N. A. Cherepkov

Saint Petersburg State University of Aerospace and Instrumentation

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

M. Ya. Amusia

Hebrew University of Jerusalem

S. Semenov

Perm National Research Polytechnic University

ЛВ

Л. В. Чернышева

Ioffe Institute

V. Radojević

Institute of Physics

A. Yagishita

Tokyo Metropolitan Neurological Hospital

V.V. Kuznetsov

Russian Academy of Sciences

DŽ

Dj. Živanović

University of Belgrade

S. I. Sheftel

Ioffe Institute

T. Jahnke

European X-Ray Free-Electron Laser

R. Dörner

Goethe University Frankfurt

Cooperative Institutions

Goethe University Frankfurt

Tohoku University

Lawrence Berkeley National Laboratory

Kansas State University

SPring-8

The University of Tokyo

High Energy Accelerator Research Organization

Auburn University

University of Chicago

Max Planck Society

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Hartree‐Fock Deformed Jellium Calculations for Metallic Clusters

Journal of the Chinese Chemical Society (2001)

Andrey Lyalin S. Semenov Andrey V. Solov’yov N. A. Cherepkov J P Connerade

Abstract We have developed the Hartree‐Fock jellium model for deformed metal clusters by treating the quantized electron motion in the field of the spheroidal ionic jellium background in the Hartree‐Fock approximation. Using this model, we have calculated single electron energy levels as a function of the cluster deformation parameter for a series of sodium clusters with the number of atoms N in a cluster ranging from 4 to 40. We have established that the cluster deformations corresponding to the minimum total energy of the oblate and prolate clusters are in reasonable agreement with the experimental data and the predictions of other theoretical models.

Jellium

10.1002/jccs.200100063

Cite

Citations (8)

Photoionization of Polarized Atoms Applications to Free Atoms and Ferromagnets

Springer eBooks (1996)

N. A. Cherepkov

Free electron model

10.1007/978-1-4613-0421-0_33

Cite

Citations (0)

Interplay of different partial waves on vibrationally resolved photoionization of the OKshell of the CO molecule

Physical Review A (2004)

S. Semenov N. A. Cherepkov A. De Fanis Y. Tamenori M. Kitajima

The asymmetry parameter $\ensuremath{\beta}$ for the O $K$ shell photoemission of the CO molecule has been measured for different vibrational states of the residual ion. The corresponding calculations performed by us in the relaxed core Hartree-Fock approximation are in qualitative agreement with the experiment. From the analysis of theoretical data, we made the conclusion that the variation of $\ensuremath{\beta}$ with the vibrational quantum number is connected with different dependences of the dipole matrix elements in the $s\ensuremath{\sigma}$, $d\ensuremath{\sigma}$, and $f\ensuremath{\sigma}$ channels on the internuclear distance $R$ in the $\ensuremath{\sigma}*$ shape resonance.

Sigma

10.1103/physreva.70.052504

Cite

Citations (16)

Ultrafast Probing of Core Hole Localization in N ₂

Science (2008)

M. S. Schöffler J. Titze N. Petridis T. Jahnke Kathryn Cole

Although valence electrons are clearly delocalized in molecular bonding frameworks, chemists and physicists have long debated the question of whether the core vacancy created in a homonuclear diatomic molecule by absorption of a single x-ray photon is localized on one atom or delocalized over both. We have been able to clarify this question with an experiment that uses Auger electron angular emission patterns from molecular nitrogen after inner-shell ionization as an ultrafast probe of hole localization. The experiment, along with the accompanying theory, shows that observation of symmetry breaking (localization) or preservation (delocalization) depends on how the quantum entangled Bell state created by Auger decay is detected by the measurement.

Homonuclear molecule

Diatomic molecule

10.1126/science.1154989

Cite

Citations (189)

Self-consistent field hartree-fock program for atoms

Computer Physics Communications (1976)

Л. В. Чернышева N. A. Cherepkov V. Radojević

10.1016/0010-4655(76)90040-0

Cite

Citations (81)

Resonance behavior of atomic and molecular photoionization amplitudes

Physical Review A (2007)

N. A. Cherepkov V.V. Kuznetsov S. Semenov

The behavior of the partial photoionization amplitudes with a given orbital angular momentum $l$ in the complex plane in resonances is studied. In the autoionization resonances the trajectory of the amplitude in the complex plane corresponds to a circle. With increasing photoelectron energy the amplitude moves about a circle in the counterclockwise direction. The new expressions for the partial amplitudes in the resonance are proposed which are similar to the Fano form but contain the ``partial'' profile parameters which are connected with the Fano parameter $q$ by a simple relation. In the giant dipole resonances the amplitudes in the complex plane also move about a circle in the counterclockwise direction provided the Coulomb phase is excluded from the amplitude. In the correlational resonances created by channel interactions with the giant dipole resonance the trajectories of the amplitudes acquire a loop about which the amplitudes move in the counterclockwise direction. Very similar behavior of partial photoionization amplitudes in the complex plane is demonstrated also for the dipole transitions from the $K$ shells of the ${\mathrm{N}}_{2}$ molecule in the ${\ensuremath{\sigma}}^{*}$ shape resonance.

10.1103/physreva.76.012715

Cite

Citations (0)

Photoionization of oriented molecules in a gas phase

Zeitschrift für Physik D Atoms Molecules and Clusters (1992)

А. В. Головин N. A. Cherepkov V.V. Kuznetsov

Photoelectric effect

10.1007/bf01426686

Cite

Citations (71)

The Elastic Scattering of Slow Positrons on He Atoms

peac (1975)

N. A. Cherepkov M. Ya. Amusia Л. В. Чернышева S. G. Shapiro

Source

Cite

Citations (1)

Photosorption for sodium and magnesium atoms in the random-phase approximation with exchange

Journal of Physics B Atomic and Molecular Physics (1977)

M. Ya. Amusia N. A. Cherepkov I. Pavlin V. Radojević Dj. Živanović

The photoexcitation oscillator strengths and the photoionization cross sections for sodium and magnesium atoms are calculated in the random-phase approximation with exchange. The results obtained are in good agreement with other many-body calculations and with experimental data. A method of taking interchannel correlations into account is presented, and these correlations for 3s to nu p, 2p to nu d, 2p to nu s and 2s to nu p transitions are found to be important.

Random phase approximation

Photoexcitation

10.1088/0022-3700/10/8/015

Cite

Citations (40)

Photoelectron scattering effects in molecular photoionization

Journal of Electron Spectroscopy and Related Phenomena (1999)

O. Gessner F. Heiser N. A. Cherepkov B. Zimmermann U. Becker

Photon energy

10.1016/s0368-2048(98)00421-6

Cite

Citations (21)