overeniu odozvy pri pou\u017eit\u00ed r\u00f4znych radi\u00e1torov (napr. PE) a degrad\u00e9rov (napr. hlin\u00edk). Na\u0161a skupina sa tie\u017e zapojila do experimentov, zameran\u00fdch na zlep\u0161ovanie kvality PADC materi\u00e1lu, v r\u00e1mci zdru\u017eenia EURADOS. \u010eal\u0161ou oblas\u0165ou, ktorej sa na\u0161a skupina venuje, je meranie koncentr\u00e1cie rad\u00f3nu. Prebiehaj\u00fa aj kalibra\u010dn\u00e9 merania v rad\u00f3novej komore v spolupr\u00e1ci so slovensk\u00fdm metrologick\u00fdm \u00fastavom [3].<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

Obr\u00e1zok 1: Povrch detektora TASTRAK po meran\u00ed r\u00fdchlych neutr\u00f3nov zo zdroja neutr\u00f3nov PuBe (v\u013eavo) a mikroskop pripojen\u00fd CCD kamerou k PC s vyhodnocovac\u00edm softv\u00e9rom TASLImage (vpravo).<\/p>\n\n\n\n

Literat\u00fara<\/p>\n\n\n\n

[1] TRACK ANALYSIS SYSTEMS LTD. [online]. [cit. 2023-11-29]. Dostupn\u00e9 na internete: https:\/\/www.tasl.co.uk\/<\/p>\n\n\n\n

[2] FILOV\u00c1, Vendula, Branislav VRBAN, Pavol BLAHU\u0160IAK, Jakub L\u00dcLEY, \u0160tefan \u010cERBA a Vladim\u00edr NE\u010cAS. The acceptance testing of PADC detectors for fast neutron dosimetry using PuBe neutron source.\u00a0Radiation Physics and Chemistry<\/em>\u00a0[online]. 2023,\u00a0212\u00a0[cit. 2024-1-22]. DOI: 10.1016\/j.radphyschem.2023.111181. ISSN 0969806X.<\/p>\n\n\n\n

[3] L\u00dcLEY, J., V. FILOVA, P. BLAHU\u0160IAK, B. VRBAN, \u0160. \u010cERBA, I. BONKOV\u00c1 a V. NE\u010cAS. CR-39 detector-based Radon dosimetry system calibration in the self-decay mode.\u00a0The European Physical Journal Special Topics<\/em>\u00a0[online]. 2023,\u00a0232(10), 1493-1500 [cit. 2024-1-12]. DOI: 10.1140\/epjs\/s11734-023-00876-8. ISSN 1951-6355.<\/p>\n","protected":false},"excerpt":{"rendered":"

Detektory latentn\u00fdch st\u00f4p v\u00a0pevnej f\u00e1ze (SSNTD, z ang. solid-state nuclear track detector) sl\u00fa\u017eia na pas\u00edvnu detekciu ionizuj\u00faceho \u017eiarenia. SSNTD s\u00fa vhodn\u00e9 pre detekciu \u0165a\u017ek\u00fdch nabit\u00fdch \u010dast\u00edc, ako s\u00fa prot\u00f3ny, alfa \u010dastice a \u010fal\u0161ie, pr\u00edpadne pre detekciu r\u00fdchlych neutr\u00f3nov. Ako materi\u00e1l detektora m\u00f4\u017eu by\u0165 vyu\u017eit\u00e9 miner\u00e1ly, sklo alebo plasty, v s\u00fa\u010dasnosti je najviac vyu\u017e\u00edvan\u00fdm materi\u00e1lom polym\u00e9r poly-allyl diglykol carbonate (PADC), zn\u00e1my aj pod obchodnou zna\u010dkou CR-39. Tento materi\u00e1l je v\u010faka vysok\u00e9mu obsahu at\u00f3mov vod\u00edka vhodn\u00fd mimo in\u00e9 aj na detekciu r\u00fdchlych neutr\u00f3nov. Princ\u00edp fungovania je zalo\u017een\u00fd na odovzd\u00e1van\u00ed energie dopadaj\u00facej \u010dastice materi\u00e1lu detektora. \u0164a\u017ek\u00e1 nabit\u00e1 \u010dastica pri dopade na povrch detektora… <\/p>\n","protected":false},"author":1,"featured_media":959,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-678","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jadrova-technika-a-energetika"],"_links":{"self":[{"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/posts\/678","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/comments?post=678"}],"version-history":[{"count":0,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/posts\/678\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/media\/959"}],"wp:attachment":[{"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/media?parent=678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/categories?post=678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ujfi.fei.stuba.sk\/en\/wp-json\/wp\/v2\/tags?post=678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}