Time-resolved Photoelectron Imaging with a Femtosecond Vacuum-ultraviolet Light Source: Dynamics in the ~ A

Time-resolved Photoelectron Imaging with a Femtosecond Vacuum-ultraviolet Light Source: Dynamics in the ~ A PDF Author: Vít Svoboda
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ISBN:
Category :
Languages : en
Pages :

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Time-resolved Photoelectron Imaging with a Femtosecond Vacuum-ultraviolet Light Source: Dynamics in the ~ A

Time-resolved Photoelectron Imaging with a Femtosecond Vacuum-ultraviolet Light Source: Dynamics in the ~ A PDF Author: Vít Svoboda
Publisher:
ISBN:
Category :
Languages : en
Pages :

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The Simulation of Femtosecond VUV Time-Resolved Molecular Spectroscopy

The Simulation of Femtosecond VUV Time-Resolved Molecular Spectroscopy PDF Author: Michael Robert Coates
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Femtosecond vacuum-ultraviolet (VUV) laser pulses enable the interrogation of molecules in their electronically excited states on the timescale of nuclear motion. The present study focuses on the simulation of these experiments using electronic structure calculations and nuclear wavepacket dynamics propagations. The simulation of the evolution of the wavepacket enables a calculation of spectroscopic observables using rigorous quantum mechanical approaches. This approach has been applied to simulate the VUV time-resolved photoelectron spectroscopy (TRPES) spectra of cyclopropane (C3H6) and nitromethane (CH3NO2).

Femtosecond Time Resolved Photoelectron Spectroscopy in the Extreme Ultraviolet Region

Femtosecond Time Resolved Photoelectron Spectroscopy in the Extreme Ultraviolet Region PDF Author: Peter Šiffalovič
Publisher:
ISBN:
Category :
Languages : en
Pages : 104

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Encyclopedia of Interfacial Chemistry

Encyclopedia of Interfacial Chemistry PDF Author:
Publisher: Elsevier
ISBN: 0128098945
Category : Science
Languages : en
Pages : 5276

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Book Description
Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry, Seven Volume Set summarizes current, fundamental knowledge of interfacial chemistry, bringing readers the latest developments in the field. As the chemical and physical properties and processes at solid and liquid interfaces are the scientific basis of so many technologies which enhance our lives and create new opportunities, its important to highlight how these technologies enable the design and optimization of functional materials for heterogeneous and electro-catalysts in food production, pollution control, energy conversion and storage, medical applications requiring biocompatibility, drug delivery, and more. This book provides an interdisciplinary view that lies at the intersection of these fields. Presents fundamental knowledge of interfacial chemistry, surface science and electrochemistry and provides cutting-edge research from academics and practitioners across various fields and global regions

Time Resolved Photoelectron Imaging of Electronic Relaxation Dynamics in Anionic Clusters

Time Resolved Photoelectron Imaging of Electronic Relaxation Dynamics in Anionic Clusters PDF Author: Graham Bailey Griffin
Publisher:
ISBN:
Category :
Languages : en
Pages : 164

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Book Description
Electronic relaxation dynamics are measured on a femtosecond timescale in three types of anionic clusters using time resolved photoelectron imaging. Auger relaxation timescales following interband excitation of electron-hole pairs in small Hgn- (n=9-20) are determined. Relaxation dynamics following charge transfer are investigated in I-(CH3CN)n (n=5-10). Internal conversion lifetimes of excited states of large anionic water clusters, (H2O)n- and the fully deuterated isotopolog (D2On- (n=25-200), as well as solvation dynamics in these clusters, are evaluated. A pronounced increase in the Auger lifetime of interband-excited states of Hgn - clusters with 13 or more constituent mercury atoms is revealed, indicating a shift from the van der Waals interactions typical of smaller clusters towards covalent bonding between mercury atoms in the cluster. This creates more delocalized electronic orbitals which reduce the coulomb interactions of the electron-hole pair, increasing the amount of time required for recombination and ejection of Auger electrons. Initial dynamics following charge transfer in I-(CH3CN)n clusters are associated with localization of an initially diffuse electron contained within the cluster. Later dynamics are assigned to rearrangement of the network of CH3CN molecules and ejection of neutral iodine from the cluster. Ultrafast internal conversion lifetimes of the first electronic excited state of anionic water clusters are measured at larger cluster sizes and with better time resolution than previous measurements. A marked reduction in the size dependence of the internal conversion lifetime at large sizes indicates a change in the electron water interaction for clusters larger than n0≈70. Extrapolating internal conversion lifetimes of the larger clusters towards infinite cluster size predicts a condensed phase internal conversion lifetime of ̃50 fs for the hydrated electron, supporting the nonadiabatic relaxation model. Solvation dynamics on both the ground and excited states are also observed.

X-Ray Spectrometry

X-Ray Spectrometry PDF Author: Kouichi Tsuji
Publisher: John Wiley & Sons
ISBN: 0470020423
Category : Science
Languages : en
Pages : 616

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Book Description
X-Ray Spectrometry: Recent Technological Advances covers the latest developments and areas of research in the methodological and instrumental aspects of x-ray spectrometry. Includes the most advanced and high-tech aspects of the chemical analysis techniques based on x-rays Introduces new types of X-ray optics and X-ray detectors, covering history, principles, characteristics and future trends Written by internationally recognized scientists, all of whom are eminent specialists in each of the sub-fields Sections include: X-Ray Sources, X-Ray Optics, X-Ray Detectors, Special Configurations, New Computerization Methods, New Applications This valuable book will assist all analytical chemists and other users of x-ray spectrometry to fully exploit the capabilities of this set of powerful analytical tools and to further expand applications in such fields as material and environmental sciences, medicine, toxicology, forensics, archaeometry and many others.

Time-Resolved Photoelectron Imaging with a VUV Low-Order-Harmonic Source - From Femtochemistry to Femtochirality

Time-Resolved Photoelectron Imaging with a VUV Low-Order-Harmonic Source - From Femtochemistry to Femtochirality PDF Author: Vít Svoboda
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Femtosecond Spectroscopy with Vacuum Ultraviolet Pulse Pairs

Femtosecond Spectroscopy with Vacuum Ultraviolet Pulse Pairs PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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We combine different wavelengths from an intense high-order harmonics source with variable delay at the focus of a split-mirror interferometer to conduct pump-probe experiments on gas-phase molecules. We report measurements of the time resolution (

Photoelectron Spectroscopy

Photoelectron Spectroscopy PDF Author: Stefan Hüfner
Publisher: Springer Science & Business Media
ISBN: 3662031507
Category : Science
Languages : en
Pages : 525

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Book Description
An up-to-date introduction to the field, treating in depth the electronic structures of atoms, molecules, solids and surfaces, together with brief descriptions of inverse photoemission, spin-polarized photoemission and photoelectron diffraction. Experimental aspects are considered throughout and the results carefully interpreted by theory. A wealth of measured data is presented in tabullar for easy use by experimentalists.

Research in Progress

Research in Progress PDF Author:
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 274

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Book Description