Observation of an excited C2-4 ion
Artikel i vetenskaplig tidskrift, 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.
Författare
Karin Fritioff
Göteborgs universitet
Joakim Sandström
Göteborgs universitet
Chalmers, Institutionen för experimentell fysik, Atomfysik
Pontus Andersson
Göteborgs universitet
Dag Hanstorp
Göteborgs universitet
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 2241-2246Ämneskategorier (SSIF 2011)
Atom- och molekylfysik och optik
DOI
10.1088/0953-4075/37/11/002