Accession Number : AD0662736

Title :   PULSE RADIOLYSIS OF AQUEOUS SOLUTIONS,

Corporate Author : ARMY NUCLEAR DEFENSE LAB EDGEWOOD ARSENAL MD

Personal Author(s) : Klein,Nathan ; Fanning,James E. , Jr. ; Warner,John W.

Report Date : NOV 1967

Pagination or Media Count : 50

Abstract : 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)

Descriptors :   (*RADIATION CHEMISTRY, SOLUTIONS(MIXTURES)), ELECTRONS, WATER, MOLECULAR ASSOCIATION, X RAYS, PHOTOLYSIS, SODIUM COMPOUNDS, CARBONATES, BARIUM COMPOUNDS, HYDROXIDES, SULFURIC ACID, PERCHLORIC ACID, ABSORPTION SPECTRA

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE