Optical spectroscopy of Landau-Zener interactions new results

Devdariani, A. Z.; Sebyakin, Y. I.; Tscherkovny, S. I.

doi:10.1063/1.39920

Cited by 23 publications

(45 citation statements)

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“…19 Another work penned by Devdariani et al deals with the spectra of the decay products occurring in atomic collisions by including the interaction of resonances with two local models. 20 Finally, there are two recent papers analyzing the vibronic resonance states which result from a conical intersection between a bound and a dissociative electronic state. 21,22 However, apart from the paper by Estrada et al, 17 none of these works studied the complex PES and their intersections explicitly.…”

Section: Introductionmentioning

confidence: 99%

Intersections of potential energy surfaces of short-lived states: The complex analogue of conical intersections

Feuerbacher

Sommerfeld

Cederbaum

2004

The Journal of Chemical Physics

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Whereas conical intersections between potential energy surfaces of bound states are well known, the interaction of short-lived states has been investigated only rarely. Here, we present several systematically constructed model Hamiltonians to study the topology of intersecting complex potential energy surfaces describing short-lived states: We find the general phenomenon of doubly intersecting complex energy surfaces, i.e., there are two points instead of one as in the case of bound states where the potential energy surfaces coalesce. In addition, seams of intersections of the respective real and imaginary parts of the potential energy surfaces emanate from these two points. Using the Sigma* and Pi* resonance states of the chloroethene anion as a practical example, we demonstrate that our complete linear model Hamiltonian is able to reproduce all phenomena found in explicitly calculated ab initio complex potential energy surfaces.

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Section: Introductionmentioning

confidence: 99%

Intersections of potential energy surfaces of short-lived states: The complex analogue of conical intersections

Feuerbacher

Sommerfeld

Cederbaum

2004

The Journal of Chemical Physics

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“…In particular, they stressed the importance of the indirect coupling between the 2 1 S and the 2 1 P states taking place via the metal continuum. Following Devdariani et al 58 and Makhmetov et al, 56 the interaction between two discrete states and a continuum can be described by means of a Hamiltonian matrix in the subspace spanned by the two states,…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…The 2 1 S and 2 1 P M ϭ0 levels also interact together either directly or indirectly via the coupling with conduction band. [56][57][58] As the ion is placed closer to the surface, the two peaks get broader and shift towards higher energies; they even coalesce for a certain distance, 57 so that below 7a 0 from the image plane they cannot be resolved. For ͉M ͉ϭ1 only one peak can be seen, corresponding to the 2 1 P M ϭϮ1 state.…”

Section: Structure Of ⌫"Em… Above the Fermi Level Rates For The mentioning

confidence: 97%

Theory of Auger neutralization and deexcitation of slow ions at metal surfaces

et al. 1998

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The contribution of conduction electrons to the Auger neutralization rate of a slow ion at a metal surface has been calculated. We have considered the scattering of He ϩ on Al and studied the effect of the ion potential on the neutralization rate. This has been accomplished by taking into account the modification of the wave function of the captured electron induced by the presence of the ion. The effect of the ion potential is shown to increase the Auger neutralization rate. We have also calculated the Auger deexcitation of He* (nϭ2) atoms in front of an aluminum surface, including the distorsion created by the surface on the atom states. In this case, the deexcitation rate is reduced by the mixing of atom and surface states, which also leads to a nonvanishing deexcitation rate of metastable He (2 1 S). ͓S0163-1829͑98͒06543-6͔

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“…Much of the essential physics, however, is already revealed by considering two levels coupled to one structureless continuum [38]. In the following we give a simple derivation of H eff for the two-level system (2) and evaluate its properties.…”

Section: Discussionmentioning

confidence: 99%

Resolubility of image-potential resonances

Höfer

Echenique

2016

Surface Science

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A theory of image-potential states is presented for the general case where these surface electronic states are resonant with a bulk continuum. The theory extends the multiple scattering approach of Echenique and Pendry into the strong coupling regime while retaining independence from specific forms of surface and bulk potentials. The theory predicts the existence of a well-resolved series of resonances for arbitrary coupling strengths. Surprisingly, distinct image-potential resonances are thus expected to exist on almost any metal surface, even in the limiting case of jellium.

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Optical spectroscopy of Landau-Zener interactions new results

Cited by 23 publications

References 0 publications

Intersections of potential energy surfaces of short-lived states: The complex analogue of conical intersections

Intersections of potential energy surfaces of short-lived states: The complex analogue of conical intersections

Theory of Auger neutralization and deexcitation of slow ions at metal surfaces

Resolubility of image-potential resonances

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