منابع مشابه
Photon interference x-ray absorption fine structure
We report about a fine structure in x-ray absorption spectra, named photon interference x-ray absorption fine structure (pXAFS). pXAFS is due to the interference of x-rays inside the sample and extends across absorption edges. Using a platinum foil pXAFS was measured in a high precision absorption experiment. Excellent agreement with a theoretical pXAFS simulation is achieved in the energy rang...
متن کاملX-ray Absorption Fine Structure of Free Selenium Clusters
Although clusters have attracted great interest as intermediate states between atomic and condensed states of matter [1], general methods for the size-selective structural analysis of neutral clusters have not been established so far. Recently we measured the Pho toe lec t ron Pho to ion Coincidence (PEPICO) spectra for selenium dimer Se2 and larger species such as Se5 [2,3]. The PEPICO spectra...
متن کاملX-Ray Absorption Fine Structure (XAFS) Spectroscopy – A Review
X-ray absorption spectroscopy (XAS) refers to the details of how X-rays are absorbed by an atom at energies near and above the core-level binding energies of that particular atom. The absorption of X-rays on the high energy side of absorption edges does not vary monotonically in condensed matter but has a complicated behavior which extends past the edge up to about ~1 keV. This non-monotonic va...
متن کاملX-ray absorption fine structure for single crystals
X-ray absorption fine structure measurements are a prime tool at synchrotrons around the world, accounting for over 30% of all synchrotron research. They are incisive tools for elucidating local structure, ionization state and coordination geometry. However, in general, it has not been possible to apply them to perfect or near-perfect crystals, and their dominant application is to micro-samples...
متن کاملNear-edge x-ray absorption fine-structure investigation of graphene.
We report the near-edge x-ray absorption fine-structure (NEXAFS) spectrum of a single layer of graphite (graphene) obtained by micromechanical cleavage of highly ordered pyrolytic graphite on a SiO2 substrate. We utilized a photoemission electron microscope to separately study single-, double-, and few-layers graphene samples. In single-layer graphene we observe a splitting of the pi resonance ...
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ژورنال
عنوان ژورنال: Oleoscience
سال: 2012
ISSN: 1345-8949,2187-3461
DOI: 10.5650/oleoscience.12.11