Search results for: F. Gel’mukhanov

Items from 1 to 11 out of 11 results

article

Optical limiting and pulse reshaping of picosecond pulse trains by fullerene C60

Y.-P. Sun, S. Gavrilyuk, J.-C. Liu, C.-K. Wang, more

Journal of Electron Spectroscopy and Related Phenomena > 2009 > 174 > 1-3 > 125-130

We present a dynamical theory of nonlinear absorption and propagation of a laser pulse train that contains 20 subpulses with an individual pulse width of 100ps. It is shown that the accumulative nonlinearity and the reverse saturation absorption play important roles in the optical limiting performance and pulse shaping. When the incident field is not too strong, the population transfer reveals a slow...

article

High resolution X-ray photoelectron spectroscopy on nitrogen molecules

K. Ueda, R. Püttner, N. A. Cherepkov, F. Gel’mukhanov, more

The European Physical Journal Special Topics > 2009 > 169 > 1 > 95-107

This paper summarizes recent developments for experimental and theoretical studies on core-level photoelectron spectroscopy of N₂. Analysis of experimental spectra reveals that the 1σ_g and 1σ_u core-hole states differ in energy by ~100meV and in equilibrium bond length by ~0.04pm, in agreement with ab initio predictions. The ratio of the 1σ_g and 1σ_u photoionization cross sections measured in the photon...

article

K–L resonant X-ray Raman scattering as a tool for potential energy surface mapping

S. Carniato, R. Taïeb, R. Guillemin, L. Journel, more

Chemical Physics Letters > 2007 > 439 > 4-6 > 402-406

With help of theoretical calculations, we demonstrate that original pump-probe experiments, using IR laser as a pump and K–L X-ray Raman scattering as a probe, offer a powerful tool to map core-excited potential energy curves with very high energy resolution, beyond vibrational and lifetime limitations.

article

Young’s double-slit experiment using two-center core-level photoemission: Photoelectron recoil effects

F. Gel’mukhanov, V. Kimberg, X.-J. Liu, G. Prümper, more

Journal of Electron Spectroscopy and Related Phenomena > 2007 > 156-158 > Complete > 265-269

Core-level photoemission from N ₂ can be considered an analogue of Young’s double-slit experiment (YDSE) in which the double-slit is replaced by a pair of N 1s orbitals. The measured ratio between the 1σg and 1σu photoionization cross-sections oscillates as a function of photoelectron momentum, due to two-center YDSE interference, exhibiting a remarkable dependence on the vibrational sub-levels...

article

Young’s double-slit experiment using two-center core-level photoemission: Photoelectron scattering effects

X.-J. Liu, G. Prümper, F. Gel’mukhanov, N.A. Cherepkov, more

Journal of Electron Spectroscopy and Related Phenomena > 2007 > 156-158 > Complete > 73-77

Core-level photoemission from N ₂ can be considered as an analogue of Young’s double-slit experiment (YDSE) in which the double-slit is replaced by a pair of N 1s orbitals. N 1s photoelectron spectra of N ₂ are measured in the extended photon energy region up to ∼ 1 keV at unprecedented resolution. The measured ratio between the 1σg and 1σu photoionization cross-sections oscillates...

article

Elastic peak of K shell excited HCl molecule: Comparison HCl–DCl—Experiment and theory

M. Simon, L. Journel, R. Guillemin, W.C. Stolte, more

Journal of Electron Spectroscopy and Related Phenomena > 2007 > 155 > 1-3 > 91-94

Femtosecond dynamics has been recently observed by resonant X-ray Raman scattering (RXRS) after excitation along the dissociative Cl 1s→6σ∗ resonance of gas phase HCl. In this paper, we show a method to take into account and correct for self-absorption of the elastic peak, in order to allow for quantitative comparison with theory. We have performed measurements on the DCl molecule exhibiting ultrafast...

