Spontaneous decay of small carbon cluster dianions ${{\rm{C}}}_{{}^{{\rm{n}}}}^{2-}$ (n=7-11)

P K Najeeb; M H Stockett; E K Anderson; G Eklund; M K Kristiansson; S Rosén; K C Chartkunchand; H Gnaser; R Golser; D Hanstorp; H Cederquist; H T Schmidt; H Zettergren

doi:10.1088/1742-6596/1412/23/232014

Journal of Physics: Conference Series

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Spontaneous decay of small carbon cluster dianions ${{\rm{C}}}_{{}^{{\rm{n}}}}^{2-}$ (n=7-11)

P K Najeeb¹, M H Stockett¹, E K Anderson¹, G Eklund¹, M K Kristiansson¹, S Rosén¹, K C Chartkunchand², H Gnaser³, R Golser⁴, D Hanstorp⁵, H Cederquist¹, H T Schmidt¹ and H Zettergren¹

Published under licence by IOP Publishing Ltd
Journal of Physics: Conference Series, Volume 1412, Storage ring Citation P K Najeeb et al 2020 J. Phys.: Conf. Ser. 1412 232014 DOI 10.1088/1742-6596/1412/23/232014

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najeeb.punnakayathil@fysik.su.se

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¹ Department of Physics, Stockholm University, AlbaNova, Stockholm, SE-106 91, Sweden

² AMO Physics Laboratory, RIKEN Advanced Science Institute, Saitama, 351-0198, Japan

³ Institut fur Oberflächen-und Schichtanalytik, Technische Universität Kaiserslautern, D-67663, Germany

⁴ Institute for Isotope Physics, University of Vienna, Vienna, A-1090, Austria

⁵ Department of Physics, Chalmers University of Technology and Göteborg University, S-412 96, Sweden

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Synopsis

We have studied the stabilities of small carbon dianion clusters, ${{\rm{C}}}_{{}^{{\rm{n}}}}^{2-}$ (n = 7 – 11) in the cryogenic electrostatic ion storage ring, DESIREE. We observe spontaneous electron emission for tens of milliseconds, where dianions containing an even number of carbons decay slower in comparison to their neighbouring cluster sizes. For all the systems considered here, we find that there is a component which is stable at least on the time scales of hundreds of milliseconds.

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Spontaneous decay of small carbon cluster dianions {{\rm{C}}}_{{}^{{\rm{n}}}}^{2-} (n=7-11)

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Synopsis

Spontaneous decay of small carbon cluster dianions ${{\rm{C}}}_{{}^{{\rm{n}}}}^{2-}$ (n=7-11)