Stability and Cooling of the C_{7}^{2-} Dianion

P. K. Najeeb, M. H. Stockett, E. K. Anderson, M. K. Kristiansson, P. Reinhed, A. Simonsson, S. Rosén, R. D. Thomas, K. C. Chartkunchand, H. Gnaser, R. Golser, D. Hanstorp, Å. Larson, H. Cederquist, H. T. Schmidt, H. Zettergren (Korresp. Autor*in)

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed


We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.

FachzeitschriftPhysical Review Letters
PublikationsstatusVeröffentlicht - 15 Sep. 2023

ÖFOS 2012

  • 103013 Ionenphysik