Effects of electric fields on the photodetachment cross section of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>ion near threshold

Stewart, J. E.; Bryant, H. C.; Harris, P.G.; Mohagheghi, A. H.; Donahue, J. B.; Quick, C. R.; Reeder, R. A.; Yuan, V. W.; Hummer, Charles R.; Smíth, W. W.; Cohen, S.

doi:10.1103/physreva.38.5628

Cited by 53 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 1987, Bryant et al reported an observation of the effects of an electric field on a photodetachment cross section [13]. They observed the effect of a motional electric field on the photodetachment cross section of H Further work with H was reported subsequently by the same group (Stewart et al [14] and Harris et al [15]). …”

Section: Introductionmentioning

confidence: 99%

s-wave photodetachment in a static electric field

1993

View full text Add to dashboard Cite

Photodetachmentfrom negative ions in a static electric field has been studied using Cl and S These experiments were done with greater precision than previous studies and allow a quantitative comparison of data with theory. A 10-keV ion beam was sent through a region with fields of up to 1.5 kV/cm applied parallel to the beam velocity. A pulsed dye-laser beam, perpendicular to the ion beam, photoneutralized the ions. The relative cross sections were measured by detecting the resulting fast neutral atoms. Detachment below threshold and oscillations on the cross section above threshold were observed near the S threshold at 16269.5 cm ' and near the Cl threshold at 29138.3 cm '. The phase of the oscillations in the data is in good agreement with predictions for s-wave photodetachment in a static electric field, but the amplitude of the oscillations is found to be slightly reduced.PACS number(s): 32.80.Fb, 32.60.+i

show abstract

Section: Introductionmentioning

confidence: 99%

s-wave photodetachment in a static electric field

1993

View full text Add to dashboard Cite

show abstract

“…Of course, modeling a 3D structure with a 1D attractive potential is a rather crude approximation , but we are only interested in estimating the orders of magnitude. The reported binding energy

E = - 0.7542

eV corresponds to the very deep δ well with length

Λ = - 2.2 \times 10^{- 15}

m [see Eq. ].…”

Section: Discussionmentioning

confidence: 99%

Evolution of electric‐field‐induced quasibound states and resonances in one‐dimensional open quantum systems

Olendski

2016

Annalen der Physik

View full text Add to dashboard Cite

A comparative analysis of three different time-independent approaches to studying open quantum structures in a uniform electric field E was performed using the example of a one-dimensional attractive or repulsive δ-potential and the surface that supports the Robin boundary condition. The three considered methods exploit different properties of the scattering matrix S(E ; E ) as a function of energy E : its poles, real values, and zeros of the second derivative of its phase. The essential feature of the method of zeroing the resolvent, which produces complex energies, is the unlimited growth of the wave function at infinity, which is, however, eliminated by the time-dependent interpretation. The real energies at which the unitary scattering matrix becomes real correspond to the largest possible distortion, S = +1, or its absence at S = −1 which in either case leads to the formation of quasibound states. Depending on their response to the increasing electric intensity, two types of field-induced positive energy quasibound levels are identified: electron-and hole-like states. Their evolution and interaction in the enlarging field lead ultimately to the coalescence of pairs of opposite states, with concomitant divergence of the associated dipole moments in what is construed as an electric breakdown of the structure. The characteristic features of the coalescence fields and energies are calculated and the behavior of the levels in their vicinity is analyzed. Similarities between the different approaches and their peculiarities are highlighted; in particular, for the zerofield bound state in the limit of the vanishing E , all three methods produce the same results, with their outcomes deviating from each other according to growing electric intensity. The significance of the zero-field spatial symmetry for the formation, number, and evolution of the electron-and hole-like states, and the interaction between them, is underlined by comparing outcomes for the symmetric δ geometry and asymmetric Robin

show abstract

“…Due to the interference with the z 3 Stark resonance, the nodal pattern of the family of long-lived states has also a nodal structure consisting of two maxima in the region where the square well extends. Long-lived "new born" resonance states similar to the ones currently under consideration have been known to give rise to a peak structure in photodetachment experiments of negative ions driven by a weak-time periodic field in the presence of a static electric field [5,6].…”

Section: "New-born" Resonance States That Are Not Associated Withmentioning

confidence: 99%

“…In photodetachment experiments of negative ions driven by a week time periodic field in the presence of a static electric field [5,6], the long-lived states are known to give rise to a peak structure [5,6] while the short-lived ones do not. These latter ones however have been shown to have observable effects in the photodetachment rate of the negative ions when driven by a weak time periodic field in the presence of a static field [3].…”

Section: "New-born" Resonance States That Are Not Associated Withmentioning

confidence: 99%

“…One family consists of long-lived resonance states that are localized above the potential well, while the other family consists of shortlived overlapping resonances that are localized below the potential well. Resonance states similar to the long-lived ones that are not associated with the field-free Hamiltonian have been probed as peaks in experiments measuring the photodetachment rate of negative ions driven by a weak time periodic field in the presence of a static field [5,6]. However, little is known about the "nature" of the short-lived states that are not associated with the fieldfree Hamiltonian.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stark and field-born resonances of an open square well in a static external electric field

Emmanouilidou

Moiseyev

2005

The Journal of Chemical Physics

View full text Add to dashboard Cite

Besides the well known Stark resonances, which are localized in the potential well and tunnel through the potential barrier created by the dc-field, "strange" long and short-lived resonances are analytically obtained. These resonances are not localized inside the potential well. We show that the narrow ones are localized above the potential well. These narrow resonances give rise to a peak structure in a 1D scattering experiment. We also show that the broad overlapping resonances are associated with the static electric field potential barrier. These "strange" overlapping resonances do not give rise to a peak structure in a 1D scattering experiment. We propose a 2D experimental set-up where in principle these short-lived states should be observed as peaks. Broad overlapping resonances, associated only with the static electric field potential barrier, could also have observable effects in a N > 1 array of quantum wells in the presence of a truncated static electric field. This last problem is associated with the resonance tunnelling phenomena which are used in the construction of resonance-tunnelling diodes and transistors.

show abstract

Effects of electric fields on the photodetachment cross section of theH−ion near threshold

Cited by 53 publications

References 25 publications

s-wave photodetachment in a static electric field

s-wave photodetachment in a static electric field

Evolution of electric‐field‐induced quasibound states and resonances in one‐dimensional open quantum systems

Stark and field-born resonances of an open square well in a static external electric field

Contact Info

Product

Resources

About