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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:26 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Assessment of conventional true value for absorbed dose to water in high energy photon beams in reference conditions using different cylindrical chambers (II)
Authors:
Elena Stancu(1,2), Catalin Vancea(1,2), Jiri Valenta(3), Josef Zeman(3), Eugenia Badita(1,2), Anca Scarisoreanu(1)
Affiliation:
(1)Bucharest University, Facultatea de Fizica,
National Institute for Laser, Plasma and Radiation Physics
IBA Dosimetry
E-mail
elena.stancu@inflpr.ro
Keywords:
High energy photon beam, Absorbed dose to water
Abstract:
Calibration of the ionization chambers in radiation field different from Co-60 should be carefully carried out because of influence of the beam quality on conventional true value of the absorbed dose to water quantity. In this report is presented the influence of the radiation beam quality on the conventional true value of the absorbed dose to water in high energy photon beams delivered by the Elekta Precise linear accelerator. The measurements have been performed for photon beams qualities of the TPR20,10 of 0.69, 0.75 and 0.77 according to IAEA TRS 398 protocol. The absorbed dose to water has been measured using the cylindrical chambers types PTW TN31010 and FC65-G. Performance of each reference ionization chambers are assessed through En numbers that are in good agreement with ISO 13528 requirements.
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