Thermoluminescent response of CaSO4:Eu,Ag detectors in 90Sr/90Y beta radiation beam
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Published:
Jun 1, 2021
Keywords:
thermoluminescent dosemeters, response functions, calcium sulfates, strontium 90, yttrium 90, europium, sensitivity
Main Article Content
Abstract
The results of the thermoluminescent (TL) response of the CaSO4:Eu,Ag detectors in the 90Sr/90Y beams of the Beta Secondary Standard 2 system of the Calibration Laboratory of IPEN (LCI/IPEN) are presented. The thermoluminescent glow curves were obtained from doses between 30 mGy and 500 mGy. The detectors showed a good reproducibility of the thermoluminescent response. The calculated calibration factor was (1.166 ± 0.024) x10-3mGy/a.u. and the factor determined by linear fitting was (1.120 ± 0.014) x10-3mGy/a.u., showing a difference of only 3.9%. The lower limit of detection was (4.96 ± 0.06) mGy. The detectors presentedan appropriate sensitivity for 90Sr/90Y beta radiation. Preliminary results showed suitable dosimetric characteristics for the establishment of a transfer system for beta radiation dosimetry of 90Sr/90Y beams.
Article Details
How to Cite
Oramas Polo, I., Oliveira Junot, D., Nicolucci, P., & Caldas, L. (2021). Thermoluminescent response of CaSO4:Eu,Ag detectors in 90Sr/90Y beta radiation beam. Nucleus, (68). Retrieved from http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/714
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Ciencias Nucleares
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[17]JUNOT DO, COUTO DOS SANTOS M A, SOUZA DN, VASCONCELOS et. al. Silver addition in CaSO4:Eu, TL and TSEE properties.Radiat. Meas. 2011; 46: 1500-1502.
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[2].BÖHM J. The national primary standard of the PTB for realizing the unit of the absorbed dose rate to tissue for beta radiation.Braunschweig, Germany: Physikalisch-TechnischeBundesanstalt, PTB-Dos-13. 1986.
[3].CALDAS LVE. Some calibration and dosimetry methods for beta radiation. Ph.D. Thesis. Physics Institute/São Paulo University (In Portuguese). 1980.
[4].CONTENO G, MALISAN MR, PADOVANI R. Response of thermoluminescence dosimeters to beta radiation and skin dose measurement. Phys. Med. Biol. 1984;29: 661-678.
[5].CROSS WG. Empirical expressions for beta ray point source dose distributions.Radiat. Prot. Dosim. 1997; 69: 85-96.
[6].KUMAR M, RAKESH RB, SNEHA C, RATNA P,et.al. Beta response of CaSO4:Dy based thermoluminescent dosimeter badge and its angular dependence studies for personnel monitoring applications. Radiat. Prot. Environ. 2016; 39: 132-137.
[7]. INTERNATIONAL ATOMIC ENERGY AGENCY(IAEA). Calibration of Photon and Beta Ray Sources used in Brachytherapy. IAEA-TECDOC1274.Vienna: IAEA, 2002.
[8].International Commission on Radiation Units and Measurements(ICRU). Dosimetry of beta rays and low-energy photons for brachytherapy with sealed sources. JICRU.2004; 4(2).
[9] OLIVEIRA ML, CALDAS LVE. Performance of thin CaSO4:Dy pellets for calibration of a 90Sr+90Y source. Nucl. Instr. Meth. Phys. Res. 2007; 580: 293-295.
[10].ANTONIO PL, OLIVEIRA ML, CALDAS LVE. Thin CaSO4:Dythermoluminescent dosimeters for calibration of 90Sr+90Y applicators.Appl. Radiat. Isot. 2012; 70: 790-793.
[11].KUMAR M, DHABEKAR B, MENON S, BAKSHI S,et.al. Beta response of LiMgPO4:Tb,B based OSL discs for personnel monitoring applications.Radiat. Prot. Dosim. 2013:155(4): 410-417.
[12].International Commissionon Radiation Units and Measurements(ICRU).Dosimetry of External Beta Rays for Radiation Protection.ICRU Report 56. Bethesda: ICRU, 1997.
[13].YAMASHITA T, NADA N, ONISHI H, KITAMURA S. Calcium sulphate phosphor activated by thulium or dysprosium for thermoluminescencedosimetry.Health Phys. 1971; 21: 295-300.
[14].KÁSAI, CHOBOLAR, MELLP, SZAKÁCSS et al.Preparation and investigation of thermoluminescence properties of CaSO4:Tm,Cu.Radiat. Prot. Dosim. 2007; 123: 32-35.
[15].CAMPOS LL, LIMA MF. Thermoluminescent CaSO4:Dyteflon pellets for beta radiation detection.Radiat. Prot. Dosim. 1987; 18 (2): 95-97.
[16].DENG W, GOLDYS EM. Plasmonic approach to enhanced fluorescence for applications in biotechnology and the life sciences.Langmuir 2012; 28 (27):10152-10163.
[17]JUNOT DO, COUTO DOS SANTOS M A, SOUZA DN, VASCONCELOS et. al. Silver addition in CaSO4:Eu, TL and TSEE properties.Radiat. Meas. 2011; 46: 1500-1502.
[18].JUNOT DO, COUTO DOS SANTOS MA, ANTONIO PL, CALDAS LVE, et.al.Feasibilitystudy of CaSO4:Eu, CaSO4:Eu,Ag and CaSO4:Eu,Ag(NP) as thermoluminescent dosimeters.Radiat. Meas. 2014; 71: 99-103.
[19].BSS2. Beta secondary standard 2. Operation manual. Isotrak. QSA Global GmbH. 2005.
[20].DTU Nutech. Guide to “The Risö TL/OSL Reader”. Denmark: DTU Nutech. 2015.
[21].FURETTA C. Questions and answers on thermoluminescence(TL) and optically stimulated luminescence (OSL). London: World Scientific Publishing, 2008.