Observation of an excited C2-4 ion
Journal article, 2004
This paper reports an experimental investigation of the electron impact detachment of Cā4. We observe structure in the electron impact cross section for detaching a single electron from a Cā4 cluster anion, which we attribute to the formation and decay of the C2ā4 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.
Author
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
Stockholms universitet
R Thomas
Stockholms universitet
M Larsson
Stockholms universitet
F Österdahl
The 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, Knoxville
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 2241-2246Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
DOI
10.1088/0953-4075/37/11/002