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.
Författare
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 2 786-796Ämneskategorier (SSIF 2011)
Atom- och molekylfysik och optik
Teoretisk kemi
Den kondenserade materiens fysik
DOI
10.1039/d1cp04666g
PubMed
34927639