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Akademický článek

Acetylacetone photodynamics at a seeded free-electron laser

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)

The first steps in photochemical processes involve changes in electronic and geometric structure on extremely short timescales. Here, the authors report femtosecond dynamics in prototypical acetylacetone, by pump-probe photoexcitation-photoemission e

Externí odkaz: https://doaj.org/article/c44113b9e3f048fa8921c959f103ef60

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Akademický článek

Inner-Shell-Ionization-Induced Femtosecond Structural Dynamics of Water Molecules Imaged at an X-Ray Free-Electron Laser

Publikováno v: Physical Review X, Vol 11, Iss 4, p 041044 (2021)

The ultrafast structural dynamics of water following inner-shell ionization is a crucial issue in high-energy radiation chemistry. We have exposed isolated water molecules to a short x-ray pulse from a free-electron laser and detected momenta of all

Externí odkaz: https://doaj.org/article/9870d37191d94df5a2e9ba4285214048

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Akademický článek

Unified treatment of recoil and Doppler broadening in molecular high-energy photoemission

Autor: E Kukk, D Céolin, O Travnikova, R Püttner, M N Piancastelli, R Guillemin, L Journel, T Marchenko, I Ismail, J Martins, J-P Rueff, M Simon

Publikováno v: New Journal of Physics, Vol 23, Iss 6, p 063077 (2021)

Doppler and recoil effects are an integral part of the photoemission process at the high kinetic energies reached in hard x-ray photo-electron spectroscopy (HAXPES) and have a major effect on the observed lineshape, resulting in broadening, energy lo

Externí odkaz: https://doaj.org/article/67026f696486447db9a5ddc4f68935c9

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Concerted and sequential three-body fragmentation of deep-core-ionized carbon disulfide

Autor: R. Guillemin, T. Marin, M. Zmerli, C. Bomme, I. Ismail, L. Journel, T. Marchenko, O. Travnikova, M. N. Piancastelli, M. Simon

Publikováno v: Physical chemistry chemical physics : PCCP. 25(1)

Momentum vector correlation is a powerful tool to study molecular dissociation. We have studied the three-body fragmentation of carbon disulfide after sulfur 1s photoionization by means of momentum imaging techniques. Concerted and sequential pathway

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5a357aabc9da14911b114a30bb5c311
https://pubmed.ncbi.nlm.nih.gov/36484232

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Akademický článek

Hard x-ray photoelectron spectroscopy on heavy atoms and heavy-element containing molecules using synchrotron radiation up to 35 keV at SPring-8 undulator beamlines

Autor: M Oura, T Gejo, K Nagaya, Y Kohmura, K Tamasaku, L Journel, M N Piancastelli, M Simon

Publikováno v: New Journal of Physics, Vol 21, Iss 4, p 043015 (2019)

We have recently initiated hard x-ray photoelectron spectroscopy experiments on heavy atoms and heavy-element containing molecules in gas phase by using synchrotron radiation up to 35 keV at SPring-8 undulator beamlines. We have successfully measured

Externí odkaz: https://doaj.org/article/a3b141d22e1c4cb386bd4049a467e216

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Simulation of Auger decay dynamics in the hard X-ray regime: HCl as a showcase

Autor: G. Goldsztejn, R. Guillemin, T. Marchenko, O. Travnikova, D. Céolin, L. Journel, M. Simon, M. N. Piancastelli, R. Püttner

Publikováno v: Physical chemistry chemical physics : PCCP. 24(11)

Auger decay after photoexcitation or photoemission of an electron from a deep inner shell in the hard X-ray regime can be rather complex, implying a multitude of phenomena such as multiple-step cascades, post-collision interaction (PCI), and electron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4844ba1c3e7a9b6c6c5207c4eec7f188
https://pubmed.ncbi.nlm.nih.gov/35234229

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Postcollision-interaction effects in multistep Auger transitions following Ar 1s photoionization

Autor: S. Kosugi, R. Guillemin, O. Travnikova, T. Marchenko, D. Koulentianos, J. B. Martins, F. Hosseini, R. Püttner, D. Céolin, L. Journel, M. N. Piancastelli, I. Ismail, F. Koike, M. Iizawa, S. Sheinerman, L. Gerchikov, Y. Azuma, M. Simon

Postcollision-interaction (PCI) effects involving multistep decay processes following Ar 1s photoionization has been studied by Auger electron spectroscopy. The experiment focused on LMM Auger electrons measured in small photon energy steps across th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d10e6f137a642c1871ffd99e6db42a4f

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Akademický článek

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The O K

Autor: D, Koulentianos, S, Carniato, R, Püttner, J B, Martins, O, Travnikova, T, Marchenko, L, Journel, R, Guillemin, I, Ismail, D, Céolin, M N, Piancastelli, R, Feifel, M, Simon

Publikováno v: Physical chemistry chemical physics : PCCP. 23(18)

Using synchrotron radiation in the tender X-ray regime, a photoelectron spectrum showing the formation of single site double-core-hole pre-edge states, involving the K shell of the O atom in CO, has been recorded by means of high-resolution electron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::bc89a637b05659df7ddc1bf4749bab24
https://pubmed.ncbi.nlm.nih.gov/33908498

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