Energy Spectra of Photo- and Auger Electrons Generated by a Soft X-Ray Laser and Xe Cluster Interaction

ABSTRACTOptical and photoelectron spectroscopies using VUV and Soft X-ray photons are powerful tools for studies of elemental and compound actinides. Large changes in the relative atomic cross sections of the 5f, 6d and sp electrons allow decomposition of the character of the valence bands using photoemission. Resonant enhancement of photoelectrons and Auger electrons at the 5d core threshold further aids the decomposition and gives a measure of elemental specificity. Angle-resolved photoemission can be used to map the momentum dependence of the electronic states. The large changes in relative cross section with photon energy yields further details when the mapping is done at equivalent points in multiple zones. Spectra for well understood rare earth materials will be presented to establish spectral characteristics for known atomic character initial states. These signatures will be applied to the case of USb to investigate f-d hybridization near the Fermi level.

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Relation Between Hard X-ray Spectra and Electron Energy Spectra

Recent Advances in the Understanding of Solar Flares ◽

10.1007/978-94-009-7228-5_31 ◽

1983 ◽

pp. 253-257

Author(s):

Ikuro Suzuki ◽

Kin-Aki Kawabata

Keyword(s):

Electron Energy ◽

Energy Spectra ◽

X Ray

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The Effect of Microlensing on the Observed X-Ray Energy Spectra of Gravitationally Lensed Quasars

The Astrophysical Journal ◽

10.3847/1538-4357/aaf39c ◽

2019 ◽

Vol 870 (2) ◽

pp. 125 ◽

Cited By ~ 2

Author(s):

H. Krawczynski ◽

G. Chartas ◽

F. Kislat

Keyword(s):

Energy Spectra ◽

X Ray

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Diffraction properties of a strongly bent diamond crystal used as a dispersive spectrometer for XFEL pulses

Journal of Synchrotron Radiation ◽

10.1107/s1600577519004880 ◽

2019 ◽

Vol 26 (4) ◽

pp. 1069-1072 ◽

Cited By ~ 1

Author(s):

Liubov Samoylova ◽

Ulrike Boesenberg ◽

Aleksandr Chumakov ◽

Vladimir Kaganer ◽

Ilia Petrov ◽

...

Keyword(s):

Experimental Data ◽

Energy Spectrum ◽

Strain Gradient ◽

Free Electron ◽

Diamond Crystal ◽

Energy Spectra ◽

Theoretical Modelling ◽

Free Electron Lasers ◽

X Ray ◽

Stochastic Nature

Self-amplified spontaneous emission (SASE) enables X-ray free-electron lasers (XFELs) to generate hard X-ray pulses of sub-100 fs duration. However, due to the stochastic nature of SASE, the energy spectrum fluctuates from pulse to pulse. Many experiments that employ XFEL radiation require the resolution of the spectrum of each pulse. The work presented here investigates the capacity of a thin strongly bent diamond crystal to resolve the energy spectra of hard X-ray SASE pulses by studying its diffraction properties. Rocking curves of the symmetric C*(440) reflection have been measured for different bending radii. The experimental data match the theoretical modelling based on the Takagi–Taupin equations of dynamical diffraction. A uniform strain gradient has proven to be a valid model of strain deformations in the crystal.

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Monte Carlo simulations of different CT X-ray energy spectra within CTDI phantom and the influence of its changes on radiochromic film measurements

Physica Medica ◽

10.1016/j.ejmp.2019.04.015 ◽

2019 ◽

Vol 62 ◽

pp. 105-110 ◽

Cited By ~ 1

Author(s):

Nada Tomic ◽

Pavlos Papaconstadopoulos ◽

Hamed Bekerat ◽

Golub Antunovic ◽

Saad Aldelaijan ◽

...

Keyword(s):

Monte Carlo ◽

Monte Carlo Simulations ◽

Radiochromic Film ◽

Energy Spectra ◽

X Ray

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Structural Characterization of Thin Metal Overlayers by X-ray Photoelectron and Auger-Electron Forward Scattering

MRS Proceedings ◽

10.1557/proc-83-189 ◽

1986 ◽

Vol 83 ◽

Cited By ~ 9

Author(s):

W. F. Egelhoff

Keyword(s):

Ultrathin Films ◽

Surface Segregation ◽

Metal Films ◽

Epitaxial Films ◽

Forward Scattering ◽

Crystalline Lattice ◽

Auger Electrons ◽

X Ray ◽

Metal Overlayers

ABSTRACTForward scattering of XPS and Auger electrons by atoms in a crystalline lattice produce beams of enhanced intensity radiating out from the surface at angles corresponding to the internuclear axes present in the top few atomic layers. This effect has been applied to analyze the mechanism of surface segregation in ultrathin metal films, to analyze the interdiffusion at the interfaces of ultrathin films, and to assess the effects of substrate contamination on the growth of epitaxial films. The systems studied in this work are Cu, Ni, and Co on Ni(100), however the purpose of this work is not to investigate these particular systems but to use them to illustrate the capabilities of forward scattering.

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