Evolution of the Post-Collision-Interaction Profile from the Resonant Auger Shakeup<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>/</mml:mi></mml:math>Shakedown Lines at the Ionization Threshold

Aksela, H.; Kivilompolo, Mika; Nõmmiste, E.; Aksela, S.

doi:10.1103/physrevlett.79.4970

Cited by 64 publications

(50 citation statements)

References 30 publications

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“…Weak population of other 4p −2 ( 1 S)nl Rydberg series can also be noticed. This is in very good quantitative agreement with the observation of Aksela et al (Aksela 1997) upon 3d 5/2 → 9p excitation. The calculated spectrum in Fig 9b reproduces qualitatively the main experimental features: intensities differ slightly due to the limitations of the HF model described above, but the position of the Rydberg series is well predicted.…”

Section: Comparison Of Calculated and Measured Spectrasupporting

confidence: 92%

Dynamics of electron emission in double photoionization processes near the krypton 3d threshold

Penent

Sheinerman

Andrić

et al. 2008

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

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Abstract.Two electron emission following photoabsorption near the Kr 3d threshold is investigated both experimentally and theoretically. On the experimental side, electron / electron coincidences using a magnetic bottle time of flight spectrometer allow us to observe the complete Double Photo Ionisation (DPI) continua of selected Kr 2+ final states, and to see how these continua are affected by resonant processes in the vicinity of the Kr 3d threshold. The analysis is based on a quantum mechanical approach that takes into account the contribution of three different processes: A) Auger decay of the inner 3d vacancy with the associated post collision interaction (PCI) effects, B) capture of slow photoelectrons into discrete states followed by valence multiplet decay (VMD) of the excited ionic states and C) valence shell DPI. The dominant process for each Kr 2+ (4p −2 ) final state is the photoionization of the inner shell followed by Auger decay of the 3d vacancies. Moreover, for the 4p −2 ( 3 P ) and 4p −2 ( 1 D) final ionic states an important contribution comes from the processes of slow photoelectron capture followed by VMD as well as from double ionization of the outer shell involving also VMD.Confidential: not for distribution.

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Section: Comparison Of Calculated and Measured Spectrasupporting

confidence: 92%

Dynamics of electron emission in double photoionization processes near the krypton 3d threshold

Penent

Sheinerman

Andrić

et al. 2008

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

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“…The equations of motion (13), (14), and (16) are solved utilizing a fourth-order Runge-Kutta integrator. Before the interaction with an x-ray pulse, the atom is assumed to be in its neutral ground state.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Since its discovery in 1980 [1], the resonant Auger effect [2,3] and its influence on various experimental observables have been the subject of intense investigation [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In a simple picture, the resonant Auger effect may be interpreted as a resonant photoionization process mediated by a particle-hole configuration involving an inner-shell hole and an excited electron in a discrete one-electron state.…”

Section: Introductionmentioning

confidence: 99%

Resonant Auger effect at high x-ray intensity

Rohringer

Santra

2008

Phys. Rev. A

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The resonant Auger effect of atomic neon exposed to high-intensity x-ray radiation in resonance with the 1s → 3p transition is discussed. High intensity here means that the x-ray peak intensity is sufficient (∼ 10 18 W/cm 2 ) to induce Rabi oscillations between the neon ground state and the 1s −1 3p ( 1 P ) state within the relaxation lifetime of the inner-shell vacancy. For the numerical analysis presented, an effective two-level model, including a description of the resonant Auger decay process, is employed. Both coherent and chaotic x-ray pulses are treated. The latter are used to simulate radiation from x-ray free-electron lasers based on the principle of self-amplified spontaneous emission. Observing x-ray-driven atomic population dynamics in the time domain is challenging for chaotic pulse ensembles. A more practical option for experiments using x-ray free-electron lasers is to measure the line profiles in the kinetic energy distribution of the resonant Auger electron. This provides information on both atomic population dynamics and x-ray pulse properties.

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“…Observation of shake-down lines in photoionization [10][11][12][13] and resonant Auger decay [14,15] have been reported in the past, but to the best of our knowledge, this is the first time when shake-down lines are unambiguously identified in normal Auger decay process.…”

Section: Introductionmentioning

confidence: 98%

“…Qualitatively the process can be understood so that the energy released by the n → n shake-down during the Auger process is taken by the emitted Auger electron − a , which appears higher in kinetic energy than the electrons from decays in which shake-down did not occur. Shake-down processes have been observed in photoionization of laser excited atoms (e.g., [10][11][12][13]) and resonant Auger decay [14,15], which by nature are more initial state selective and have thus less overlapping spectral features than normal Auger decays. To our knowledge this is the first time shake-down lines associated with normal Auger decay have been identified with certainty.…”

Section: B Shake-down Transitionsmentioning

confidence: 99%

Initial-state-selected MNN Auger spectroscopy of atomic rubidium

et al. 2017

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The M 4,5 N 2,3 N 2,3 and M 4,5 N 1 N 2,3 Auger decay of atomic Rb have been studied by using photoelectron-Auger electron coincidence measurements that enable initial ionic state selected Auger spectroscopy. The Auger spectra in the present study are separated by the total angular momentum j of the 3d hole and the orbital of the valence electron n after photoionization. It is shown that the technique allows isolating overlapping features and the study of otherwise unobservable spectral details, from which the presence of shake-down transitions during normal Auger decay is demonstrated experimentally. The technique allows also probing the effects of initial state parity and electron correlation in Auger electron spectroscopy. The observed spectral features are interpreted with theoretical predictions obtained from configuration interaction Dirac-Fock approach.

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Evolution of the Post-Collision-Interaction Profile from the Resonant Auger Shakeup/Shakedown Lines at the Ionization Threshold

Cited by 64 publications

References 30 publications

Dynamics of electron emission in double photoionization processes near the krypton 3d threshold

Dynamics of electron emission in double photoionization processes near the krypton 3d threshold

Resonant Auger effect at high x-ray intensity

Initial-state-selected MNN Auger spectroscopy of atomic rubidium

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