Single photon double and triple ionization of allene
Artikel i vetenskaplig tidskrift, 2022

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 H-3(+) 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.


Veronica Idebohn

Göteborgs universitet

Alistair J. Sterling

University of Oxford

Mans Wallner

Göteborgs universitet

Emelie Olsson

Göteborgs universitet

Richard J. Squibb

Göteborgs universitet

Ugne Miniotaite

Student vid Chalmers

Emma Forsmalm

Göteborgs universitet

Malin Forsmalm

Göteborgs universitet

Stefano Stranges

Sapienza, Università di Roma

Istituto Officina dei Materiali (CNR-IOM)

John M. Dyke

University of Southampton

Fernanda Duarte

University of Oxford

John H. D. Eland

University of Oxford

Raimund Feifel

Göteborgs universitet

Physical Chemistry Chemical Physics

1463-9076 (ISSN) 1463-9084 (eISSN)

Vol. 24 2 786-796


Atom- och molekylfysik och optik

Teoretisk kemi

Den kondenserade materiens fysik





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