A time-resolved absorption spectroscopy system with an intense femtosecond KrF laser has been constructed and applied to liquid benzyl chloride under conditions of laser ablation. It has been directly confirmed over a wide fluence range that benzyl radical was formed immediately after excitation. In addition to the decay of benzyl radical, scattering of a probe light pulse was observed after ~1-2 ns at higher fluences, which was ascribed to morphological changes; the threshold was determined to be 30 mJ cm-2. The femtosecond KrF laser ablation molecular dynamics of liquid benzyl chloride is well explained in terms of a photochemical mechanism.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry