• This dual-wavelength approach, combined with high flux and high spectral and temporal resolution soft X-ray absorption spectroscopy, is a new route to the study of ultrafast electronic dynamics in carbon-containing molecules and materials at the carbon K-edge. (nature.com)
  • It can therefore combine the attosecond temporal capabilities of HHG sources with the atomic-specificity and the chemical environment sensitivity of X-ray spectroscopy. (nature.com)
  • In X-ray absorption spectroscopy, intense absorption features are located around the so-called atomic edges. (nature.com)
  • Subpicosecond transient absorption spectroscopy is a powerful tool used to clarify the exciton and carrier dynamics within the organic solar cells (OSCs). (hindawi.com)
  • Forward-scattering Fixed-Target (FFT): a solid samples chamber equipped with an electromagnet, optimized for transmission spectroscopies, small angle X-ray scattering (SAXS), coherent diffraction imaging (CDI) and X-ray photon correlation spectroscopy (XPCS). (wikipedia.org)
  • His research interests are in the application of ultrafast X ray spectroscopy and scattering techniques to investigate atomic and electronic structural dynamics in condensed matter including transition-metal complexes, molecular dynamics in solution, and electronic phase transitions in correlated electron systems. (stanford.edu)
  • Revealing core-valence interactions in solution with femtosecond X-ray pump X-ray probe spectroscopy. (stanford.edu)
  • Recently, XFEL experiments of this type succeeded in obtaining complete momentum-space images of ring molecules, capturing the positions of all constituents including hydrogen atoms, enabled reconstruction of full three-dimensional geometry of smaller polyatomic molecules like halomethanes, and used photoelectron diffraction and spectroscopy to characterize X-ray-induced molecular dissociation. (aps.org)
  • This talk will review recent progress in ion-ion and ion-electron coincident measurements at XFELs, discuss application of these techniques to time-resolved experiments and the relation to more conventional X-ray photoelectron spectroscopy. (aps.org)
  • Besides the lectures, the course consists of four hands-on workshops focusing on steady-state spectroscopy, fluorescence anisotropy, broadband femtosecond spectroscopy (transient absorption and fluorescence up-conversion) and global analysis of broadband data. (laserlab-europe.eu)
  • CdSe@CdS dot@rods with diameter around 6 nm and length of either 20, 27, or 30 nm and dot@octapods with pod diameters of ∼15 nm and lengths of ∼50 nm were investigated by X-ray absorption spectroscopy. (acs.org)
  • The local structural environment of all the elements in the CdSe@CdS heterostructures was investigated at the Cd, S, and Se K-edges by taking advantage of the selectivity of X-ray absorption spectroscopy, and was compared to pure reference compounds. (acs.org)
  • Toward this goal my group has developed femtosecond soft x-ray reflection-absorption spectroscopy as a surface sensitive probe of ultrafast electron dynamics. (osu.edu)
  • We have recently demonstrated that x-ray absorption spectroscopy can be made surface specific by measuring near grazing angle reflectance using a tabletop high harmonic generation light source. (osu.edu)
  • The group is developing data Analysis software for Modelling of development spectroscopy, such as transient spectroscopy. (lu.se)
  • X-ray spectroscopy station for sample characterization at ELI Beamlines. (ajman.ac.ae)
  • Route of pesticide spread on the body surface of Blattella germanica (Linnaeus): a NanoSuit-energy dispersive X-ray spectroscopy analysis. (ajman.ac.ae)
  • Potentialities of CdZnTe Quasi-Hemispherical Detectors for Hard X-ray Spectroscopy of Kaonic Atoms at the DAΦNE Collider. (ajman.ac.ae)
  • Ultrastructural, Energy-Dispersive X-ray Spectroscopy, Chemical Study and LC-DAD-QToF Chemical Characterization of Cetraria islandica (L.) Ach. (ajman.ac.ae)
  • Chemical bonding in americium oxides probed by X-ray spectroscopy. (ajman.ac.ae)
  • Photon-shot-noise-limited transient absorption soft X-ray spectroscopy at the European XFEL. (ajman.ac.ae)
  • Femtosecond symmetry breaking and coherent relaxation of methane cations via x-ray spectroscopy. (ajman.ac.ae)
  • Absolute Energy Measurements with Superconducting Transition-Edge Sensors for Muonic X-ray Spectroscopy at 44 keV. (ajman.ac.ae)
  • X-ray photoelectron spectroscopy is ideally suited to the surface characterisation of these polymer materials as it can provide quantitative chemical state information from the upper 10nm of the material. (pankhursttrust.org)
  • Near-edge X-ray absorption fine-structure (NEXAFS) spectroscopy and atomic force microscopy (AFM) measurements reveal that the top surface of BFS4:P(NDI2OD-T2) blends is covered with a pure BFS4 capping layer. (pankhursttrust.org)
  • Transient absorption spectroscopy measurements also find evidence for rapid geminate recombination. (pankhursttrust.org)
  • They experimented with four different dyes containing fluoride, bromine, chlorine or iodine and used X-ray absorption spectroscopy to observe the process. (ubc.ca)
  • Over the last few years Free Electrons Lasers (FEL) have developed as a powerful tool to perform ultrafast spectroscopy in the XUV, Soft- and Hard- X-ray. (psi.ch)
  • Therefore, site-selective and orbital-specific K-edge soft X-ray spectroscopy techniques are used here to detect photo-induced proton dynamics in gaseous and liquid sample environments. (uni-potsdam.de)
  • The used techniques are X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). (uni-potsdam.de)
  • In addition, we investigated the ultrafast hot carrier (HC) relaxation dynamics in 2D perovskite single crystals by employing transient absorption (TA) spectroscopy and time-resolved two-photon photoemission (TR-2PPE) spectroscopy. (lu.se)
  • The main scientific activity is towards attosecond pump-probe experiments based on Photoelectron spectroscopy and transient absorption spectroscopy. (lu.se)
  • Grazing-incidence femtosecond X-ray diffraction is used to study the non-equilibrium structural dynamics in bismuth after intense near-infrared laser excitation on timescales ranging from 200 fs to 400 ps. (iucr.org)
  • Real-time studies of structural dynamics by femtosecond X-ray diffraction are reviewed, discussing results for single-crystal and polycrystalline polar materials. (iucr.org)
  • X-ray diffraction (XRD) chamber for solid samples equipped with a six degrees of freedom in-vacuum diffractometer. (wikipedia.org)
  • 1.9 to 2.40 as the decomposition temperature is increased from 150 degree to l000 degree C. This change in refractive index parallels a gradual change in the x-ray diffraction pattern from weak, diffuse lines for PuO2 ignited at 150° to sharp, well resolved lines for PuO2 ignited at 1000°C. Similar results are observed for PuO2 made by thermal decomposition of Pu2(C2O4)3*11H2O. (unt.edu)
  • A modular table-top setup for ultrafast X-ray diffraction, W. Lu, M. Nicoul, U. Shymanovich, A. Tarasevitch, M. Horn von Hoegen, D. von der Linde, and K. Sokolowski-Tinten, (Submitted 2023) arXiv:2310.10128 . (uni-due.de)
  • Ultrafast hard X-ray sources make time-resolved diffraction experiments possible, paving the way to capture the nuclear dynamics of molecules in time as well as in space, with the "molecular movie" of a CoIn as the ultimate goal. (su.se)
  • Simulation strategies for non-linear X-ray spectra and diffraction schemes are applied to molecular system of increasing complexity. (su.se)
  • The Furka experimental endstation will be dedicated to time-resolved X-Ray Diffraction (tr-XRD) and to time-resolved Resonant Inelastic X-ray Scattering (tr-RIXS) experiments in the soft X-ray regime. (psi.ch)
  • The specific characterization of material testing will introduce the principle and application range of transmission electron microscope, X-ray diffraction, absorption spectrum and transient fluorescence spectrum, etc . (alfa-chemistry.com)
  • X-ray diffraction indicates that the as prepared films were polycrystalline in nature. (physicskerala.org)
  • Amyloid deposits are composed of small (about 10 nm diameter), insoluble fibrils that form congophilic beta-pleated sheets that can be identified by x-ray diffraction. (msdmanuals.com)
  • In this work, the PSS in a solvated triiron(II) metallogrid complex is characterized using transient optical absorption and X-ray emission spectroscopies on the femtosecond time scale. (lu.se)
  • We have used a combination of optical and X-ray transient absorption spectroscopies to elucidate the mechanism of the Cu(I)-catalyzed intermolecular photocycloaddition reaction using norbornene and cyclohexene as model substrates. (uri.edu)
  • The main experimental techniques that are employed include attosecond time-resolved core-level transient absorption and transient photoelectron spectroscopies, in which soft x-ray pulses produced in a tabletop setup by high-order harmonic generation are used as probe. (ntu.edu.sg)
  • In this review article, we introduce a method to determine the absolute numbers of the excitons and carriers against delay time ( t ) only from the photoinduced absorption (PIA) and electrochemically induced absorption (EIA) spectra. (hindawi.com)
  • A series of measurements was performed to investigate the gamma ray spectra, in the region from about 100 kev to about 3 Mev, resulting from the capture of thermal neutrons in a number of elements. (unt.edu)
  • Interestingly, the x-ray spectra also show sensitivity to the dynamics of the injected electron. (nccr-must.ch)
  • Refractive index (n) and extinction coefficient (k) were calculated from absorption and reflection spectra. (physicskerala.org)
  • In addition, students are introduced to several ultrafast spectroscopic methods including conventional optical (transient absorption and fluorescence) as well as x-ray based techniques. (laserlab-europe.eu)
  • Basic knowledge of photochemistry/photophysics and spectroscopic techniques (absorption and fluorescence). (laserlab-europe.eu)
  • Pump-probe transient reflectivity using this femtosecond light source, is now enabling observation of ultrafast surface carrier dynamics with element, oxidation state, and spin state resolution. (osu.edu)
  • Femtosecond soft x-ray reflectivity developed here is now enabling such studies with the goal of advancing the field of surface chemical physics. (osu.edu)
  • This thesis describe the ultrafast photochemistry of several different transition metal complexes studied using Time-Resolved Wide Angle X-ray Scattering (TR-WAXS) at X-ray Free Electron Lasers (XFEL's). (dtu.dk)
  • Using a table-top apparatus based upon a laser plasma x-ray source and an array of cryogenic microcalorimeter x-ray detectors, we have measured the transient x-ray absorption spectrum during the ferrioxalate photoreduction reaction. (nist.gov)
  • Theoretical studies using a QM/MM approach provide insight into the valence hole localization and nuclear dynamics in the water network during the proton transfer reaction and demonstrate the sensitivity of the x-ray absorption spectrum to structural dynamics near the reaction center. (nccr-must.ch)
  • The RIXS spectrum of the OH radical reveals the complementary nature of x-rays relative to the UV absorption probes. (nccr-must.ch)
  • Commonly, the necessary dual energy data for material decomposition is obtained by manipulating the emitted x-ray spectrum from the source. (frontiersin.org)
  • A common method with clinical CT scanners is to manipulate the emitted spectrum of the x-ray source by changing the acceleration voltage, commonly known as the dual-kV method [ 1 , 5 , 6 ]. (frontiersin.org)
  • We present a table-top beamline providing a soft X-ray supercontinuum extending up to 370 eV from high-order harmonic generation with sub-13 fs 1300 nm driving pulses and simultaneous production of sub-5 fs pulses centered at 800 nm. (nature.com)
  • The long-held dream of directly observing atomic motions during the primary events governing structural dynamics has been realized using high-number-density electron pulses, and soon ultrabright X-ray pulses from fourth-generation light sources, to light up the atomic motions on 100 fs timescales. (iucr.org)
  • The European XFEL is constructed such that the electrons produce X-ray light in synchronisation, resulting in high-intensity X-ray pulses with the properties of laser light and at intensities much brighter than those produced by conventional synchrotron light sources. (wikipedia.org)
  • Ultra short laser pulses in the extreme ultraviolet and X-ray laser regime, as they are provided by free electron laser and high harmonic generation sources, fulfill the spectral and temporal requirements to resolve the coupled nuclear+electronic dynamics in the vicinity of CoIns. (su.se)
  • We theoretically investigate novel, X-Ray based experimental techniques for spectroscopic detection of CoIns with ultra short X-ray pulses. (su.se)
  • Using extremely short laser pulses to excite the active region of a small metal-dielectric-metal junction with extreme temporal precision, we can use solid-state optoelectronic devices to measure electric field transients based on the laser-field-induced generation of electric current. (attoworld.de)
  • These soft x-ray studies are complimented with optical pump-probe measurements employing few-cycle (~5 fs) laser pulses. (ntu.edu.sg)
  • Laser system used for relativistic intensity experiments and particle acceleration as well as short x-ray pulses. (lu.se)
  • The temporal resolution of X-ray transient absorption experiments with this beamline is measured to be 11 fs for 800 nm excitation. (nature.com)
  • The CHEM and XRD chambers can be couple with a high-resolution resonant inelastic X-ray scattering spectrometer to perform pump and probe RIXS experiments with a very high energy and temporal resolution. (wikipedia.org)
  • We apply these probes in optical pump X-ray probe experiments to investigate valence excited-state proton transfer capabilities of aqueous 2-thiopyridone. (uni-potsdam.de)
  • Grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements confirm that BFS4 and P(NDI2OD-T2) are semicrystalline with both polymers retaining their semicrystalline nature when blended. (pankhursttrust.org)
  • Steady-state photoconductivity was measured from 300 to 400 K. Carrier lifetime was calculated from transient photoconductivity measurements at room temperature at different intensities of illumination. (physicskerala.org)
  • The result is spontaneous emission of X-ray photons which are coherent (in phase) like laser light, unlike X-rays emitted by ordinary sources like X-ray machines, which are incoherent. (wikipedia.org)
  • By monitoring three photon-in/photon-out channels, x-ray transmission, total and dispersed x-ray emission as a function of x-ray photon energy and time delay, we find evidence of the elusive H2O+ radical cation as well as a clean and distinctive signature of the OH radical, complementing earlier studies in the UV. (nccr-must.ch)
  • Multi-messenger observations of the transient sky to detect cosmic explosions and counterparts of gravitational wave mergers critically rely on orbiting wide-FoV telescopes to cover the wide range of wavelengths where atmospheric absorption and emission limit the use of ground facilities. (arxiv.org)
  • A characteristic shift of N K-edge X-ray absorption resonances as well as a distinct X-ray emission line are established by us as spectral fingerprints of N deprotonation in the system. (uni-potsdam.de)
  • In this talk I will introduce the experimental endstation Furka of the soft x-ray beamline (Athos) of the SwissFEL. (psi.ch)
  • 5 ps) dynamics of the system was studied with optical Transient Absorption and TR-WAXS. (dtu.dk)
  • prof. Jens Uhlig is focused on studying charge carrier dynamics and structural dynamics with x-ray - and optical methods. (lu.se)
  • Local CO2 adsorption was quantified by processing the images taken at transient period of uptake to study the equilibrium and dynamics of adsorption process in different coal microlithotypes. (cdc.gov)
  • SCS offers a variety of different optical sources to be used as a pump to induce transient states or photoactivated reactions in the samples. (wikipedia.org)
  • The students will learn about several ultrafast techniques, including both optical and x-ray based methods, how these techniques can be applied to various systems and how the data is treated and analysed. (laserlab-europe.eu)
  • This technique makes use of attosecond bursts of x-ray light as short as 70 attoseconds (SI units: as). (attoworld.de)
  • Here we report the experimental realization of anultrafast two-color X-ray pump X-ray probe transient absorption experiment performed in solution. (stanford.edu)
  • The process of x-ray parametric down conversion (XPDC) of x-ray photons in a pair of x-ray (signal) and visible (idler) photons is predominantly mediated by the valence electron density and provides a valence sensitive probe of electronic structure. (aps.org)
  • Alternatively, systems with two x-ray sources and detectors can be used as demonstrated by [ 7 ] and [ 8 ]. (frontiersin.org)
  • Uncovering the 3d and 4d Electronic Interactions in Solvated Ru Complexes with 2p3d Resonant Inelastic X-ray Scattering. (stanford.edu)
  • The 2p3d RIXS maps contain a higher level of spectral information than the L3 X-ray absorption near edge structure (XANES). (stanford.edu)
  • Extending these effects into the x-ray spectral domain is challenging due to their inherently low cross section [1]. (aps.org)
