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Observation of an excited C2-4 ion

Karin Fritioff ; Joakim Sandström (Institutionen för experimentell fysik, Atomfysik ; Institutionen för fysik (GU)) ; Pontus Andersson ; Dag Hanstorp ; F. Hellberg ; R. Thomas ; M. Larsson ; F. Osterdahl ; G. F. Collins ; A. Le Padellec ; D. J. Pegg ; N. D. Gibson ; H. Danared ; A. Kaillberg
Journal of Physics B: Atomic, Molecular and Optical Physics (0953-4075). Vol. 37 (2004), 11, p. 2241-2246.
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2007-10-24. Senast ändrad 2013-07-17.
CPL Pubid: 57307


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Institutioner (Chalmers)

Institutionen för fysik (GU) (GU)
Institutionen för experimentell fysik, Atomfysik (1997-2005)


Atom- och molekylfysik och optik

Chalmers infrastruktur