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

Autor(en)

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

Abstrakt

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.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Stockholm University, RIKEN, University of Gothenburg

Journal

Physical Review Letters

Band

131

Anzahl der Seiten

6

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.131.113003

Publikationsdatum

09-2023

Peer-reviewed

Ja

ÖFOS 2012

103013 Ionenphysik

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/9ec94667-b4cf-4ee6-8751-4767ad10649b