  • The hydrogen-equivalent column densities were obtained from the Exploring the X-ray Transient and variable Sky project (EXTRAS) which provides equivalent N_H values from X-ray spectral fits of observations within the XMM-Newton Data Release. (caltech.edu)
  • Part One covers enhanced techniques for characterization of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry. (chipsbooks.com)
  • Recent advances in pulsed electron and X-ray sources make it now possible to obtain atomic level views of transient phenomena in matter. (iucr.org)
  • Absorption Coefficient-- Fractional absorption of the energy of an unscattered beam of x- or gamma- radiation per unit thickness (linear absorption coefficient), per unit mass (mass absorption coefficient), or per atom (atomic absorption coefficient) of absorber, due to transfer of energy to the absorber. (cdc.gov)
  • The scientific interest of SCS is focused on the exploration of light-induced transient phenomena in quantum materials as well as in molecules. (wikipedia.org)
  • 9.829 The European X-Ray Free-Electron Laser Facility (European XFEL) is an X-ray research laser facility commissioned during 2017. (wikipedia.org)
  • The peak brilliance of the European XFEL is billions of times higher than that of conventional X-ray light sources, while the average brilliance is 10,000 times higher. (wikipedia.org)
  • The SQS instrument is developed to investigate fundamental processes of light-matter interaction in the soft X-ray wavelength radiation. (wikipedia.org)
  • Yet, these processes are accessible at high-brilliance storage-ring based x-ray sources and x-ray free electron lasers. (aps.org)
  • In particular, the change in charge state during sequential dissociation processes of small molecules and dimers is monitored in real-time in three examples: Upon photo double ionization with synchrotron radiation (a) the electron transfer via spin-orbit coupling in water molecules and (b) the interatomic decay of transient states in NeKr dimers is followed on the potential energy landscape and timed. (aps.org)
  • Decay processes towards energetically lower lying states in transient molecular geometries result in the formation of excited state relaxation pathways. (uni-potsdam.de)
  • The total absorption coefficient is the sum of individual energy absorption processes (see Compton Effect, Photoelectric Effect, and Pair Production). (cdc.gov)
  • To directly characterize the electronic structure at different areas of a 2D perovskite single crystal, electrons emitted from Pb 5d and I 4d core levels are mapped at the edge and the bulk areas by using X-ray photoemission electron microscopy. (lu.se)
  • In conventional x-ray imaging, contrast depends on material density. (frontiersin.org)
  • A 10fs X-ray pump pulse creates a localized excitation by removing a 1s electron from an Fe atom in solvated ferro- and ferricyanide complexes. (stanford.edu)
  • We interpret this finding as inelastic x-ray scattering from a XUV polaritonic excitation in diamond. (aps.org)
  • Soliton self-compression of a 10 fs pump pulse down to 1.2 fs (envelope duration) or 412 attoseconds (field transient) as the pump energy is increased in a 3 m long, 250 μm diameter, helium-filled HCF. (lupo-lab.com)
  • We developed a pulsed table top x-ray source based on a water target combined with a novel energy dispersive microcalorimetric detection system. (lu.se)
  • Composition was determined from energy dispersive analysis of X-ray. (physicskerala.org)
  • Following the ensuing Auger-Meitner cascade, the second X-ray pulse probes the Fe 1s3p transitions in resultant novel core-excited electronic states. (stanford.edu)
  • The purpose of the experiment was to supplement the high energy capture gamma ray data in order to remove some of the ambiguities from the proposed energy level schemes and to obtain information for the Shielding Group of Brookhaven National Laboratory on elements normally found in reactors. (unt.edu)
  • With the access to larger X-ray energies a typical TR-WAXS experiment has access to larger scattering vectors. (dtu.dk)
  • In a recent experiment, we successfully measured the XPDC cone resulting of nonlinear x-ray scattering of photons of 10 keV from diamond, for idler energies in the range of 100 eV. (aps.org)
  • The use of superconducting acceleration elements developed at DESY allows up to 27,000 repetitions per second, significantly more than other X-ray lasers in the U.S. and Japan can achieve. (wikipedia.org)
