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Microdosimetry for a carbon ion beam using track-etched detectors

I. Ambrožová ; V. Vondráček ; M. Šefl ; V. Štěpán ; Katerina Pachnerova Brabcova (Institutionen för teknisk fysik, Nukleär teknik) ; O. Ploc ; S. Incerti ; M. Davídková
Radiation Protection Dosimetry (0144-8420). Vol. 166 (2015), 1-4, p. 247-252.
[Artikel, refereegranskad vetenskaplig]

Track-etched detectors (TED) have been used as linear energy transfer (LET) spectrometers in heavy ion beams for many years. LET spectra and depth-dose distribution of a carbon ion beam were measured behind polymethylmethacrylate degraders at Heavy Ion Medical Accelerator in Chiba, Japan. The measurements were performed along monoenergetic beam with energy 290 MeV u-1 in different positions: (1) at beam extraction area, (2) at beginning, (3) maximum and (4) behind the Bragg peak region (0, 117, 147 and 151 mm of water-equivalent depth, respectively). The LET spectra inside and outside of the primary ion beam have been evaluated. TED record only heavy charged particles with LET above 8-10 keV μm-1, while electrons and ions with lower LET are not detected. The Geant4 simulation toolkit version 4.9.6.P01 has been used to estimate the contribution of non-detected particles to absorbed dose. Presented results demonstrate the applicability of TED for microdosimetry measurements in therapeutic carbon ion beams.



Denna post skapades 2015-09-30. Senast ändrad 2015-10-21.
CPL Pubid: 223455

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Subatomär fysik

Chalmers infrastruktur