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Ambient dose equivalent measurements in secondary radiation fi elds at proton therapy facility CCB IFJ PAN in Krakow using recombination chambers

Jakubowska E. A., Gryziński M. A., Golnik N., Tulik P., Stolarczyk L., Horwacik T., Zbroja K., Góra Ł.

Nukleonika

2016

Vol. 61, No. 1

23--28

This work presents recombination methods used for secondary radiation measurements at the Facility for Proton Radiotherapy of Eye Cancer at the Institute for Nuclear Physics, IFJ, in Krakow (Poland). The measurements of H*(10) were performed, with REM-2 tissue equivalent chamber in two halls of cyclotrons AIC-144 and Proteus C-235 and in the corridors close to treatment rooms. The measurements were completed by determination of gamma radiation component, using a hydrogen-free recombination chamber. The results were compared with the measurements using rem meter types FHT 762 (WENDI-II) and NM2 FHT 192 gamma probe and with stationary dosimetric system.

Local ion density in tracks of secondary electrons generated in tissue by diagnostic X-rays

Golnik N., Zielczyński M.

Biocybernetics and Biomedical Engineering

2005

Vol. 25, no. 1

65-72

Local ion density in the tracks of secondary electrons generated in tissue by diagnostic X-rays was determined on the basis of measurements of the recombination index of the radiation quality (RIQ), measured for X-rays ranging from 40 kVp to 230 kVp, and for several gamma radiation sources. The values obtained ranged from 1 for a (137)Cs gamma radiation source to 1.3+1.9 for X-rays. The peak value was observed for a (241)Am source and for 100 kVp X-rays. Values of RIQ reflect the effective local ion density of the investigated radiation and correlate with the relative biological effectiveness of the radiation.

Improved dosimetry for BNCT by activation foils, modified thermoluminescent detectors and recombination chambers

Bilski P., Golnik N., Olko P., Pytel K., Tracz G., Tulik P., Zielczyński M.

Nukleonika

2004

Vol. 49, nr 2

51-56

Boron neutron capture therapy (BNCT) is an experimental therapy of selected tumours, based on a nuclear reaction initiated by the capture of thermal neutron by the 10B nucleus. After 10B had been delivered selectively to tumour cells, it can be activated by neutrons to deliver locally lethal high-LET radiation. BNCT beams are complex mixed radiation fields, because of broad neutron energy range, presence of gamma contamination and necessity of precise determination of several dose components. The paper presents some results of the research project on BNCT dosimetry with activation foils, recombination chambers and TL detectors.