Atomistic three-dimensional coherent x-ray imaging of nonbiological systems

作者:Ho Phay J; Knight Chris; Tegze Miklos; Faigel Gyula; Bostedt C; Young L
来源:Physical Review A, 2016, 94(6): 063823.
DOI:10.1103/PhysRevA.94.063823

摘要

We computationally study the resolution limits for three-dimensional coherent x-ray diffractive imaging of heavy, nonbiological systems using Ar clusters as a prototype. We treat electronic and nuclear dynamics on an equal footing and remove the frozen-lattice approximation often used in electronic damage studies. We explore the achievable resolution as a function of pulse parameters (fluence level, pulse duration, and photon energy) and particle size. The contribution of combined lattice and electron dynamics is not negligible even for 2 fs pulses, and the Compton scattering is less deleterious than in biological systems for atomic-scale imaging. Although free-electron scattering represents a significant background, we find that recovery of the original structure is in principle possible with 3 angstrom resolution for particles of 11 nm diameter.

  • 出版日期2016-12-12
  • 单位西北大学; 中国社会科学院