APS » PROLA » Phys. Rev. Lett. » Volume 91 » Issue 13

Phys. Rev. Lett. 91, 133401 (2003) [4 pages]

Probing Electronic States of Ne2  + and Ar2  + by Measuring Kinetic-Energy-Release Distributions
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J. Fedor *, R. Parajuli †, S. Matt-Leubner, O. Echt ‡, F. Hagelberg §, K. Głuch **, A. Stamatovic ††, M. Probst, P. Scheier, and T. D. Märk ‡‡
Institut für Ionenphysik, Leopold Franzens Universität, Technikerstrasse 25, A-6020 Innsbruck, Austria

Received 14 February 2003; published 26 September 2003

Dissociative decay of metastable, electronically excited neon and argon dimer ions produces fragment ions with strikingly dissimilar kinetic-energy-release distributions. The distributions have been modeled based on ab initio calculations of potential energy curves. The unusual bimodal distribution observed for dissociation of Ne2  + arises from competition between radiative and nonradiative decay of the long-lived II(1/2)u state. For Ar2  +, however, electronic predissociation is insignificant.


©2003 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v91/e133401
DOI: 10.1103/PhysRevLett.91.133401
PACS: 36.40.–c, 31.50.Df, 33.70.Ca, 34.50.Gb

* Permanent address: Department of Plasma Physics, Comenius University, SK-84215 Bratislava, Slovak Republic.
† Present address: Department of Physics, Amrit Campus, Tribhuvan University, Kathmandu, Nepal.
‡ Permanent address: Department of Physics, University of New Hampshire, Durham, NH 03824, USA.
§ Permanent address: Department of Physics, Atmospheric Sciences, and General Science, Jackson State University, Jackson, MS 39217, USA.
** Permanent address: Institute of Mathematics, Physics and Informatics, Maria Curie-Sklodowska University, Lublin 20-031, Poland.
†† Permanent address: Faculty of Physics, P.O. Box 638, Yu-11001 Beograd, Yugoslavia.
‡‡ Corresponding author. Also at Department of Plasma Physics, Comenius University, SK-84248 Bratislava, Slovak Republic. Email address: tilmann.maerk@uibk.ac.at

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