Observation of an excited C2-4 ion
Journal article, 2004

This paper reports an experimental investigation of the electron impact detachment of C−4. We observe structure in the electron impact cross section for detaching a single electron from a C−4 cluster anion, which we attribute to the formation and decay of the C2−4 dianion. The system is energetically unstable and very rapidly decays via double autodetachment. The energy and width of the resonance were determined to be 8.8(5) eV and 1.4(5) eV, respectively, and the resonance lies 1.5(5) eV above the ground state of the neutral system. The experiment was conducted by merging monoenergetic electron and ion beams in the heavy ion storage ring CRYRING. The detachment channel was monitored by detecting neutral C4 fragments.


Karin Fritioff

University of Gothenburg

Joakim Sandström

University of Gothenburg

Chalmers, Department of Experimental Physics, Atomic Physics

Pontus Andersson

University of Gothenburg

Dag Hanstorp

University of Gothenburg

F. Hellberg

Stockholm University

R Thomas

Stockholm University

M Larsson

Stockholm University

F Österdahl

Royal Institute of Technology (KTH)

G. F. Collins

Queen's University Belfast

A. Le Padellec

Universite Paul Sabatier Toulouse III

D. J. Pegg

University of Tennessee

N. D. Gibson

Denison University

H Danared

Manne Siegbahn Laboratory

A Källberg

Manne Siegbahn Laboratory

Journal of Physics B: Atomic, Molecular and Optical Physics

0953-4075 (ISSN)

Vol. 37 11 2241-2246

Subject Categories

Atom and Molecular Physics and Optics



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