One- and two-electron photoejection from<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:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>: A multichannel<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi></mml:math>-matrix calculation

Broad, John T.; Reinhardt, William P.

doi:10.1103/physreva.14.2159

Cited by 219 publications

(98 citation statements)

References 50 publications

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“…The simple analytic results for the parameters β 2 ≡ β (2) 2 and β 4 ≡ β (2) 4 easily follow from equations (49), (72) and (73): (1) and σ (2) , and estimated an upper limit for σ (3) . The n-photon detachment cross Theory [151] section, σ (n) , is connected with the partial decay rate, (n) , in the standard way,…”

Section: Comparisons With Recent Experiments and Multielectron Calculmentioning

confidence: 99%

Multiphoton detachment of a negative ion by an elliptically polarized, monochromatic laser field

Manakov

Frolov

Borca

et al. 2003

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

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The quasistationary quasienergy state approach (QQES) is applied to the analysis of partial (n-photon) decay rates and angular distributions (ADs) of photoelectrons produced by an elliptically polarized laser field. The problem is formulated for a weakly bound electron with an energy E 0 in the threedimensional δ-model potential (which approximates the short-range potential of a negative ion) interacting with a strong monochromatic laser field having an electric vector F (ωt). The results presented cover weak (perturbative), strong (nonperturbative), and superstrong field regimes as well as a wide interval of frequencies ω extending from the tunnelling (hω |E 0 |) and multiphoton (hω < |E 0 |) cases up to the high frequency domain (hω > |E 0 |).For a weak laser field, exact equations for the normalization factor and for the Fourier coefficients of the QQES wavefunction at the origin (|r| → 0) (that are key elements of the QQES approach for a δ-model potential) as well as for the detachment amplitudes are analysed analytically using both standard RayleighSchrödinger perturbation theory (PT) in the intensity, I , of the laser field and Brillouin-Wigner PT expansions involving the exact (complex) quasienergy . The lowest-order perturbative results for the n-photon ADs are presented in analytic form, and the parametrization of ADs in terms of polarization-and angular-independent atomic parameters is discussed for the general case of elliptical polarization. The major emphasis is on the analysis of an ellipticity induced distortion of three-dimensional ADs and, especially, on the elliptic dichroism (ED) effect, i.e. the dependence of the photoelectron yield in a fixed direction n on the sign of the ellipticity (or on the helicity) of a laser field. The dominant role of binding potential effects for a correct description of ED and threshold effects is demonstrated, and the intimate relationship between atomic ED factors and scattering phases of the detached electron is established for multiphoton detachment, including the above-threshold case. For a strong laser field, we present an accurate derivation for the QQES wavefunction and decay rates in the Keldysh approximation (KA) from exact QQES equations, including analytical, first-order ('rescattering') corrections to the KA results. The symmetries of ADs and the existence of ED are established using the exact analytical result for the n-photon detachment amplitude. Accurate numerical results are presented for the variation of the structure of the ADs as well as of the ED effect with increasing laser intensity.For the high frequency case,hω > |E 0 |, a rigorous analytical treatment of higher-order PT effects is presented for one-photon detachment, taking into account corrections of higher orders in I to the well-known photodetachment cross section for a short-range potential. Together with the exact numerical analysis of the total and partial decay rates forhω > |E 0 |, these results demonstrate the existence of a quasistationary stabilization regime in the de...

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Section: Comparisons With Recent Experiments and Multielectron Calculmentioning

confidence: 99%

Multiphoton detachment of a negative ion by an elliptically polarized, monochromatic laser field

Manakov

Frolov

Borca

et al. 2003

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

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“…Numerous theoretical approaches have been applied to double photoionization of H − , dating back to a multichannel J-matrix calculation by Broad and Reinhardt [37]. Since then, the problem has been treated by model calculations [38,39], variationally [40], R-matrix methods [41], convergent close-coupling [42], time dependent close-coupling [43], and most recently by wavepacket propagation [44].…”

Section: Introductionmentioning

confidence: 99%

Single and triple differential cross sections for double photoionization ofH−

et al. 2007

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The hydride anion H − would not be bound in the absence of electron correlation. Electron correlation drives the double photoionization process and, thus should impact double photoionization results most strongly for H − . We present fully differential cross sections for the three-body breakup of H − by single photon absorption. The absolute triple-differential and single-differential cross sections were yielded by ab initio calculations making use of exterior complex scaling within a discrete variable representation partial wave basis. Results calculated at photon energies of 18eV and 30eV are compared with reported cross sections for helium calculated at 20eV above the double ionization threshold. These comparisons show a clear signature of initial state correlation that differentiate the He and H − cases.

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“…[40], process (1 7) is substantially a direct excitation process. Figure 13 compares the adiabatic hyperspherical results [40] for the total n = 2 cross section with predictions of Hyman, Jacobs, and Burke (441, Broad and Reinhard t [45], and Wishart [46]. The 1s-2s-2p close-coupling calculatiori of flyman, Jacobs, and Burke (441 gives the lowest, broadest, and highest energy prediction for the shape resonance feature.…”

Section: Photodetachment Of 11-with Excitation Of H(n=2)mentioning

confidence: 99%

Hyperspherical Coordinate Description of Single- and Multiphoton Processes in Two-electron Systems

Starace¹

1993

Many-Body Theory of Atomic Structure and Photoionization

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One- and two-electron photoejection fromH−: A multichannelJ-matrix calculation

Cited by 219 publications

References 50 publications

Multiphoton detachment of a negative ion by an elliptically polarized, monochromatic laser field

Multiphoton detachment of a negative ion by an elliptically polarized, monochromatic laser field

Single and triple differential cross sections for double photoionization ofH−

Hyperspherical Coordinate Description of Single- and Multiphoton Processes in Two-electron Systems

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