Track Effects in Radiation Chemistry: Production of HO2. in the Radiolysis of Water by High-LET (58)Ni Ions

Article abstract of DOI:10.1021/j100310a028

The yields of HO2^. produced in the radiolysis of water by (58)Ni ions having energies up to 460 MeV have been determined.For these radiations the differential yields for HO2^. production increase from 0.26 to 0.43 molecules/100 eV over an LET range of 260-520 eV/Angstroem.From these measurements a limiting yield of 0.57 molecules/100 eV is estimated for HO2^. production by energy deposited in the track core at very high LETs.These studies demonstrate the feasibility of carrying out significant radiation-chemical studies with beams of particles having LETs in excess of 200 eV/Angstroem.