2045/D - Instytut Fizyki JÄdrowej PAN

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Barbara Obryk rozprawa doktorska - 2 - Pragnę serdecznie podziękować Promotorowi Pawłowi Olko za rady i wskazówki udzielane mi przy pisaniu niniejszej pracy, a także za okazaną wyrozumiałość. Dziękuję również Pawłowi Bilskiemu za dzielenie się ze mną doświadczeniem i wiedzą w trakcie powstawania tej pracy. Serdecznie dziękuję też wszystkim Koleżankom i Kolegom, którzy wspierali moje wysiłki i okazywali pomoc w każdej potrzebie. Szczególnie gorąco dziękuję Edwardowi i Robertowi, za motywowanie mnie i cierpliwość okazywaną na co dzień.
Barbara Obryk rozprawa doktorska - 3 - Development of a method for measurement of high doses of ionizing radiation using highly sensitive LiF:Mg,Cu,P thermoluminescent detectors Abstract One of the well known advantages of thermoluminescence (TL) detectors made of lithium fluoride doped with magnesium, copper and phosphorus (LiF:Mg,Cu,P) is their very high sensitivity to ionizing radiation. LiF:Mg,Cu,P detectors enable measurements of radiation doses from tens of nanograys up to a few kilograys, when the total saturation of the signal of the so-called main dosimetric peak (at about 220°C) occurs. In 2006 for the first time the author observed unprecedented high-temperature emission of LiF detectors heated to temperatures up to 600°C, after exposures to radiation doses ranging from 1 kGy to 1 MGy. For quantification of the glow curve shape changes of LiF:Mg,Cu,P detectors in this range of doses and determination of the absorbed dose, the high temperature coefficient (UHTR) was defined. This newly established dosimetric method was tested in a range of radiation qualities, such as gamma radiation, electron and proton beams, thermal neutron fields and in high-energy mixed fields around the SPS and PS accelerators at CERN. A number of dosimetric sets with LiF:Mg,Cu,P detectors are currently installed around the LHC at CERN. The new method for ultra-high dose range monitoring with a single LiF:Mg,Cu,P detector, which is capable of covering at least twelve orders of magnitude of doses, can be used for dosimetry at high energy accelerators, thermonuclear fusion technology facilities and has great potential for accident dosimetry in particular.
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2045/D - Instytut Fizyki JÄ drowej PAN

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2045/D - Instytut Fizyki JÄdrowej PAN