Photoionization of excited rare-gas atoms

Duzy, C.; Hyman, H.

doi:10.1103/physreva.22.1878

Cited by 82 publications

(21 citation statements)

References 8 publications

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“…The core-electron potential of [256] has been used in [257] to compute the photoionization cross sections of the excited states of Li, Na, and K. [258]. These AOs were often used for computing the core potential in extended calculations with inclusion of CP and other many-electron correlations [259][260][261][262]. The HF approach allows one to take into account many-electron correlations by inclusion of the term dependence of the AO in equation 24, which can substantially change the shape of the radial function P n (r) [263][264][265][266] and reduce the residual part of the electron-electron interaction in a subsequent application of many-body perturbation theory (MBPT).…”

Section: 21mentioning

confidence: 99%

“…using Thomas-Fermi potential as in [286], LDA [254] as in [255], Hartree-Fock [258] as in [259][260][261]285,296], or even again semi-empirical [256,284] as in [284,288]). Using such approximations in combination with semi-empirically corrected transition operator D(r) (30) allows one to achieve calculations accurate to within few percent without, however, clarifying the nature of the V CP (r) potential.…”

Section: Dirac-fock Approximationmentioning

confidence: 99%

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Photoionization dynamics of excited Ne, Ar, Kr and Xe atoms near threshold

Sukhorukov¹,

Petrov²,

Schäfer³

et al. 2012

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

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A review of experimental and theoretical studies of the threshold photoionization of the heavier rare-gas atoms is presented, with particular emphasis on the autoionization resonances in the spectral region between the lowest two ionization thresholds (mp 5 2 P 3/2 and mp 5 2 P 1/2 , with m = 2, 3, 4, and 5 for Ne, Ar, Kr, and Xe, respectively). Observed trends in the positions, widths, and shapes of the autoionization resonances in dependence of the atomic number, the principal quantum number n, the orbital angular momentum quantum number and further quantum numbers such as K, J and F specifying the fine-and hyperfine-structure levels, are summarized and discussed in the light of ab initio and multichannel quantum defect theory calculations. The dependence of the photoionization spectra on the initially prepared neutral state, e.g. the 1 S 0 ground state, the mp 5 (m + 1)s 3 P 2 and mp 5 (m + 1)s 3 P 0 metastable levels and other states prepared from the ground or metastable levels in single-and multiphoton processes, are also discussed, including results on the photoionization of aligned and oriented samples and on photoelectron angular distributions. The effects of various approximations in the theoretical treatment of photoionization in these systems are analysed. The very large and at first sight discouraging diversity of observed phenomena and the numerous anomalies in spectral structures associated with the threshold ionization of the rare-gas atoms can be described in terms of a limited set of interactions and dynamical processes. Examples are provided illustrating characteristic aspects of the photoionization, and sets of recommended parameters describing the energy-level structure and photoionization dynamics of the rare-gas atoms are presented which were extracted in a critical analysis of the very large body of experimental and theoretical data available on these systems in the literature.

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Section: 21mentioning

confidence: 99%

Section: Dirac-fock Approximationmentioning

confidence: 99%

Photoionization dynamics of excited Ne, Ar, Kr and Xe atoms near threshold

Sukhorukov¹,

Petrov²,

Schäfer³

et al. 2012

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

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“…It is noteworthy that an energy threshold exists for ICEC through excited states due to Eq. (3) which is for Ne(2p −1 3p) with EA (Ne + ) = 2.943 eV t = 6.51 eV and t = 10.50 eV, respectively, when the neighbors are Benzene (I P (Bz) = 9.45 eV [12]) or Xenon (I P (Xe) = 12.13 eV [13]). Another example that has been studied in detail for the merit of very small virtual photon energies is [2] e( ) + Mg + + Br − → Mg + Br + e( ).…”

Section: Icec Through Excited Statesmentioning

confidence: 99%

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Bande

Pont

Gokhberg

et al. 2015

EPJ Web of Conferences

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Abstract. The interatomic Coulombic electron capture (ICEC) process has recently been predicted theoretically for clusters of atoms and molecules. For an atom A capturing an electron e( ) it competes with the well known photorecombination, because in an environment of neutral or anionic neighboring atoms B, A can transfer its excess energy in the ultrafast ICEC process to B which is then ionized. The cross section for e( ) + A + B → A − + B + + e( ) has been obtained in an asymptotic approximation based on scattering theory for several clusters [1,2]. It was found that ICEC starts dominating the PR for distances among participating species of nanometers and lower. Therefore, we believe that the ICEC process might be of importance in the atmosphere, in biological systems, plasmas, or in nanostructured materials. As an example for the latter, ICEC has been investigated by means of electron dynamics in a model potential for semiconductor double quantum dots (QDs) [3]. In the simplest case one QD captures an electron while the outgoing electron is emitted from the other. The reaction probability for this process was found to be relatively large.

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“…Through a roughly qualitative comparison we found that for the photoionization from the excited state 1s ↓ 1s ↑ 2s ↓ 2s ↑ 2p 3 ↓ 2p 2 ↑ 3p ↑ the results of TDSLHF method are in the same order of magnitude as the available experimental data [40] and other theoretical results [41,42]. For example, at the photon energy 3.41 eV, the PICS of TISLHF and TDSLHF methods are 3.99 Mb and 6.70…”

Section: A Photoionization From the Ground State Of Nementioning

confidence: 68%

“…Mb, respectively, for the photoionization from the excited state 1s ↓ 1s ↑ 2s ↓ 2s ↑ 2p 3 ↓ 2p 2 ↑ 3p ↑ , while the experimental results for the photoionization from the excited state 1s 2 2s 2 2p 5 3p 3 D 3 is 2.15 Mb [40], the theoretical results of the central-field approximation for the photoionization from the excited state 1s 2 2s 2 2p 5 3p is about 5.0 Mb [41], and the theoretical results of the single-configuration Hartree-Fock method for the photoionization from the excited state 1s 2 2s 2 2p 5 3p 1 S is about 4.5…”

Section: A Photoionization From the Ground State Of Nementioning

confidence: 99%

Time-dependent localized Hartree-Fock density-functional linear response approach for photoionization of atomic excited states

Zhou

Chu

2009

Phys. Rev. A

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We present a time-dependent localized Hartree-Fock density-functional linear response approach for the treatment of photoionization of atomic systems. This approach employs a spin-dependent localized HartreeFock exchange potential to calculate electron orbitals and kernel functions, and thus can be used to study the photoionization from atomic excited states. We have applied the approach to the calculation of photoionization cross sections of Ne ground state. The results are in agreement with available experimental data and have comparable accuracies with other ab initio theoretical results. We have also extended the approach to explore the photoionization from Ne excited states and obtained some results for the photoionization from outer-shell and inner-shell excited states.

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Photoionization of excited rare-gas atoms

Cited by 82 publications

References 8 publications

Photoionization dynamics of excited Ne, Ar, Kr and Xe atoms near threshold

Photoionization dynamics of excited Ne, Ar, Kr and Xe atoms near threshold

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Time-dependent localized Hartree-Fock density-functional linear response approach for photoionization of atomic excited states

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