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• W2976784103 abstract "Attosecond and femtosecond spectroscopies present opportunities for the control of chemical reaction dynamics and products, as well as for quantum information processing; we address the somewhat unique situation of core-ionization spectroscopy which, for dimeric chromophores, leads to strong valence charge localization and hence tightly paired potential-energy surfaces of very similar shape. Application is made to the quantum dynamics of core-ionized Li2+. This system is chosen as Li2 is the simplest stable molecule facilitating both core ionization and valence ionization. First, the quantum dynamics of some model surfaces are considered, with the surprising result that subtle differences in shape between core-ionization paired surfaces can lead to dramatic differences in the interplay between electronic charge migration and charge transfer induced by nuclear motion. Then, equation-of-motion coupled-cluster calculations are applied to determine potential-energy surfaces for 8 core-excited state pairs, calculations believed to be the first of their type for other than the lowest-energy core-ionized molecular pair. While known results for the lowest-energy pair suggest that Li2+ is unsuitable for studying charge migration, higher-energy pairs are predicted to yield results showing competition between charge migration and charge transfer. Central is a focus on the application of Hush’s 1975 theory for core-ionized X-ray photoelectron spectroscopy to understand the shapes of the potential-energy surfaces and hence predict key features of charge migration." @default.
• W2976784103 created "2019-10-03" @default.
• W2976784103 creator A5018647545 @default.
• W2976784103 creator A5022808347 @default.
• W2976784103 creator A5036058579 @default.
• W2976784103 creator A5079865740 @default.
• W2976784103 date "2019-09-26" @default.
• W2976784103 modified "2023-10-16" @default.
• W2976784103 title "Competition between charge migration and charge transfer induced by nuclear motion following core ionization: Model systems and application to Li₂⁺" @default.
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