Post-collision interaction manifestation in molecular systems probed by photoelectron-molecular ion coincidences

Bomme, Cédric; Guillemin, R.; Sheinerman, S.; Marin, T.; Journel, L.; Marchenko, T.; Kushawaha, Rajesh K.; Trcera, Nicolas; Piancastelli, Maria Novella; Simon, M.

doi:10.1088/0953-4075/46/21/215101

Cited by 9 publications

(11 citation statements)

References 36 publications

(75 reference statements)

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“…The time of flight and impact positions of the electrons and ions detected in coincidence are recorded, and used to derive the three components of the momentum vector of each particle. The efficiency of this recently developed setup has been validated by a series of successful experiments that provided a quantity of new results such as the electronic relaxation of core-ionized argon [17], post-collision interaction [26,27], and molecularframe photoelectron angular distributions [28,29]. In this study, we did not take advantage of the full momentum measurement capability of the apparatus.…”

Section: A Experimentsmentioning

confidence: 99%

Interplay of complex decay processes after argon 1s ionization

et al. 2018

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Complex decay pathways involving radiative and nonradiative relaxation after deep core-level ionization in argon are disentangled by a unique combination of several synchrotron radiation-based spectroscopic techniques. In particular, by comparing the results obtained from electron-ion coincidence, photon-ion coincidence, and x-ray emission measurements, we are able to distinguish the final ionic states produced in the cascade decay involving Kα and Kβ radiative decay and final ionic states produced by nonradiative cascade decay. High-resolution Auger electron spectroscopy is then used as a complementary tool to identify the LMM transitions contributing to the cascade decay. Ab initio calculations are performed to identify the electronic states involved in the LMM decay.

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Section: A Experimentsmentioning

confidence: 99%

Interplay of complex decay processes after argon 1s ionization

et al. 2018

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“…In this case, another technique, namely slow photoelectron-selected ion coincidences, has allowed the observation of PCI distortion of photoelectrons associated with SA, DA, and multiple Auger (MA) decays of the inner shell vacancy. Such an approach was applied to the decays of the Ar 1s vacancy [3] and the S 1s vacancy in carbonyl sulfide (OCS) [11].…”

Section: Introductionmentioning

confidence: 99%

Postcollision interaction effects inKLLAuger spectra following argon1sphotoionization

et al. 2015

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Postcollision interaction effects on the Auger decay of a deep core hole are studied both experimentally and theoretically. KL 2,3 L 2,3 decay spectra of the Ar 1s vacancy are measured with high-energy resolution with excess photon energies ranging from 0 to 200 eV above the ionization threshold. Interaction of the Auger electron with the photoelectron and the ion field manifests itself in the Auger spectra as a distortion of the energy distribution of the Auger electron close to threshold. Moreover, recapture of the photoelectron due to energy exchange is dominating in the low-photon-energy range above threshold. The experimental results are compared with calculations based on the semiclassical approach to the postcollision interaction. The energies of the discrete levels and individual recapture cross sections are computed in the Hartree-Fock approximation. Good agreement is found between the calculated and experimental spectra, validating the model used.

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“…PCI is associated with the Coulomb interaction between the emitted electrons and the receding ion and strongly influences the energy distributions of the photoelectrons and the Auger electrons. PCI effects have largely been studied in processes where the initially created vacancy decays by means of single Auger decay [4][5][6] or double Auger decay [4,[7][8][9][10]].…”

Section: Introductionmentioning

confidence: 99%

Manifestation of postcollision interaction in Krypton LMN Auger spectra following K -shell photoionization

et al. 2022

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We report on an experimental and theoretical study of post-collision interaction (PCI) effects on L 2 − M 4,5 N 2,3 Auger electrons measured above the Kr K -edge in which L 2 vacancies are primarily generated by KL 2 x-ray emission. Such cascade processes, in which a deep inner-shell vacancy decays first by x-ray emission followed by Auger electron emission, is a strong decay mode in heavy atoms. The L 2 −M 4,5 N 2,3 Auger electron peak is observed to become increasingly asymmetric with a shifting peak maximum as the absorbed x-ray energy approaches the K -shell ionization threshold. This is attributed to PCI energy exchanges of the Auger electron with the 1s photoelectron.To model the PCI effects, we have applied a semiclassical approach modified to account for the combined lifetimes of the K and L 2 hole states. In addition, our analysis treats several closely spaced Auger transitions with final ionic states having different terms and angular momenta.

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Post-collision interaction manifestation in molecular systems probed by photoelectron-molecular ion coincidences

Cited by 9 publications

References 36 publications

Interplay of complex decay processes after argon 1s ionization

Interplay of complex decay processes after argon 1s ionization

Postcollision interaction effects inKLLAuger spectra following argon1sphotoionization

Manifestation of postcollision interaction in Krypton LMN Auger spectra following K -shell photoionization

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