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Title: Study of Photoionization Processes of 3d Transition Metal Compound CoCl2 Using Synchrotron Radiation

Abstract

In this work, the photoionization processes of 3d transition metal compound CoCl2 have been investigated using monochromatized synchrotron radiation of the storage ring BESSY II and the atomic-molecular beam technique.

Authors:
;  [1]; ; ;  [2];  [3]
  1. Science Faculty, Istanbul University, Istanbul (Turkey)
  2. Institut fuer Atomare Physik und Fachdidaktik, Technische Universitaet Berlin, Berlin (Germany)
  3. Institut fuer Experimentalphysik, Universitaet Hamburg, Hamburg (Germany)
Publication Date:
OSTI Identifier:
21057207
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733309; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMIC BEAMS; BESSY STORAGE RING; COBALT CHLORIDES; MOLECULAR BEAMS; PHOTOIONIZATION; SYNCHROTRON RADIATION

Citation Formats

Goerguelueer, Oe., Tutay, A., Al-Hada, M., Richter, T., Zimmermann, P., and Martins, M. Study of Photoionization Processes of 3d Transition Metal Compound CoCl2 Using Synchrotron Radiation. United States: N. p., 2007. Web. doi:10.1063/1.2733309.
Goerguelueer, Oe., Tutay, A., Al-Hada, M., Richter, T., Zimmermann, P., & Martins, M. Study of Photoionization Processes of 3d Transition Metal Compound CoCl2 Using Synchrotron Radiation. United States. doi:10.1063/1.2733309.
Goerguelueer, Oe., Tutay, A., Al-Hada, M., Richter, T., Zimmermann, P., and Martins, M. Mon . "Study of Photoionization Processes of 3d Transition Metal Compound CoCl2 Using Synchrotron Radiation". United States. doi:10.1063/1.2733309.
@article{osti_21057207,
title = {Study of Photoionization Processes of 3d Transition Metal Compound CoCl2 Using Synchrotron Radiation},
author = {Goerguelueer, Oe. and Tutay, A. and Al-Hada, M. and Richter, T. and Zimmermann, P. and Martins, M.},
abstractNote = {In this work, the photoionization processes of 3d transition metal compound CoCl2 have been investigated using monochromatized synchrotron radiation of the storage ring BESSY II and the atomic-molecular beam technique.},
doi = {10.1063/1.2733309},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • Exploration of mass-selected clusters by soft x-ray synchrotron radiation is well suited to receive element specific information on clusters in contact with a support and to systematically follow the evolution of size-dependent electronic and geometrical properties from the smallest clusters toward the bulk. Here we describe an experimental setup, which combines cluster synthesis, mass selection, soft landing, ultrahigh vacuum transfer, and photoionization experiments such as x-ray photoelectron spectroscopy, x-ray absorption, and Auger electron spectroscopy. First spectroscopic results and experimental conditions are briefly discussed for Cu{sub 19} deposited onto the natural oxide layer of a Si-wafer surface.
  • Using the high resolution vacuum ultraviolet (vuv) photon source provided by the monochromatized undulator synchrotron radiation of the Chemical Dynamics Beamline at the Advanced Light Source, we have measured the photoionization efficiency (PIE) spectrum for Ne in the energy range of 21.56{endash}21.67 eV at a wavelength resolution of 0.3 meV [full width at half-maximum (FWHM)]. The PIE spectra for Ne obtained using 0.76 and 2.4 V/cm electric fields reveal autoionizing features attributable to the Rydberg states Ne[2{ital p}{sup 5}{ital ns}{prime}(1/2){sub 1}; {ital n}=14{endash}29] and Ne[2{ital p}{sup 5}{ital nd}{prime}(3/2){sub 1}; {ital n}=12{endash}35] converging to the spin{endash}orbit excited Ne{sup +}({sup 2}{ital P}{submore » 1/2}) state. The positions of these Rydberg states are compared to previous experimental results and those calculated using the quantum defects and IE for Ne{sup +}({sup 2}{ital P}{sub 1/2}) given in Moore [Natl. Stand Ref. Data Ser. Natl. Bur. Stand. {bold 35} (1971)]. We have also observed mass analyzed threshold ions (MATI) for Ne formed in the Ne{sup +}({sup 2}{ital P}{sub 3/2,1/2}) states. For Ar, only the MATI peak for Ar{sup +}({sup 2}{ital P}{sub 3/2}) is observed. The failure to observe the MATI peak for Ar{sup +}({sup 2}{ital P}{sub 1/2}) is attributed to shorter lifetimes of high-{ital n} Ar[3{ital p}{sup 5}{ital ns}{prime}(1/2){sub 1}] and Ar[3{ital p}{sup 5}{ital nd}{prime}(3/2){sub 1}] Rydberg states compared to the minimum time required for separating the prompt Ar{sup +} ions from the field ionized Ar{sup +} ions in this experiment. The MATI peaks for Ne{sup +}({sup 2}{ital P}{sub 3/2,1/2}) achieves a resolution of 0.7 meV (FWHM). These MATI spectra for Ne and Ar reported here represent the first such studies made using a cw vuv light source and dc electric fields. {copyright} {ital 1996 American Institute of Physics.}« less
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  • No abstract prepared.
  • The derivatives of the current-voltage characteristics of a homojunction point contact of 1T-CdI/sub 2/-type layered crystal TiS/sub 2/ and its intercalation compounds M/sub 1/4/TiS/sub 2/ (M = Mn, Fe, Co, and Ni) have been measured at 1.4 K. With reference to the available data on lattice dynamics, we have identified various inter- and intralayer acoustic and optical phonon modes. The acoustic phonon modes are strongly anisotropic compared with the optical ones in these materials. The variations of the acoustic phonon energies upon intercalation of 3d metals are strongly correlated with those of the interlayer spacing c, for which qualitative discussionsmore » are given.« less