Showing 1–2 of 2 results for author: Swakoń, J

$β^+$ radioactive nuclei created during proton therapy

Authors: Izabela Skwira-Chalot, Przemysław Sekowski, Agata Taranienko, Adam Spyra, Tomasz Matulewicz, Jan Swakoń, Joanna Matulewicz

Abstract: During proton therapy, the beam flux decreases due to inelastic interactions with nuclei. At the highest energies used in proton therapy around 25\% protons initiate nuclear reactions. This report presents the cross section measurements of proton-induced production of three $β^+$ emitters -- $^{11}$C, $^{13}$N, $^{15}$O -- with half-lives between 2 and 20 minutes, using solid C, BN and SiO$_2$ tar… ▽ More During proton therapy, the beam flux decreases due to inelastic interactions with nuclei. At the highest energies used in proton therapy around 25\% protons initiate nuclear reactions. This report presents the cross section measurements of proton-induced production of three $β^+$ emitters -- $^{11}$C, $^{13}$N, $^{15}$O -- with half-lives between 2 and 20 minutes, using solid C, BN and SiO$_2$ targets. Stacks of up to 15 targets were irradiated simultaneously with proton beams of kinetic energy below 58 MeV at the AIC-144 cyclotron of the Institute of Nuclear Physics, Polish Academy of Sciences. The measured cross sections follow the excitation function obtained in the previous experiments, with uncertainty of a few percent. △ Less

Submitted 12 November, 2025; originally announced November 2025.

Comments: Proceedings for 2nd Symposium on new trends in Nuclear and Medical Physics, 8 pages, 3 figures, accepted for publication in Acta Physics Polonica A

Detection of proton tracks with LiF Fluorescent Nuclear Track Detectors

Authors: P. Bilski, B. Marczewska, M. Sankowska, A. Kilian, J. Swakoń, Z. Siketić, P. Olko

Abstract: Fluorescent nuclear track detectors based on LiF crystals were successfully applied for detection of proton induced tracks. Irradiations were performed with protons with energy ranging from 1 MeV up to about 56 MeV and for all proton energies the fluorescent tracks were observed. The tracks are not continuous, but consist of a series of bright spots. The gaps between spots tend to narrow with decr… ▽ More Fluorescent nuclear track detectors based on LiF crystals were successfully applied for detection of proton induced tracks. Irradiations were performed with protons with energy ranging from 1 MeV up to about 56 MeV and for all proton energies the fluorescent tracks were observed. The tracks are not continuous, but consist of a series of bright spots. The gaps between spots tend to narrow with decreasing proton energy (increasing ionization density). For the highest of the studied energies, the spots are scattered so sparsely, that it is not possible to link spots belonging to one track. The intensity (brightness) of the fluorescent tracks increases with the increasing LET and agrees well with the trend established earlier for various heavier ions. △ Less

Submitted 7 March, 2024; originally announced March 2024.

Comments: 12 pages, 12 figures

Journal ref: Radiation Measurements, 2024, 107083