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Single photon double and triple ionization of allene

Single photon double and triple ionization of allene
Single photon double and triple ionization of allene
Double and triple ionization of allene are investigated using electron–electron, ion–ion, electron–electron–ion and electron–electron–ion–ion (ee, ii, eei, eeii) coincidence spectroscopies at selected photon energies. The results provide supporting evidence for a previously proposed roaming mechanism in H3+ formation by double ionization. The lowest vertical double ionization energy is found to be 27.9 eV, while adiabatic double ionization is not accessed by vertical ionization at the neutral geometry. The triple ionization energy is found to be close to 50 eV in agreement with theoretical predictions. The doubly charged parent ion is stable up to about 2 eV above the threshold, after which dissociations by charge separation and by double charge retention occur with comparable intensities. Fragmentation to H+ + C3H3+ starts immediately above the threshold as a slow (metastable) decay with 130.5 ± 9.9 ns mean lifetime.
1463-9076
786-796
Ideböhn, Veronica
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Sterling, Alistair J.
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Wallner, Måns
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Olsson, Emelie
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Squibb, Richard J.
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Miniotaite, Ugne
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Forsmalm, Emma
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Forsmalm, Malin
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Stranges, Stefano
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Dyke, John
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Duarte, Fernanda
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Eland, John H. D.
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Feifel, Raimund
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Ideböhn, Veronica
90e8fcfd-9478-4153-a8f1-df7f62e9ced2
Sterling, Alistair J.
86052bc8-c877-47cc-a21d-5dff7a5dd526
Wallner, Måns
7346e037-9444-4b7f-acb1-224dff4576b8
Olsson, Emelie
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Squibb, Richard J.
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Miniotaite, Ugne
f6df3f1f-50a2-47e6-a21d-bd53364b6da8
Forsmalm, Emma
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Forsmalm, Malin
d6aa9bfe-25da-4634-bef9-5281f25b64da
Stranges, Stefano
6083b375-8a6f-4456-b6bc-54d18f19244c
Dyke, John
46393b45-6694-46f3-af20-d7369d26199f
Duarte, Fernanda
c29bd605-fd19-42a8-938e-f298ad6cf811
Eland, John H. D.
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Feifel, Raimund
587151ce-e0e0-4bb4-aad8-6a2e2b4ca8f5

Ideböhn, Veronica, Sterling, Alistair J., Wallner, Måns, Olsson, Emelie, Squibb, Richard J., Miniotaite, Ugne, Forsmalm, Emma, Forsmalm, Malin, Stranges, Stefano, Dyke, John, Duarte, Fernanda, Eland, John H. D. and Feifel, Raimund (2022) Single photon double and triple ionization of allene. Physical Chemistry Chemical Physics, 24 (2), 786-796. (doi:10.1039/D1CP04666G).

Record type: Article

Abstract

Double and triple ionization of allene are investigated using electron–electron, ion–ion, electron–electron–ion and electron–electron–ion–ion (ee, ii, eei, eeii) coincidence spectroscopies at selected photon energies. The results provide supporting evidence for a previously proposed roaming mechanism in H3+ formation by double ionization. The lowest vertical double ionization energy is found to be 27.9 eV, while adiabatic double ionization is not accessed by vertical ionization at the neutral geometry. The triple ionization energy is found to be close to 50 eV in agreement with theoretical predictions. The doubly charged parent ion is stable up to about 2 eV above the threshold, after which dissociations by charge separation and by double charge retention occur with comparable intensities. Fragmentation to H+ + C3H3+ starts immediately above the threshold as a slow (metastable) decay with 130.5 ± 9.9 ns mean lifetime.

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Accepted/In Press date: 9 December 2021
e-pub ahead of print date: 9 December 2021
Published date: 14 January 2022
Additional Information: Funding Information: This work has been financially supported by the Swedish Research Council (VR) and the Knut and Alice Wallenberg Foundation, Sweden. A. J. S. thanks the EPSRC Centre for Doctoral Training in Synthesis for Biology and Medicine for a studentship (EP/L015838/1). We thank the Helmholtz Zentrum Berlin for the allocation of synchrotron radiation beam time and the staff of BESSY-II for smooth operation of the storage ring in single-bunch mode. The research leading to these results has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 730872. Funding Information: This work has been financially supported by the Swedish Research Council (VR) and the Knut and Alice Wallenberg Foundation, Sweden. A. J. S. thanks the EPSRC Centre for Doctoral Training in Synthesis for Biology and Medicine for a studentship (EP/L015838/1). We thank the Helmholtz Zentrum Berlin for the allocation of synchrotron radiation beam time and the staff of BESSY-II for smooth operation of the storage ring in single-bunch mode. The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 730872. Publisher Copyright: This journal is © the Owner Societies

Identifiers

Local EPrints ID: 453493
URI: http://eprints.soton.ac.uk/id/eprint/453493
ISSN: 1463-9076
PURE UUID: 253478a4-9050-4678-8cd2-aea4273725ff
ORCID for John Dyke: ORCID iD orcid.org/0000-0002-9808-303X

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Date deposited: 18 Jan 2022 17:40
Last modified: 06 Jun 2024 01:32

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Contributors

Author: Veronica Ideböhn
Author: Alistair J. Sterling
Author: Måns Wallner
Author: Emelie Olsson
Author: Richard J. Squibb
Author: Ugne Miniotaite
Author: Emma Forsmalm
Author: Malin Forsmalm
Author: Stefano Stranges
Author: John Dyke ORCID iD
Author: Fernanda Duarte
Author: John H. D. Eland
Author: Raimund Feifel

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