Ionization excitation of diatomic systems having two active electrons by fast electron impact: a probe to electron correlation

Serov, Vladislav V.; Joulakian, B.; Derbov, Vladimir L.; Vinitsky, S. I.

doi:10.1088/0953-4075/38/15/014

Cited by 17 publications

(12 citation statements)

References 25 publications

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“…The second one is the molecular threebody distorted wave (M3DW) approximation coupled with an orientation-averaged molecular orbital approximation (OAMO) [20,21]. The TCC accurately describes the slow ejected electron in the electrostatic field of the residual diatomic ion as it produces [28] results in very good agreement with those obtained by a partial wave treatment of the exact solution of the two-centre Schrödinger equation in prolate spheroidal coordinates [29]. Here, the relatively fast incident and the scattered electrons are described by plane waves and the bound electron is given by self-consistent field (SCF) linear combination of atomic orbitals (LCAO) molecular orbitals (MO) [30].…”

Section: Resultsmentioning

confidence: 83%

Triply differential (e,2e) cross sections for ionization of the nitrogen molecule at large energy transfer

Naja¹,

Staicu-Casagrande²,

Lahmam‐Bennani³

et al. 2007

J. Phys. B: At. Mol. Opt. Phys.

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Measurements of the (e,2e) triply differential cross sections (TDCS) are presented for the ionization of the nitrogen molecule in coplanar asymmetric geometry at an incident energy of about 600 eV and a large energy transfer to the target. The experimental results are compared with state-of-the-art available theoretical models for treating differential electron impact ionization of molecules. The experimental TDCS are characterized by a shift towards larger angles of the angular distribution with respect to the momentum transfer direction, and by a large intensity in the recoil region, especially for ionization of the 'inner' 2σ g molecular orbital. Such shifts and intensity enhancement are not predicted by the model calculations which rather yield a TDCS symmetrically distributed around the momentum transfer direction.

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Section: Resultsmentioning

confidence: 83%

Triply differential (e,2e) cross sections for ionization of the nitrogen molecule at large energy transfer

Naja¹,

Staicu-Casagrande²,

Lahmam‐Bennani³

et al. 2007

J. Phys. B: At. Mol. Opt. Phys.

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“…Ionization of H + 2 by a monochromatic XUV radiation was modeled separately by the method based on the spheroidal Coulomb (SC) functions [19,20]. With this method, we obtained the XUV ionization amplitude and fed it to the expression for the Wigner time delay Eq.…”

Section: Further Calibration Of Our Technique Is Demonstrated Inmentioning

confidence: 99%

Angular anisotropy of time delay in XUV+IR photoionization ofH2+

Serov

Kheifets

2016

Phys. Rev. A

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We develop a novel technique for modeling of atomic and molecular ionization in superposition of XUV and IR fields with characteristics typical for attosecond streaking and RABBITT experiments. The method is based on solving the time-dependent Schrödinger equation in the coordinate frame expanding along with the photoelectron wave packet. The efficiency of the method is demonstrated by calculating angular anisotropy of photoemission time delay of the H + 2 ion in a field configuration of recent RABBITT experiments.

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“…and the solutions (Coulomb spheroidal functions) are known [15,16]. The two-center Coulomb continuum wave function may be presented as a sum of partial spheroidal waves [15] ϕ (−)…”

Section: Time Delay For Spheroidal Two-center Coulomb Wavesmentioning

confidence: 99%

Interpretation of time delay in the ionization of two-center systems

2013

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We consider the time delay of electron detachment from a Coulomb center and two-center systems in the process of ionization. It is shown that the attosecond streaking, most usual method of time delay measure, can be formally described by placing a virtual detector of the arrival time delay at a certain distance from the center of the system. This approach allows derivation of a simple formula for Coulomb-laser coupling that perfectly agrees with the results of numerical solution of the time-dependent Schrödinger equation. The dependence of the time delay upon the energy, the angular momentum projection, and the azimuthal quantum number is studied for the ionization of molecular hydrogen ion. Finally, we propose a physical interpretation of singularities, arising when the formal expression for the time delay is applied to the ionization of molecular hydrogen.

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Ionization excitation of diatomic systems having two active electrons by fast electron impact: a probe to electron correlation

Cited by 17 publications

References 25 publications

Triply differential (e,2e) cross sections for ionization of the nitrogen molecule at large energy transfer

Triply differential (e,2e) cross sections for ionization of the nitrogen molecule at large energy transfer

Angular anisotropy of time delay in XUV+IR photoionization ofH2+

Interpretation of time delay in the ionization of two-center systems

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