Nondipole effects in soft X-ray photoemission

Hemmers, Oliver; Guillemin, R.; Lindle, Dennis W.

doi:10.1016/j.radphyschem.2003.12.009

Cited by 74 publications

(37 citation statements)

References 106 publications

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“…Accounting for (partial) coherence can modify the angular distribution due to other values of h(J i , J i ). However, we do not expect for the 2PDI (22), (23), where the intermediate ion polarization is small and smoothly depends on the photon energy (see below), significant changes in the behavior of the nondipole parameters in the noncoincidence experiments.…”

Section: Sequential 2pdi Of Neonmentioning

confidence: 69%

“…For this reason we concentrate in the present paper on the angular distribution of the photoelectrons e 2 . Figure 2 shows the parameters characterizing the angular distribution of the second electron e 2 in the sequential 2PDI (22), (23). The energy dependence of the dipole parameters β obtained in [12,13] is extended here to higher energies (two lower panels of figure 2).…”

Section: Sequential 2pdi Of Neonmentioning

confidence: 85%

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Non-dipole effects in the angular distribution of photoelectrons in sequential two-photon atomic double ionization

Grum-Grzhimailo¹,

Грызлова²,

Meyer³

2012

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

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Abstract. Motivated by the recent achievements of experiments using X-ray free electron lasers, we develop a theory for the angular distributions of photoelectrons in sequential two-photon double ionization (2PDI) of atoms beyond the dipole approximation. Expressions for the angular distributions are obtained taking into account the full multipole expansion of radiation in electric and magnetic moments. The formalism is further specified for the first-order corrections to the dipole approximation. As illustrative example, the sequential 2PDI of the 2p shell in atomic neon is studied. The numerical calculations predict distinct non-dipole effects observable in experiments at present X-ray Free Electron Lasers.

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Section: Sequential 2pdi Of Neonmentioning

confidence: 69%

Section: Sequential 2pdi Of Neonmentioning

confidence: 85%

Non-dipole effects in the angular distribution of photoelectrons in sequential two-photon atomic double ionization

Grum-Grzhimailo¹,

Грызлова²,

Meyer³

2012

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

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“…The resulting asymmetric peaks should permit obtaining information on the non-dipole parameters g and d (ref. 29).…”

Section: Resultsmentioning

confidence: 99%

Atomic Auger Doppler effects upon emission of fast photoelectrons

et al. 2014

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Studies of photoemission processes induced by hard X-rays including production of energetic electrons have become feasible due to recent substantial improvement of instrumentation. Novel dynamical phenomena have become possible to investigate in this new regime. Here we show a significant change in Auger emission following 1s photoionization of neon, which we attribute to the recoil of the Ne ion induced by the emission of a fast photoelectron. Because of the preferential motion of the ionized Ne atoms along two opposite directions, an Auger Doppler shift is revealed, which manifests itself as a gradual broadening and doubling of the Auger spectral features. This Auger Doppler effect should be a general phenomenon in high-energy photoemission of both isolated atoms and molecules, which will have to be taken into account in studies of other recoil effects such as vibrational or rotational recoil in molecules, and may also have consequences in measurements in solids.

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“…Its direction is produced randomly in 4π sr. In reality, photoelectrons are produced with specific angular distributions [14]. However, since they are rapidly thermalized by collisions, the results presented here are not sensitive to the details of their initial direction of motion.…”

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confidence: 91%