Analysis of dosimetric peaks of MgB4O7:Dy (40% Tefl on) versus LiF:Mg,Ti TL detectors

• Autorzy: Paluch-Ferszt M. , Kozłowska B. , Oliveira de Souza S. , Freire de Souza L. , Nascimento Souza D.

Identyfikatory

DOI

10.1515/nuka-2016-0011

• Konferencja: Proceedings of the Warsaw Medical Physics Meeting 2014 (2014 ; 15-17 May ; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

Magnesium tetraborate doped with dysprosium (MgB4O7:Dy) is known as a good thermoluminophor for personal dosimetry of gamma ray and X-ray radiation because of its high sensitivity and close tissue equivalence. This material can be produced by different routes. The sintered pastilles of magnesium tetraborate mixed with Tefl on (40%) used in this work were manufactured at the Federal University of Sergipe, Department of Physics by the solid-state synthesis. Magnesium tetraborate was already used for high-dose dosimetry, exhibiting linearity for a wide range of doses. In this work, the authors examined its main characteristics prior to potential use of detectors in everyday dosimetry, comparing this material to a widely used LiF:Mg,Ti phosphor. The following tests infl uencing dosimetric peaks of MgB4O7:Dy were presented: (1) the shape of the glow curves, (2) annealing conditions and post-irradiation annealing and its infl uence for background of the detectors, (3) the choice of the heating rates at the read-out and (4) the threshold dose, that is, the lowest possible dose to be measured. Simil ar tests were performed with LiF:Mg,Ti detectors, produced and widely used in Poland. The results were compared and discussed.

Słowa kluczowe

EN

thermoluminescent detectors; MgB4O7:Dy; LiF:Mg,Ti

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2016
• Tom: Vol. 61, No. 1
• Strony: 49--52
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Paluch-Ferszt M.

• Institute of Physics, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland, Tel.: [phone], Fax: [phone]

autor

Kozłowska B.

• Institute of Physics, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland, Tel.: [phone], Fax: [phone]

autor

Oliveira de Souza S.

• Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil

autor

Freire de Souza L.

• Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil

autor

Nascimento Souza D.

• Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil

Bibliografia

• 1. Niewiadomski, T. (1991). Dozymetria termoluminescencyjna w praktyce. Kraków: Institute of Nuclear Physics PAN.
• 2. Waligorski, M., Lesiak, J., & Bubula, E. (1999). Application of individually calibrated solid LiF:Mg,Ti (MTS-N) detectors in clinical dosimetry. Radiat. Prot. Dosim., 84(1/4), 377–380.
• 3. Budzanowski, M. (2001). Ocena przydatności ultraczułych detektorów termoluminescencyjnych LiF: Mg,Cu,P(MCP-N) w dozymetrii promieniowania gamma w środowisku. Kraków: Institute of Nuclear Physics PAN. (Report no. 1875/D).
• 4. Bilski, P., Olko, P., & Puchalska, M. (2007). High-dose characterization of different LiF phosphors. Radiat. Meas., 42(4/5), 582–585.
• 5. Puchalska, M. (2008). Ocena narażenia astronautów przebywających w otwartej przestrzeni kosmicznej na promieniowanie kosmiczne. Doctoral dissertation, Institute of Nuclear Physics PAN, Kraków, Poland.
• 6. Zimmerman, J. (1971). The radiation-induced increase of thermoluminescence sensitivity of the dosimetry phosphor LiF (TLD-100). J. Phys. C-Solid State Phys., 4(18), 3265–3276.
• 7. Morgan, T., & Brateman, L. (1977). Energy and directional response of Harshaw TLD 100 thermoluminescent dosimeters in diagnostic X-ray energy-range. Health Phys., 33(4), 339–341.
• 8. Prokic, M. (1986). Magnesium borate in TL dosimetry. Radiat. Prot. Dosim., 17, 393–396.
• 9. Lochab, S., Pandey, A., & Sahare P. (2007). Nanocrystalline MgB4O7:Dy for high dose measurement of gamma radiation. Phys. Status Solidi A-Appl. Mat., 204(7), 2416–2425.
• 10. Takenago, M., Yamanoto, O., & Yamashita, T. (1977). In Proceedings of the 5th International Conference on Lum Dosimetry (P. 148). Sao Paulo, Brazil.
• 11. Prokic, M. (1980). Development of highly sensitive CaSO4:Dy and MgB4O7:Dy/Tm sintered thermoluminescent dosimeters. Nucl. Instrum. Methods, 175(1), 83–86.
• 12. Driscoll, C., Mundy, S. J., & Elliot, J. (1981). Sensitivity and fading characteristics of thermoluminescent magnesium borate. Radiat. Prot. Dosim., 1(2), 135–137.
• 13. Barbina, V., Contento, G., & Furetta, C. (1982). Main properties of a new TL phosphor compared to other widely used phosphors. In Proceedings of the 3. International symposium held in Inverness, 6–11 June 1982 (pp. 618–624). Scotland, UK: Society for Radiological Protection.
• 14. Oduko, J., Harris, S. J., & Stewart, J. (1984). Magnesium borate: some advantages and disadvantages for practical dosimetry. Radiat. Prot. Dosim., 8, 257–260.
• 15. Ranogajec-Komor, M., & Osvay, M. (1986). Dosimetric characteristics of different TL phosphors. Radiat. Prot. Dosim., 17, 379–384.
• 16. Souza, L. F., Vidal, R. M., & Souza, S. O. (2014). Thermoluminescent dosimetric comparison for two different MgB4O7:Dy production routes. Radiat. Phys. Chem., 104, 100–103. DOI: 10.1016/j.radphyschem. 2014.04.036.
• 17. TLD Poland 2001–2005. LiF:Mg,Ti thermoluminescent phosphor & pellets. Retrieved July 8, 2015, from http://www.tld.com.pl/tld/mts.html.
• 18. MIKROLAB 2001–2012. Manual Reader-Analyser TL RA’94. Retrieved July 8, 2015, from http://tld. com.pl/ra/index.html.
• 19. Furetta, C. (2003). Handbook of thermoluminescence. Italy: World Scientific Publishing.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.