HABRMAN, Petr. Air equivalence of some solid fluoropolymers in photon beams. Journal of Instrumentation. England, 2021, vol. 16, No 6, p. "P06026-1"-"P06026-11", 11 pp. ISSN 1748-0221. Available from: https://dx.doi.org/10.1088/1748-0221/16/06/P06026.
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Basic information
Original name Air equivalence of some solid fluoropolymers in photon beams
Authors HABRMAN, Petr (203 Czech Republic, guarantor, belonging to the institution).
Edition Journal of Instrumentation, England, 2021, 1748-0221.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10304 Nuclear physics
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/21:A0000128
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1088/1748-0221/16/06/P06026
UT WoS 000682949000014
Keywords in English Dosimetry concepts and apparatus;Interaction of radiation with matter;Models and simulations
Tags 2022, FÚ, RIV22
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 31/3/2022 13:53.
Abstract
Two fluoropolymers polyvinylidene fluoride (PVDF) and ethylene tetrafluoroethylene (ETFE), which differ only in chemical structure and have the same atomic composition, were evaluated for use in air simulation for phantom measurements in photon beams. Photon interaction was modelled using US-NIST datasets. In order to mimic the radiation properties of air with another material, values of the following quantities were chosen for comparison: total mass attenuation coefficients, mass-energy absorption coefficients, total electron mass stopping powers, mass collision stopping powers, and mass scattering powers. The calculated ratios of the corresponding coefficients or stopping powers between the material and air were the values of interest. The results for fluoropolymers were compared with other polymers commonly used in the manufacture of phantoms. The results show that in the photon energy range from 150 keV to 1 GeV both fluoropolymers exhibit excellent dosimetric properties slightly better than air equivalent plastic C552. The effect of a carbon-based filler added to the fluoropolymer to ensure the electrical conductivity of the resulting composite was also investigated. It has been found that the increased carbon-based filler content (up to 20 wt% of carbon) added to the fluoropolymer has a very small effect on the radiation properties of the composite.
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