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.
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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14 January 2022
Ideböhn, Veronica
90e8fcfd-9478-4153-a8f1-df7f62e9ced2
Sterling, Alistair J.
86052bc8-c877-47cc-a21d-5dff7a5dd526
Wallner, Måns
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Olsson, Emelie
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Squibb, Richard J.
93d27e03-93d8-4f96-8118-4c34b0f458b9
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.
769970c1-d5c1-40db-b5dc-1ed588798097
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), .
(doi:10.1039/D1CP04666G).
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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OriginalMSAllene_article_PCCP
- Accepted Manuscript
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d1cp04666g
- Version of Record
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AlleneSupplementary Information_v4
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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.
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Local EPrints ID: 453493
URI: http://eprints.soton.ac.uk/id/eprint/453493
ISSN: 1463-9076
PURE UUID: 253478a4-9050-4678-8cd2-aea4273725ff
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Date deposited: 18 Jan 2022 17:40
Last modified: 17 Mar 2024 02:34
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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:
Fernanda Duarte
Author:
John H. D. Eland
Author:
Raimund Feifel
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