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- W2010233094 abstract "X-ray free-electron lasers (FELs) are promising tools for structural determination of macromolecules via coherent x-ray scattering. During ultrashort and ultraintense x-ray pulses with an atomic-scale wavelength, samples are subject to radiation damage and possibly become highly ionized, which may influence the quality of x-ray scattering patterns. We develop a toolkit to treat detailed ionization, relaxation, and scattering dynamics for an atom within a consistent theoretical framework. The coherent x-ray scattering problem including radiation damage is investigated as a function of x-ray FEL parameters such as pulse length, fluence, and photon energy. We find that the x-ray scattering intensity saturates at a fluence of $~$${10}^{7}$ photon/AA{}${}^{2}$ per pulse but can be maximized by using a pulse duration much shorter than the time scales involved in the relaxation of the inner-shell vacancy states created. Under these conditions, both inner-shell electrons in a carbon atom are removed, and the resulting hollow atom gives rise to a scattering pattern with little loss of quality for a spatial resolution $>1$ AA{}. Our numerical results predict that in order to scatter from a carbon atom 0.1 photon per x-ray pulse, within a spatial resolution of 1.7 AA{}, a fluence of $1ifmmodetimeselsetexttimesfi{}{10}^{7}$ photons/AA{}${}^{2}$ per pulse is required at a pulse length of 1 fs and a photon energy of 12 keV. By using a pulse length of a few hundred attoseconds, one can suppress even secondary ionization processes in extended systems. The present results suggest that high-brightness attosecond x-ray FELs would be ideal for single-shot imaging of individual macromolecules." @default.
- W2010233094 created "2016-06-24" @default.
- W2010233094 creator A5013085278 @default.
- W2010233094 creator A5024085206 @default.
- W2010233094 creator A5031261804 @default.
- W2010233094 date "2011-03-08" @default.
- W2010233094 modified "2023-10-16" @default.
- W2010233094 title "Impact of hollow-atom formation on coherent x-ray scattering at high intensity" @default.
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- W2010233094 doi "https://doi.org/10.1103/physreva.83.033402" @default.
- W2010233094 hasPublicationYear "2011" @default.
- W2010233094 type Work @default.