https://dx.doi.org/10.1063/1.5028393">
 

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This work is licensed under a Creative Commons Attribution 4.0 License.

Abstract

The smallest doubly charged coronene cluster ions reported so far, Cor152+, were produced by charge exchange between bare coronene clusters and He2+ [H. A. B. Johansson et al., Phys. Rev. A 84, 043201 (2011)]. These dications are at least five times larger than the estimated Rayleigh limit, i.e., the size at which the activation barrier for charge separation vanishes. Such a large discrepancy is unheard of for doubly charged atomic or molecular clusters. Here we report the mass spectrometric observation of doubly charged coronene trimers, produced by electron ionization of helium nanodroplets doped with coronene. The observation implies that Cor32+ features a non-zero fission barrier too large to overcome under the present experimental conditions. The height of the barriers for the dimer and trimer has been estimated by means of density functional theory calculations. A sizeable barrier for the trimer has been revealed in agreement with the experimental findings.

Department

Physics

Publication Date

5-2-2018

Journal Title

The Journal of Chemical Physics

Publisher

AIP

Digital Object Identifier (DOI)

https://dx.doi.org/10.1063/1.5028393

Document Type

Article

Comments

This is an article published by AIP in The Journal of Chemical Physics in 2018, available online: https://dx.doi.org/10.1007/s13361-018-02124-z

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