Negative ion relaxation and reactions in a cryogenic storage ring Article Swipe

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H. T. Schmidt , Stefan Rosén , Richard Thomas , Mark H. Stockett , W. D. Geppert , Åsa Larson , P. Löfgren , A. Simonsson , A. Källberg , P. Reinhed , M. Björkhage , Mikael Blom , John Alexander , P K Najeeb , MingChao Ji , N. Kono , E. K. Anderson , Gustav Eklund , M. K. Kristiansson , O. M. Hole , D. Hanstorp , H. Hartman , P. S. Barklem , Jon Grumer , Klavs Hansen , Michael Gatchell , H. Cederquist , Henning Zettergren ·

YOU? · · 2020 · Open Access · · DOI: https://doi.org/10.1088/1742-6596/1412/6/062006 · OA: W3034636926

An overview of recent experimental results of studies of negative atomic and molecular ions in the Double ElectroStatic Ion-Ring ExpEriment, DESIREE is given. Metastable level lifetimes in atomic negative ions have been measured by time-dependent laser photodetachment. Rotational relaxation of diatomic anions is studied by near-threshold photodetachment. Spontaneous decays of small metal cluster anions by electron emission and fragmentation is studied with decay-channel specificity. Finally, mutual neutralisation of pairs of negative and positive ions has been investigated with initial and final state selectivity.