Specific heat of selected graphites used in calorimetry of electron beam and its influence on the accuracy of measurement of large dose

• Autorzy: Panta P. , Głuszewski W.
• Konferencja: Proceedings of the XIII Scientific Meeting of the Polish Radiation Research Society, Memorial to Maria Skłodowska-Curie, 13-16 September 2004, Łódź, Poland
• Języki publikacji: EN

Abstrakty

EN

Calorimetry is applicable to both absolute calibration of routine dosimeters and absolute measurements of electron beam (EB) intensity (for industrial radiation processing). Advantages of graphite as the absorbing calorimetric material are a good heat capacity and negligible heat defect of this material. Knowledge of the specific heat capacities of the calorimetric core materials is fundamental in making absolute dose measurements. Two kinds of high-purity graphite used in calorimeters were analysed, i.e. Union Carbide grade AGOT and nuclear grade graphite [10]. There are some differences of specific heat of these graphites, up to 2% , which influence dosimetric response of calorimeters made of them.

Słowa kluczowe

EN

radiation processing; radiation sterilization; electron beam (EB); high dose calorimetry; calibration; electron energy

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2005
• Tom: Vol. 50,suppl.2
• Strony: 55--57
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Panta P.

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warszawa, Poland, Tel.: [phone], Fax: [phone]

autor

Głuszewski W.

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warszawa, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

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• 2. ASTM (1996) Standard practice E-1631 for use of calorimetric dosimetry systems for electron beam dose measurements and dosimeter calibrations
• 3. De Sorbo W, Tyler WW (1953) The specific heat of graphite from 13 to 300 K. J Chem Phys 21;10:1660−1663
• 4. Elliot SR (1998) The physics and chemistry of solids. Wiley, Chichester
• 5. ICRU (1984) Radiation dosimetry: electron beam with energies between 1 and 50 MeV. ICRU Report no. 35. Bethesda
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• 7. Krumhansl J, Brooks H (1953) The lattice vibration specific heat of graphite. J Chem Phys 21;10:1663−1669
• 8. McLaughlin WL, Boyd AW, Chadwick KH, McDonald JC, Miller A (1989) Dosimetry for radiation processing. Taylor and Francis, London
• 9. Moore WJ (1972) Physical chemistry. Prentice Hall, Englewood Ciffs, New Jersey
• 10. Nightingale RE (1962) Nuclear graphite. Academic Press, New York
• 11. Panta PP, Zagórski ZP, Głuszewski W (1998) Thermal defects of water, graphite and polystyrene affecting calorimetric response. In: Proc of an Symp on Radiation Technology for Conservation of the Environment, Vienna Austria. IAEA, Vienna, pp 449–509
• 12. Seitz F (1940) The modern theory of solids. McGraw Hill, New York-London