Nonlinear absorption of an X-ray pulse during the formation of warm dense matter A bright, ultrashort X-ray pulse is used to transiently create and characterize warm dense copper. As the pulse intensity is increased, the opacity of copper is strongly altered. The recorded X-ray absorption spec...
L. Vegard. On the X-Ray Spectra and the Constitution of the Atom. Philosophical Magazine and Journal of Science 23: 237-280, 1919.L. Vegard, "The X‐Ray Spectra and the Constitution of the Atom', Philos. Mag., 1918, 35, 293‐326 (317)....
The combination of these orbitals in an octahedral geometry is depicted in the centre of the figure. Full size image The electronic structure properties of transition metal complexes can be studied using X-ray spectroscopy methods including X-ray absorption spectroscopy (XAS)22,23 and photoelectron ...
X-ray properties and imaging X-rays, an electromagnetic radiation, are emitted by electrons which are outside of the atomic nucleus (unlike other high energy alpha and gamma rays, which are emitted from the atom nucleus). X-rays are similar to visible light but have a much shorter wavelength...
wavelength of the X-ray source, and phase. Phases cannot directly be measured but can be determined by several methods. After identification of all parameters, an electron density map is obtained and finally reveals the atom positions within the molecule. The protein structure can be received by...
The Basics of XPS Surface Analysis, Part 1 This presentation gives an introduction to X-ray photoelectron spectroscopy, a key technique for understanding materials. The first part of this two part series describes the fundamentals of the technique, the instrumentation, and is illustrated with The Ba...
摘要: Kaonic-atom x-ray intensities of elements Z=3,6,8,11,and20 were significantly reduced when the elements were in hydride form. The ratios I(ZHm)/I(Z) have a noticeable Z dependence. Deuterides of C and O showed slightly less x-ray emission than their hydride counterparts....
When an atom or molecule absorbs an X-ray photon, an electron can be ejected. The kinetic energy (KE) of the electron depends upon the photon energy (hν) and the binding energy (BE) of the electron (i.e., the energy required to remove the electron from the surface). By measuring ...
Atom RSS Feed X-ray crystallography is a technique that uses X-ray diffraction patterns to determine high-resolution, three-dimensional structures of molecules such as proteins, small organic molecules, and materials. The substance of interest must be in crystalline form, which typically requires test...
X-ray computed tomography (CT) is a commercially established modality for imaging large objects like passenger luggage. CT can provide the density and the effective atomic number, which is not always sufficient to identify threats like explosives and nar