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Extended X-ray absorption fine structure
About: Extended X-ray absorption fine structure is a research topic. Over the lifetime, 10452 publications have been published within this topic receiving 276744 citations.
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TL;DR: In this paper, the fundamental absorption coefficient of liquid water is found to comply with Urbach rule at the low energy tail of the water fundamental absorption, while hexagonal and amorphous ices show only a gradual increase of absorption intensity toward the higher energy in the range from 7 to 10 eV.
Abstract: Fundamental absorption bands of water are studied in its various phases. Cubic ice has a well-defined absorption band at about 8.7 eV, while hexagonal and amorphous ices show only a gradual increase of absorption intensity toward the higher energy in the range from 7 to 10 eV. Absorption coefficient of liquid water is found to comply with Urbach rule at the low energy tail of the fundamental absorption.
66 citations
TL;DR: In this paper, the adsorption of 1,3-butadiene and 1-butene on Pt(111), and Pd(111) was studied by near edge X-ray absorption fine structure (NEXAFS).
66 citations
TL;DR: In this article, the effects of co-doping on the structure and reactivity of hexagonal birnessite and the crystal chemistry of Co and Ni were investigated by powder X-ray diffraction (XRD), elemental analysis, field emission scanning electron microscopy (FE-SEM), X-Ray photoelectron spectroscopy (XPS) and Xray absorption fine structure (XAFS) spectra.
66 citations
TL;DR: In this article, free-bound and free-free radiative absorptions by a pair of atoms are discussed and explicit formulas are derived for the free bound and free free absorption cross sections.
Abstract: Free-bound and free-free radiative absorptions by a pair of atoms are discussed and explicit formulas are derived for the free-bound and free-free absorption cross sections. The theory is applied to the interpretation of helium absorption near 600 a and it is argued that the first two bands observed arise from transitions into quasibound resonating vibrational levels of the A 1Σ u + state. The shape of the A 1Σ u + potential energy curve is derived for internuclear distances between 2 and 3 a. The absorption data analysis lead to a potential barrier of magnitude 0·049 ev. The effects on the absorption structure of replacing 4He by 3He are predicted. An iterative procedure is described that simultaneously locates the energy and evaluates the width of a quasibound-shape resonance state.
66 citations