Abstract
The Bonner sphere technique with activation foil made of natural tantalum is used to estimate doses during secondary particle irradiation. The neutron spectrum in the isocenter of a Varian Trilogy medical linear accelerator (linac) is calculated. The average neutron energy and the effective neutron cross section are determined. The flux of the (γ, n) reaction is calculated using a measured spectrum. The fluxes measured using Bonner spheres with a natural tantalum activation target correspond to the results from similar measurements obtained in other ways.
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This work was supported by the Russian Foundation for Basic Research, project nos. 18-00-00745 and 18-00-01263 (K) KOMFI.
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Translated by L. Mukhortova
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Gantsovsky, P.P., Zheltonozhskaya, M.V., Komarov, A.Y. et al. Radiation Technologies in Medicine: The Role of Secondary Particles in Forming Doses. Bull. Russ. Acad. Sci. Phys. 84, 1330–1334 (2020). https://doi.org/10.3103/S1062873820110106
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DOI: https://doi.org/10.3103/S1062873820110106