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R. Hippler S. Datz P. D. Miller P. F. Dittner P. L. Pepmiller 《Zeitschrift für Physik D Atoms, Molecules and Clusters》1988,8(2):163-166
Cross sections for single and double electron capture and loss in 8–40 MeVO q+ ?Ne (q=5, 7, 8) collisions have been measured. The results are compared with theoretical calculations. 相似文献
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Craig Pepmiller Eleanor Bedwell Rlobert R. Kuntz Camillo A. Ghiron† 《Photochemistry and photobiology》1983,38(3):273-280
Abstract— The conventional flash photolysis of 1-methylindole in aqueous media was studied at Λexcitation ≥290 nm. The transients observed 20 μs after excitation consisted mainly of the radical cation (R+ ). the hydrated electron (e- aq ) and the triplet state (T). Electron counting experiments indicate that photoionization is the only source of R+ with e- aq /R+ = 1.07±0.09 in neutral media. Quenching of the R+ yield with H+ indicates that the fluorescent state is the precursor to 80% of the photoionization events with the remainder probably arising from a prefluorescent state. The triplet decays with a lifetime of 29 μs in deaerated neutral media. This decay is unchanged by N2 O saturation, but T reacts with acrylamide with k ≥2.8 × 109 M -1 . In 2 M Br- , R+ and T yields are increased by factors of 2–3. Consideration of fluorescence quenching and T enhancement by Br-permits an estimate of φIsc between 0.33 and 0.49. The increased R+ yield at high Br-concentrations cannot be accounted for by induced photoionization or triplet state reactions. 相似文献
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