Molecules often fragment after photoionization in the gas phase. Usually, this process\ncan only be investigated spectroscopically as long as there exists electron correlation between\nthe photofragments. Important parameters, like their kinetic energy after separation, cannot be\ninvestigated. We are reporting on a femtosecond time-resolved Auger electron spectroscopy study\nconcerning the photofragmentation dynamics of thymine. We observe the appearance of clearly\ndistinguishable signatures from thymines neutral photofragment isocyanic acid. Furthermore,\nwe observe a time-dependent shift of its spectrum, which we can attribute to the influence of the\ncharged fragment on the Auger electron. This allows us to map our time-dependent dataset onto\nthe fragmentation coordinate. The time dependence of the shift supports efficient transformation of\nthe excess energy gained from photoionization into kinetic energy of the fragments. Our method is\nbroadly applicable to the investigation of photofragmentation processes.
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