The effect of inhomogenities on single-molecule imaging by hard XFEL pulses

Z. Jurek, G. Faigel

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Abstract

We study the local distortion of the atomic structure in small biological samples illuminated by X-ray free electron laser (XFEL) pulses. We concentrate on the effect of inhomogenities: heavy atoms in a light matrix and non-homogeneous spatial distribution of atoms. In biological systems we find both. Using molecular-dynamics-type modeling it is shown that the local distortions about heavy atoms are larger than the average distortion in the light matrix. Further it is also shown that the large spatial density fluctuations also significantly alter the time evolution of atomic displacements as compared to samples with uniform density. This fact has serious consequences on single-particle imaging. This is discussed and the possibility of a correction is envisaged.

Original languageEnglish
Article number68003
JournalEPL
Volume86
Issue number6
DOIs
Publication statusPublished - Nov 27 2009

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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