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- W2893805653 abstract "Advances in experimental methodology aligned with technological developments, such as 3rd generation light sources, X-ray Free Electron Lasers, and High Harmonic Generation, have led to a paradigm shift in the capability of X-ray spectroscopy to deliver high temporal and spectral resolution on an extremely broad range of samples in a wide array of different environments. Importantly, the complex nature and high information content of this class of techniques mean that detailed theoretical studies are often essential to provide a firm link between the spectroscopic observables and the underlying molecular structure and dynamics. In this paper, we present approaches for simulating dynamical processes in X-ray spectroscopy based upon on-the-fly quantum dynamics with a Gaussian basis set. We show that it is possible to provide a fully quantum description of X-ray spectra without the need of precomputing highly multidimensional potential energy surfaces. It is applied to study two different dynamical situations, namely, the core-hole lifetime dynamics of the water monomer and the dissociation of CF4+ recently studied using pump-probe X-ray spectroscopy. Our results compare favourably to previous experiments, while reducing the computational effort, providing the scope to apply them to larger systems." @default.
- W2893805653 created "2018-10-05" @default.
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- W2893805653 creator A5038630391 @default.
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- W2893805653 date "2018-09-28" @default.
- W2893805653 modified "2023-09-27" @default.
- W2893805653 title "Non-equilibrium x-ray spectroscopy using direct quantum dynamics" @default.
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- W2893805653 doi "https://doi.org/10.1063/1.5047487" @default.
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