Radiation Chemistry of High-Energy Carbon, Neon, and Argon Ions: Integral Yields from Ferrous Sulfate Solutions

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Abstract
Chemical yields of Fe3+ were measured from FeSO4 solutions irradiated in the presence and absence of O2 with Ca, Ne and Ar ions from the Berkeley Bevalac facility [University of California, Berkeley, California USA]. Maximum ion energies were, respectively, about 375, 520 and 445 MeV/amu [atomic mass unit]. G(Fe3+) decreases with increasing beam penetration and with increasing atomic number of the incident ion. The results are compared with current theoretical expectations of the behavior of these particles in an aqueous absorber. The chemical yields are consistently higher than theoretically predicted, by amounts varying from < 6.2% (C ions) to < 13.2% (Ar ions). The additional yields are possibly attributable to fragmentation of the primary particle beams.

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