Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2014 | 59 | 1 | 9-13
Tytuł artykułu

Taurine-EVA copolymer-paraffin rods dosimeters for EPR high-dose radiation dosimetry

Treść / Zawartość
Warianty tytułu
Języki publikacji
Taurine/EPR rods (3 × 10 mm) have been prepared by a simple technique in the laboratory where taurine powder was mixed with a molten mixture of paraffin wax and an ethylene vinyl acetate (EVA) copolymer. The binding mixture EVA/Paraffin does not present interference or noise in the EPR signal before or after irradiation. The rods show good mechanical properties for safe and multi-use handling. An EPR investigation of radiation induced radicals in taurine rods revealed that there are two types of radicals produced after exposure to gamma radiation (60Co). EPR spectra were recorded and analyzed - also the microwave power saturation and modulation amplitude were studied and optimized. Response of taurine to different radiation doses (1.5-100 kGy) was studied and found to follow a linear relationship up to 100 kGy. Radiation induced radicals in taurine persists and showed a noticeable stability over 94 days following irradiation. Uncertainities associated with the evaluation of radiation doses using taurine dosimeters were discussed and tabulated. It was found that taurine possesses good dosimetric properties using EPR spectroscopy in high doses in addition to its simple spectrum.
Słowa kluczowe

Opis fizyczny
  • Radiation Dosimetry Department, National Institute of Standards (NIS), 12211 Tersa Str., Haram-Giza, P.O. Box 136, Egypt and Faculty of Science and Humanities, Physics Department, Salman bin Abdulaziz University, Alkharj, Saudi Arabia, Tel.: +2 012 450 9723, Fax: +2 023 386 7451,
  • National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City 11371, P. O. Box 8029, Cairo, Egypt
  • National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City 11371, P. O. Box 8029, Cairo, Egypt
  • 1. Bradshaw, W. W., Cadena, D. G., Crawford, G. W.. & Spetzler, H. A. W. (1962). The use of alanine as a solid dosimeter. Radiat. Res., 17, 11-21.
  • 2. Guidelli, E. J., Ramos, A. P., Zaniquelli, M. E. D., Nicolucci, P., & Baffa, O. (2012). Synthesis of silver nanoparticles using DL-alanine for ESR dosimetry applications.Radiat. Phys. Chem., 81(3), 301-307.
  • 3. Nagy,V., & Desrosiers, M. (1996) Complex time dependence of the EPR signal of irradiated L-α-alanine. Appl.Radiat. Isot., 47, 789-793.
  • 4. Heydari, M., Malinen, E., Hole, E., & Sagstuen, E. (2002). Alanine radicals. 2. The composite polycrystalline alanine EPR spectrum studied by ENDOR, thermal annealing and spectrum simulations. J. Phys. Chem. A, 106, 8971-8977.
  • 5. Malinen, E., Heydari, M., Sagstuen, E., & Hole, E. (2003).Alanine radicals. Part 3. Properties of components contributing to the EPR spectrum of X-irradiated alanine dosimeters. Radiat. Res., 159, 23-32.
  • 6. Sagstuen, E., Hole, E., Haugedal, S., & Nelson, W. (1997).Alanine radicals: structure determination by EPR and ENDOR of single crystals X-irradiated at 295. J. Phys.Chem. A, 101, 9763-9772.
  • 7. Maghraby, A. (2011). Uncertainty attributed to signal averaging in a single averaged alanine EPR spectrum for low-dose applications. Radiat. Prot. Dosim., 143(1), 6-12.[WoS]
  • 8. Maghraby, A., & Tarek, E. (2005) A new EPR dosimeter based on sulfanilic acid. Radiat. Meas., 41, 170-176.
  • 9. Maghraby, A. (2007). A sensetive EPR dosimetry system based on sulfamic acid. Nucl. Instrum. Methods Phys. Res.Sect. B-Beam Interact. Mater. Atoms, 262, 46-50.
  • 10. Maghraby, A., Salama, E., & Mansour, A. (2011). EPR/ homotaurine: A possible dosimetry system for high doses.Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom.Dect. Assoc., 659, 504-507.
  • 11. Olsson, S., Bagherian, S., Lund, E., Carlsson, G., & Lund, A. (1999). Ammonium tartrate as an ESR dosimeter material. Appl. Radiat. Isot., 50, 955-965.
  • 12. Vestad, T., Malinen, E., Lund, A., Hole, E., & Sagstuen, E. (2003). EPR dosimetric properties of formats. Appl.Radiat. Isot., 59, 181-188.
  • 13. Maghraby, A., Mansour, A., & Tarek, E. (2012). Taurine for EPR dosimetry. Radiat. Environ. Biophys., 51, 255-261.[WoS]
  • 14. Maghraby, A. (2012). Ionizing radiation induced radicals.In M. Nenoi (Ed.), Current topics in ionizing radiation research. InTech Publishers. Retrieved from research/ionizing-radiation-induced-radicals. DOI: 10.5772/34925.[Crossref]
  • 15. Soliman, Y., & Abdel-Fattah, A. (2012). Magnesium lactate mixed with EVA polymer/paraffin as an EPR dosimeter for radiation processing application. Radiat.Phys. Chem., 81(2), 1910-1916.[WoS]
  • 16. Ciesielski, B., Schutka, K., Penkowski, M., & Sagstuen, E. (2004). EPR study of light illumination effects on radicals in gamma-irradiated L-alanine. Spectrochim. Acta A, 60(6), 1327-1333.
  • 17. El-Faramawy, N. (2005). Comparison of γ- and UV-light- -induced EPR spectra of enamel from deciduous molar teeth. Appl. Radiat. Isot., 62(2), 191-195.
  • 18. Bureau International des Poids et Mesures. (2008). Evaluation of measurement data - Guide to the expression of uncertainty in measurement. JCGM 100:2008(F). Severes Cedex, France.
  • 19. International Organization for Standardization. (1995).Guide to the expression of uncertainty in measurement.GUM:1995. Geneva.
  • 20. Taylor, B. N, & Kuyatt, C. E. (1994). Guidelines for evaluating and expressing the uncertainty of NIST measurement results. National Institute of Standards and Technology: Gaithersburg, MD. (NIST Technical Note 1297).
  • 21. United Kingdom Accreditation Service. (2012). The expression of uncertainty and confidence in measurement. UKAS Publication M3003. Retrieved from
Typ dokumentu
Identyfikator YADDA
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.