Probing spin-orbit-interaction-induced electron dynamics in the carbon atom by multiphoton ionization

Rey, H. F.; Hart, H. W. van der

doi:10.1103/physreva.90.033402

Cited by 10 publications

(15 citation statements)

References 21 publications

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“…The two methods can therefore explore the influence of a different set of interactions on the electron dynamics. Through the inclusion of correlation orbitals, the RMT approach has the capability to obtain an accurate description of the dynamics of open-shell systems as well as closed-shell systems [12,13,18,19]. The capability to account for correlation in both the initial and residual ionic system is critical for this accuracy.…”

Section: Time-dependent R-matrix Theorymentioning

confidence: 99%

Harmonic generation by noble-gas atoms in the near-IR regime usingab initiotime-dependentR-matrix theory

2014

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We demonstrate the capability of ab-initio time-dependent R-matrix theory to obtain accurate harmonic generation spectra of noble-gas atoms at Near-IR wavelengths between 1200 and 1800 nm and peak intensities up to 1.8 × 10 14 W/cm 2 . To accommodate the excursion length of the ejected electron, we use an angular-momentum expansion up to Lmax = 279. The harmonic spectra show evidence of atomic structure through the presence of a Cooper minimum in harmonic generation for Kr, and of multielectron interaction through the giant resonance for Xe. The theoretical spectra agree well with those obtained experimentally.

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Section: Time-dependent R-matrix Theorymentioning

confidence: 99%

Harmonic generation by noble-gas atoms in the near-IR regime usingab initiotime-dependentR-matrix theory

2014

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“…Several such methods have been developed in recent years, such as the time-dependent configuration-interaction singles (TDCIS) method, which has recently been applied to study above-threshold ionization for light elements in the hard x-ray regime [7]; a Green's function technique, algebraic diagrammatic construction (ADC), which has been applied to study fast dynamics in glycine using laser pulses at a photon energy of 275 eV [8]; and time-dependent R-matrix theory, which has been used to study the competition between emission of a 2s and a 2p electron in C in the UV regime [9]. * hreypereira01@qub.ac.uk…”

Section: Introductionmentioning

confidence: 99%

Multiphoton inner-shell ionization of the carbon atom

Rey

Hart

2015

Phys. Rev. A

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We apply time-dependent R-matrix theory to study inner-shell ionization of C atoms in ultrashort highfrequency light fields with a photon energy between 170 and 245 eV. At an intensity of 10 17 W/cm 2 , ionization is dominated by single-photon emission of a 2 electron, with two-photon emission of a 1s electron accounting for about 2-3% of all emission processes, and two-photon emission of 2 contributing about 0.5-1%. Three-photon emission of a 1s electron is estimated to contribute about 0.01-0.03%. Around a photon energy of 225 eV, two-photon emission of a 1s electron, leaving C + in either 1s2s2p 3 or 1s2p 4 , is resonantly enhanced by intermediate 1s2s 2 2p 3 states. The results demonstrate the capability of time-dependent R-matrix theory to describe inner-shell ionization processes including rearrangement of the outer electrons.

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“…We use the assumption (similar to that used in Ref. [9] and key to the experimental method of Refs. [7,8]) that removal of m = 0 electrons dominates both the photodetachment (pump) and subsequent photoionization (probe), and consider the motion of the np 2 3 P fine-structure wave packet in C, Si, or Ge.…”

Section: Introductionmentioning

confidence: 99%

“…This showed that electron dynamics resulting from the spin-orbit interaction could be observed for both lighter and heavier * g.gribakin@qub.ac.uk atoms. In a recent paper [9] Rey and van der Hart used R-matrix theory with time dependence (RMT) to model the experiment of Refs. [7,8].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of atomic spin-orbit-state wave packets produced by short-pulse laser photodetachment

Law

Gribakin

2016

Phys. Rev. A

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We analyse the experiment by Hultgren et al. [Phys. Rev. A 87, 031404 (2013)] on orbital alignment and quantum beats in coherently excited atomic fine-structure manifolds produced by short-pulse laser photodetachment of C − , Si − and Ge − negative ions, and derive a formula that describes the beats. Analysis of the experimental data enables us to extract the non-coherent background contribution for each species, and indicates the need for a full density matrix treatment of the problem.

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Probing spin-orbit-interaction-induced electron dynamics in the carbon atom by multiphoton ionization

Cited by 10 publications

References 21 publications

Harmonic generation by noble-gas atoms in the near-IR regime usingab initiotime-dependentR-matrix theory

Harmonic generation by noble-gas atoms in the near-IR regime usingab initiotime-dependentR-matrix theory

Multiphoton inner-shell ionization of the carbon atom

Dynamics of atomic spin-orbit-state wave packets produced by short-pulse laser photodetachment

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