Single- and multiphoton detachment from stored<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>ions

Kwon, Namic; Armstrong, Peter S.; Olsson, Torsten; Trainham, R.; Larson, D. J.

doi:10.1103/physreva.40.676

Cited by 33 publications

(42 citation statements)

References 35 publications

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“…The experimental results are shown in figure 2 by open symbols. Blondel et al (1989b) and Kwon et al (1989) However, the best results of the present paper, shown by a solid curve in figure 2, indicate that the cross section is substantially larger. Let us repeat once more that this increase of the cross section is due to the events which happen at large separations, where all correlation corrections are controlled very well.…”

Section: Resultsmentioning

confidence: 60%

“…For example, the results of a number of experimental and theoretical works on the cross sections and photoelectron angular distributions in the negative halogen ions (see, e.g., van der Hart 1996, Gribakin et al 1999 and references therein) differ significantly each from other. A number of experimental works reported the cross sections and angular asymmetry parameters of the two-photon detachment from the halogen negative ions at selected photon energies (Trainham et al 1987, Blondel et al 1989a, Kwon et al 1989, Davidson et al 1992, Sturrus et al 1992, Blondel and Delsart 1993. These measurements were performed at the end of 80's -beginning of 90's, and to the best of our knowledge no new experimental data on multiphoton detachment from the negative halogens have been published since.…”

Section: Introductionmentioning

confidence: 99%

“…(Gribakin and Kuchiev 1997a,b) with parameters corresponding to the corrected 2p wavefunction; -· · -, direct calculation using the HF wavefunctions of the 2p, intermediate and final states and experimental 2p-energy; --, same with the 2p wavefunction from the Dyson equation. Other results: , HF calculation of Crance (1987); ----, R-matrix Floquet approach (van der Hart 1996); ✷, and △ experiment Blondel et al (1989b) and Kwon et al (1989), respectively. Vertical line shows the position of the two-photon detachment threshold.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…As far as three-photon detachment from negative ions is concerned, the experimental and theoretical results are more scarce than those on the two-photon detachment. Thus, there have been only two experimental measurements of the cross section for F − at a single photon energy performed by Blondel et al (1989b) and Kwon et al (1989), and a few theoretical values obtained in the early calculations by Crance (1987Crance ( , 1988. Recently van der Hart (1996) applied an R-matrix Floquet approach to study the photodetachment from F − and Cl − for n = 1, 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Three-photon detachment of electrons from the fluorine negative ion

Gribakin

Ivanov

Korol

et al. 2000

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

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Abstract. Absolute three-photon detachment cross sections are calculated for the fluorine negative ion within the lowest-order perturbation theory. The Dyson equation of the atomic many-body theory is used to obtain the ground-state 2p wavefunction with correct asymptotic behaviour, corresponding to the true (experimental) binding energy. We show that in accordance with the adiabatic theory (Gribakin and Kuchiev 1997 Phys. Rev. A 55 3760) this is crucial for obtaining absolute values of the multiphoton cross sections. Comparisons with other calculations and experimental data are presented.

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Section: Resultsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Three-photon detachment of electrons from the fluorine negative ion

Gribakin

Ivanov

Korol

et al. 2000

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

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“…The mathematical model initially developed in 1973 [27] has been afterwards improved by Balling et al [30]. This saturation methodology has been also used to evaluate the absolute photo-detachment cross-section of trapped ions [31,32], or into the case of a three-photon set-up [33]. Several mathematical models have been proposed to modelize the saturation effect and to extract r from the measurements, as Cervenan and Isenor [34], considering immobile neutral species interacting with laser beam, or Boulassier [35], considering a gaussian profile interacting homogeneously distributed negative ions, or Blondel et al [33].…”

Section: Introductionmentioning

confidence: 99%

Photodetachment cross-section evaluation using asymptotic considerations

Babilotte

Vandevraye

2017

J Theor Appl Phys

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Mathematical calculations are given concerning the evaluation of the negative ions photodetachment crosssection r, into a so-called saturation regime. The interaction between a negative ion particle beam and a laser beam is examined under theoretical aspects. A quantitative criterion S is proposed to define the saturation threshold between the linear and the saturated domains, which are both present in this saturation regime. The asymptotic behaviours extracted at the low and high energy limits are used to determine this threshold quantitative criterion S and to evaluate also the photodetachment cross-section r. The case of a symmetric gaussian photodetachment laser beam shape is examined according to the proposed formalism, which can be used either for the photo-detachment or photo-ionization processes, and could be potentially used into technological solutions for negative ion neutralisation processes (such as neutral beam injector) in the future fusion energy devices. Estimations onto the errors related to the use of this methodology are given.

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Multiphoton electron detachment from H−: a model study

1992

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Summary. --N-photon cross-sections for the detachment of an electron from the hydrogen anion H-are evaluated by perturbation theory for 1 <~ N ~< 4 in terms of a one-electron model for the anion founded on the Fermi pseudopotential. Our results complement recent findings obtained in terms of a zero-range plane-wave approach to multiphoton detachment rates. Negative atomic ions, because of some peculiar features, are all the time attracting a lot of attention as a remarkable workbench for both experimental [1][2][3][4][5][6] and theoretical [7][8][9][10][11] multiphoton detachment (MPD) studies. This is particularly true for H- [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], whose one-electron affinity puts experimentalists in a position of detecting multiphoton absorption with light of rather small frequency [18,25], while the absence of bound intermediate states in its energy spectrum suggests to the theoreticians that the development of simple models [12,[15][16][17]20] could be a reasonably fruitful approach to the prediction of one-electron MPD behaviour. Further support to this latter remark is clearly offered also by the speculation that the ejected electron moves in a short-range potential generated by the parent neutral atom, a situation that can presumably be mimicked in some effective way.Recent data on MPD of electrons from H-anions [18,25] have been obtained by ingenious experiments where a relativistic H-beam is made to intersect a C02 laser beam at varying angles, so that the Doppler-shifted photon energy induces MPD processes associated with a variable (2 + 9) number of photons. Attempts of comparing these (fairly preliminary) data with the predictions of some theoretical models have already been reported [20][21][22][23]. By the present short paper we are being (*) The authors of this paper have agreed to not receive the proofs for correction. 463

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Single- and multiphoton detachment from storedF−ions

Cited by 33 publications

References 35 publications

Three-photon detachment of electrons from the fluorine negative ion

Three-photon detachment of electrons from the fluorine negative ion

Photodetachment cross-section evaluation using asymptotic considerations

Multiphoton electron detachment from H−: a model study

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