Abstract
We have investigated the production of free radicals induced by swift ions during the radiolysis of oxygenated water and analyzed the underlying mechanisms in detail. To this aim, we simulated, by Monte-Carlo, the irradiation of water by projectiles with LET values ranging from 1 to 300keV/μm for a partial pressure of oxygen in air from 0 to 750mmHg, and for times up to 10μs after ion impact. For low-LET radiation, we observed an increase in production of (HO2+O2−) with oxygen pressure and a saturation. At 1μs, the saturation occurred at a pressure of 20–30mmHg and the maximal yield amounted to 0.3μmolL−1 per Gray. For the same conditions, we observed similar trends for high-LET ions, but we observed a significant reduction in the yield values and an attenuation of the saturation behavior.By underlining similarities between the yield of (HO2+O2−) and the oxygen effect observed in radiobiology, we discuss the role of (HO2+O2−) in oxygen effect and suggest a general mechanism for this phenomenon.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
