A comprehensive study of the vibrationally resolved S 2<i>p</i>−1 Auger electron spectrum of carbonyl sulfide

Sekushin, V.; Püttner, R.; Fink, Reinhold F.; Martins, M.; Jiang, Yuhai; Aksela, H.; Aksela, S.; Kaindl, G.

doi:10.1063/1.4734310

Cited by 9 publications

(6 citation statements)

References 45 publications

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“…Subsequent studies on H 2 S investigated this behavior in more detail, both by experiments and theory [11][12][13]. Since this pioneering work by Svensson et al [7] the Auger decay of molecular-field split states has been studied in a number of additional molecules, including Cl 2 [14], OCS [15,10], CS 2 [16], as well as the hydrogen halides HCl [9,17] and HBr [18]. As will be discussed in more detail further below, the 3d −1 Auger decay of HBr resembles the behavior found by Svensson et al [7] in several but not all transitions, which motivated the present investigation.…”

Section: Introductionmentioning

confidence: 99%

Selectivity of the Br 3d−1 Auger decays in HBr

et al. 2018

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The Auger decay of the spin-orbit and molecular-field split Br 3d −1 core holes in HBr is investigated, both by a photoelectron-Auger-electron coincidence experiment and by ab initio calculations based on the one-center approximation. The branching ratios for the Auger decay of the five different core-hole states to the 4p(σ, π) −2 dicationic final states are determined. Experimental and theoretical data are in good agreement and conform to results for the 4pπ −2 final states from a previous analysis of the high-resolution conventional Auger-electron spectrum. The branching ratios for the Br 3d −1 Auger decay to the 4p(σ, π) −2 with symmetry follow the propensity rule of L 2,3

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Section: Introductionmentioning

confidence: 99%

Selectivity of the Br 3d−1 Auger decays in HBr

et al. 2018

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“…The recent availability of new sources of intense hard Xray radiation (10-15) will make it possible to study polyatomic molecules with higher moment of inertia and to reach a regime in which the molecule has the time to perform full rotations during the core-hole lifetime. We wish to point out that the main requirement to observe rotational recoil in pure form is the presence of isolated vibrational states in the Auger transitions, which are already known to exist in several triatomic molecules [e.g., CO2 (31), H2S (32), and OCS (33)]. In addition, such vibrationally resolved Auger spectra can also be expected for other polyatomic molecules (e.g., CS2, N2O, SO2, C2H2, C2N2, and C6H6) (34)(35)(36)(37).…”

Section: Discussionmentioning

confidence: 99%

Recoil-induced ultrafast molecular rotation probed by dynamical rotational Doppler effect

Céolin

Liu

Cruz

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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Observing and controlling molecular motion and in particular rotation are fundamental topics in physics and chemistry. To initiate ultrafast rotation, one needs a way to transfer a large angular momentum to the molecule. As a showcase, this was performed by hard X-ray C1s ionization of carbon monoxide accompanied by spinning up the molecule via the recoil “kick” of the emitted fast photoelectron. To visualize this molecular motion, we use the dynamical rotational Doppler effect and an X-ray “pump-probe” device offered by nature itself: the recoil-induced ultrafast rotation is probed by subsequent Auger electron emission. The time information in our experiment originates from the natural delay between the C1s photoionization initiating the rotation and the ejection of the Auger electron. From a more general point of view, time-resolved measurements can be performed in two ways: either to vary the “delay” time as in conventional time-resolved pump-probe spectroscopy and use the dynamics given by the system, or to keep constant delay time and manipulate the dynamics. Since in our experiment we cannot change the delay time given by the core-hole lifetime τ, we use the second option and control the rotational speed by changing the kinetic energy of the photoelectron. The recoil-induced rotational dynamics controlled in such a way is observed as a photon energy-dependent asymmetry of the Auger line shape, in full agreement with theory. This asymmetry is explained by a significant change of the molecular orientation during the core-hole lifetime, which is comparable with the rotational period.

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“…The effect of the nuclear motion on the Auger transitions has been theoretically studied [17]. Recently, a high-resolution S2p Auger spectrum, and assignments to metastable states on the basis of a theoretical calculation have been reported [7]. Meanwhile, Auger-electron-ion coincidence experiments have been performed only for S2p core-hole creation, and reported in our previous work [18], and later in [19].…”

Section: Introductionmentioning

confidence: 99%

“…The molecular dications thus formed either show metastable character or rapidly dissociate into fragments, depending on the properties of their potential surfaces. Auger electron spectroscopy can provide information on the stability and dissociation properties of the molecular dications [6,7]. However it is usually difficult to derive detailed dication dynamics from molecular Auger spectra, due to the many overlapping Auger transitions, most of which produce dissociative dication states leading to broad spectral shapes.…”

Section: Introductionmentioning

confidence: 99%

Site-specific formation of metastable OCS²⁺studied by Auger-electron-ion coincidence method

Kaneyasu

Ito

Soejima

et al. 2015

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

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We have studied the site-specific formation of metastable OCS 2+ in the C1s and the O1s Auger decays of OCS molecules by using an Auger-electron-ion coincidence technique. The coincidence measurement reveals the metastable character of the Auger final states with the (3π) −2 configuration. The formation of metastable OCS 2+ is observed negligibly in the C1s Auger decay and only weakly in the O1s Auger decay, in contrast to the favorable metastable formation previously reported for S2p Auger decay. It is found that the origin of the sitespecificity in the formation of metastable OCS 2+ arises from the localization effect of the valence orbital involved in the Auger transition. The dissociative dication states related to individual fragmentation pathways are also derived from the coincidence measurement.

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A comprehensive study of the vibrationally resolved S 2p−1 Auger electron spectrum of carbonyl sulfide

Cited by 9 publications

References 45 publications

Selectivity of the Br 3d−1 Auger decays in HBr

Selectivity of the Br 3d−1 Auger decays in HBr

Recoil-induced ultrafast molecular rotation probed by dynamical rotational Doppler effect

Site-specific formation of metastable OCS²⁺studied by Auger-electron-ion coincidence method

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A comprehensive study of the vibrationally resolved S 2p−1 Auger electron spectrum of carbonyl sulfide

Cited by 9 publications

References 45 publications

Selectivity of the Br 3d−1 Auger decays in HBr

Selectivity of the Br 3d−1 Auger decays in HBr

Recoil-induced ultrafast molecular rotation probed by dynamical rotational Doppler effect

Site-specific formation of metastable OCS2+studied by Auger-electron-ion coincidence method

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Site-specific formation of metastable OCS²⁺studied by Auger-electron-ion coincidence method