Naslov
Intercomparison of dosimetry systems based on CaF2:Mn TL detectors

Autori
Zorko, Benjamin ; Štuhec, Matjaž ; Gobec, Sandi ; Miljanić, Saveta ; Vekić, Branko ; Ranogajec-Komor, Maria

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
14th International Solid State Dosimetry Conference : book of abstracts / - New Haven (CT), 2004, 98-98

Skup
14th International Solid State Dosimetry Conference

Mjesto i datum
New Haven (CT), Sjedinjene Američke Države, 27.06.2004. - 02.07.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
TL detectors; CaF2:Mn; intercomparison; TL reader

Sažetak
The aim of the present work was to compare the dosimetry systems based on the same type of thermoluminescence (TL) detectors, used in " Jožef Stefan Institute" (JSI) Ljubljana, Slovenia and "Ruđer Bošković Institute" (RBI), Zagreb, Croatia. The doses were collected by the CaF2:Mn detectors placed in plastic holders made in JSI, containing three detectors. During the irradiations holders were sticked on water slab phantom. All measurements were performed by two types of readers: TOLEDO 654 (Vinten) reader in RBI and home made reader MR 200 C in JSI. All types of the samples were irradiated at the same time at RBI (or JSI) irradiation facility. Then, samples were divided into two equal groups and the readings were performed after four days at the RBI and JSI. Detectors were irradiated by 137Cs and 60Co sources in two different ranges of doses: a) The doses of interest in accordance with the radiation protection measures were from 0.1 mSv to 10 mSv. The irradiations were performed at 137Cs source in JSI ; b) The doses possible in a case of the radiation accidents and also of interest for the radiation therapy were up to 5 Gy. These irradiations were performed at 60Co source in RBI ; Control samples held at the same conditions as irradiated detectors were used to determine the amount of the background radiation. The individual sensitivity of each detector was determined before measurements started. The results show that the linearity of the readers’ outputs in low dose range was satisfactory for both readers. For the doses higher than 0.5 Gy it was found that there exists the difference between results obtained by two readers. It was found that the deviation from the linearity of the JSI reader is up to 20%. Thus, the doses have to be analysed with the calibration curve instead of the simple straight line.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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