Influence of angle's ranges for recording an X-ray fluorescence hologram on reconstructed atomic images

LOW ENERGY ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS

Influence of angle's ranges for recording an X-ray fluorescence hologram on reconstructed atomic images

XIE Hong-Lan，

CHEN Jian-Wen，

GAO Hong-Yi，

ZHU Hua-Feng，

LI Ru-Xin，

XU Zhi-Zhan

Nuclear Science and Techniques

Vol.15, No.3

pp.160-165

Published in print 01 Jun 2004

CLC：O434.1,O438.1,O766+.3

21300

X-ray fluorescence holography (XFH) is a novel method for three-dimensional (3D) imaging of atomic structure. Theoretically, in an XFH experiment, one has to measure the fluorescence energy on a spherical surface to get well-resolved 3D images of atoms. But in practice, the experimental system arrangement does not allow the measurement of the fluorescent intensity oscillations in the full sphere. The holographic information losses because of the limited sampling range (less than 4π) will directly result in defective reconstructed atomic images. In this work, the atomic image of a Fe single crystal (001) was reconstructed by numerically simulating X-ray fluorescence holograms of the crystal at different recording angle's ranges and step lengths. Influences of the ranges of azimuth angles and polar angles and the step length of polar angles on the reconstructed atomic images were discussed.

X-ray fluorescence holographyCrystal structureFourier transform

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