  • Among the sample of Galactic transient X-ray binaries (SXTs) discovered to date, about 70 have been proposed as likely candidates to host a black hole. (iac.es)
  • Topics discussed include theoretical and multi-wavelength and multi-messenger observational aspects of active galactic nuclei, galaxy systems, gamma-ray bursts, X-ray/gamma-ray binaries, supernovae and supernova remnants, neutron stars, pulsars and pulsar wind nebulae, cataclysmic variables, and modern aspects of astro-particle physics. (sissa.it)
  • In particular, the element specific absorption edges allow for material decomposition, when energy bins can be selected in the vicinity of the edge. (frontiersin.org)
  • Acquiring images with different x-ray energies will thus allow for separation of materials with similar density based on their specific absorption edges [ 2 , 3 ]. (frontiersin.org)
  • Recent experimental efforts (see e.g. ref. 12 for a review) have thus focused on increasing the photon energy available from table-top X-ray sources, to reach the soft X-ray domain (SXR, 100-1000 eV). (nature.com)
  • Absorption-- The process by which a chemical penetrates the exchange boundaries of an organism after contact, or the process by which radiation imparts some or all of its energy to any material through which it passes. (cdc.gov)
  • Absorption Coefficient, Linear-- A factor expressing the fraction of a beam of x- or gamma radiation absorbed in a unit thickness of material. (cdc.gov)
  • Acute Exposure, Radiation-- The absorption of a relatively large amount of radiation (or intake of a radioactive material) over a short period of time. (cdc.gov)
  • First, the thesis describes the theoretical background of how X-rays can be utilized to reveal the structure of matter and the role X-ray scattering for the study of the photochemistry of transition metal complexes in solution. (dtu.dk)
  • The final part of the thesis regards the role of the X-ray energy on a TR-WAXS structuralanalysis. (dtu.dk)
  • Modelling the simulated data using an incomplete model shows that the prediction power of an incomplete model increases with an increase in X-ray energy. (dtu.dk)
  • Thanks to continuing technological improvements, miniaturised space instruments operating as distributed-aperture constellations are offering new capabilities for the study of high energy transients to complement ageing existing satellites. (arxiv.org)
  • In this paper we characterise the performance of the upcoming joint SpIRIT + HERMES-TP/SP nano-satellite constellation for the localisation of high-energy transients through triangulation of signal arrival times. (arxiv.org)
  • In this study, a post-image reconstruction material decomposition method is constructed for a low-energy micro-CT setup using a photon counting x-ray detector. (frontiersin.org)
  • Absorption Coefficient, Mass-- The linear absorption coefficient per cm divided by the density of the absorber in grams per cubic centimeter. (cdc.gov)
  • It is frequently expressed as µ/, where µ is the linear absorption coefficient and the absorber density. (cdc.gov)
  • They form very weak, transient bonds that exist for less than 10 microseconds, and they typically make up just a tiny portion of all the atoms in a solar cell. (ubc.ca)
  • Advanced X-Ray Crystallography: The New Frontiers (K. Rissanen, ed. (nyu.edu)
  • Many environments contain redox transition zones, where transient oxygenation events can modulate anaerobic reactions that influence the cycling of iron (Fe) and carbon (C) on a global scale. (biomedcentral.com)
  • Overall, we provide evidence that transient oxygenation events play an important role in directing anaerobic pathways within soil microbiomes, which is expected to alter Fe and C cycling in redox-dynamic environments. (biomedcentral.com)
  • This paper presents application of quantitative X-ray computerized tomography (CT) imaging in investigating the spatial distribution of adsorption kinetics. (cdc.gov)
  • It was sponsored by the Department of Science and Technology and the National Research Foundation of South Africa through the South African Gamma-Ray Astronomy Programme (SA-GAMMA) and the University of Namibia s Office of the Pro-Vice Chancellor Research, Innovation and Development. (sissa.it)
  • Momentum-resolved nonlinear x-ray scattering thus provides a means to determine the microscopic structure of EUV polaritons on the length scale of the x-ray wavelength. (aps.org)