Pulse Radiolysis Of Water And Aqueous Solutions Tr PDF Download

X-ray induced aqueous chemical species were examined for reaction characteristics and homogeneous dispersion. A 3 krad, 50 ns, X-ray pulse from an electron accelerator produced the hydrated electron, e( - )aq, in solutions of Na2CO3, Ba(OH)2, H2SO4, and HClO4. Kinetic spectroscopy with nanosecond range resolving time measured the optical absorption of e( - )aq but showed no evidence of any nonhomogeneous dispersion of e( - )aq. This indicates that any spur lifetime of e( - )aq is less than 1 ns. The hydrated electron has a rapid, apparent second-order decay in air-free alkaline solutions during the first half microsecond after the X-ray pulse. It is proposed this decay may be due to the reaction of e( - )aq with either H2O(+) or excited water, H2O*. The data are such that neither possible species can be dismissed as less plausible than the other. (Author).