An energy-loss model for low- and intermediate-energy carbon projectiles in water
2012 (English)In: International Journal of Radiation Biology, ISSN 0955-3002, E-ISSN 1362-3095, Vol. 88, no 1-2, 45-49 p.Article in journal (Refereed) Published
Purpose: To model interaction cross sections and energy loss for carbon projectiles C(0)-C(6+) of 1-10(4) keV/u (u: atomic mass unit) in water. Materials and methods: The classical trajectory Monte Carlo method was used to calculate the ionisation and charge-transfer cross sections. The excitation cross sections were scaled from proton data using equilibrium charges determined from the charge-transfer cross sections. Energy loss was obtained from the singly differential cross sections, and ionisation potentials of the target and projectile. Results: The calculated total ionisation cross sections are consistent with measured data, while the calculated electron-capture cross sections are larger than experimental data by a factor of 3. By scaling the latter to the measured data, the cross sections were made consistent with these data for 1-10 keV/u energies. The present stopping cross sections agree well with experimental data below 10 keV/u, and with other model calculations above 2 MeV/u. Deviation from the latter is found where electron capture is competitive with ionisation, and also arises from different energy-transfer calculations. Conclusions: In this paper we report our efforts in the developments of full slowing-down Monte Carlo track structure calculations for carbon ions. Further development and refinement of the model are currently underway.
Place, publisher, year, edition, pages
2012. Vol. 88, no 1-2, 45-49 p.
Carbon ions, charge transfer, interaction cross sections, CTMC, equilibrium charge, stopping cross sections
Research subject Medical Radiation Physics
IdentifiersURN: urn:nbn:se:su:diva-81451DOI: 10.3109/09553002.2011.620061ISI: 000298666000008OAI: oai:DiVA.org:su-81451DiVA: diva2:561739