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

被引：16

作者：

Jurek, Z. ^{[1
]}

Faigel, G. ^{[1
]}

机构：

[1] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

来源：

EPL | 2009年 / 86卷 / 06期

关键词：

RAY; DYNAMICS;

D O I：

10.1209/0295-5075/86/68003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. Copyright (C) EPLA, 2009

引用

页数：6

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