article

Role of the recoil effect in two-center interference in X-ray photoionization

K. Ueda, X.-J. Liu, G. Prümper, T. Lischke, more

Chemical Physics > 2006 > 329 > 1-3 > 329-337

X-ray photoelectron spectra of the N ₂ molecule are studied both experimentally and theoretically in the extended energy region up to 1keV. The ratio of the photoionization cross sections for the gerade and ungerade core levels displays a modulation in the high energy region caused by the two-center interference, as predicted by Cohen and Fano (CF) in 1966. The physical background of this...

article

A theoretical study of the role of the hydrogen bond on core ionization of the water dimer

V.C. Felicı́ssimo, I. Minkov, F.F. Guimarães, F. Gel’mukhanov, more

Chemical Physics > 2005 > 312 > 1-3 > 311-318

Motivated by the interest in using X-ray spectra for probing of hydrogen bonded networks we developed a quantum model for simulations of the electronic-vibrational profile of the X-ray core photoelectron spectrum of the water dimer. It is found that the potential surfaces of the donor and acceptor O1s core-ionized states of this system display a qualitative difference. Large gradients of the potential...

article

Quantum wave packet revivals in IR+X-ray pump–probe spectroscopy

F.F. Guimarães, F. Gel’mukhanov, A. Cesar, H. Ågren

Chemical Physics Letters > 2005 > 405 > 4-6 > 398-403

The wave packet revivals constitute a central concept of X-ray spectroscopy with ultra-high spectral resolution. The revival phenomenon allows to resolve the anharmonical shift or rotational structure by means of time dependent measurements and makes X-ray pump–probe spectroscopy a powerful technique to study long-term dynamics of molecules in different phases. We study the revivals referring to the...

article

X-ray Doppler spectroscopy of ultrafast fragmentation

F. Gel’mukhanov, V. Kimberg, H. Ågren

Chemical Physics > 2004 > 299 > 2-3 > 253-258

Doppler effects are now commonly observed for Auger resonances of dissociating atoms in randomly oriented molecules. The physics behind the, yet not observed, Doppler effect for fixed-in-space molecules is different in that there will appear extra Doppler resonances resulting from the diffractional scattering of the Auger electrons by the surrounding atoms. It is argued that as these resonances will...

article

Role of stray light in the formation of high-resolution resonant photoelectron spectra: an experimental and theoretical study of N ₂

R. Feifel, A. Baev, F. Gel’mukhanov, H. Ågren, more

Journal of Electron Spectroscopy and Related Phenomena > 2004 > 134 > 1 > 49-65

We show that the undular stray light, diffusely scattered by the optical system of a synchrotron beamline, can play an important role in the formation of high-resolution resonant photoelectron (RPE) spectra. The influence of the stray light is mediated through the Stokes doubling effect, with the Lorentzian tail of the spectral function being replaced by a more complicated form. This effect is shown...

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Keywords

INTERFERENCE (2)
RECOIL (2)
X-RAY PHOTOELECTRON SPECTROSCOPY (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 33.70.CA (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 33.80.EH (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 34.50.GB (2)
CORE-LEVEL PHOTOEMISSION (1)
DCL (1)
DETUNING (1)
DOPPLER EFFECT (1)
DOUBLE-SLIT EXPERIMENT (1)
ELASTIC PEAK (1)
FULLERENCE (1)
HCL (1)
HIGH-RESOLUTION (1)
HYDROGEN BONDING (1)
NITROGEN (1)
NITROGEN MOLECULE (1)
NUCLEAR MOTION (1)
OPTICAL LIMITING (1)
PULSE TRAINS (1)
RIXS (1)
RXRS (1)
SELF-ABSORPTION (1)
SINGLET–TRIPLET (1)
SPECTRAL FUNCTION (1)
ULTRAFAST FRAGMENTATION (1)
X-RAY PHOTOELECTRON (1)
X-RAY PHOTOIONIZATION (1)
X-RAY SPECTROSCOPY (1)
YOUNG’S DOUBLE-SLIT (1)
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Elsevier (10)
Springer (1)

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Search results for: F. Gel’mukhanov

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