Probing Electronic States of ${\mathrm{N}\mathrm{e}}_{2}^{\text{ }\text{ }+}$ and ${\mathrm{A}\mathrm{r}}_{2}^{\text{ }\text{ }+}$ by Measuring Kinetic-Energy-Release Distributions

Probing Electronic States of ${N e}_{2}^{+}$ and ${A r}_{2}^{+}$ by Measuring Kinetic-Energy-Release Distributions

J. Fedor, R. Parajuli, S. Matt-Leubner, O. Echt, F. Hagelberg, K. Głuch, A. Stamatovic, M. Probst, P. Scheier, and T. D. Märk

Phys. Rev. Lett. 91, 133401 – Published 26 September 2003

Abstract

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 ${N e}_{2}^{+}$ arises from competition between radiative and nonradiative decay of the long-lived $I I (1 / 2)_{u}$ state. For ${A r}_{2}^{+}$ , however, electronic predissociation is insignificant.

Received 14 February 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.133401

Authors & Affiliations

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

^*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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Vol. 91, Iss. 13 — 26 September 2003

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Physical Review Letters

Probing Electronic States of Ne2 + and Ar2 + by Measuring Kinetic-Energy-Release Distributions

J. Fedor, R. Parajuli, S. Matt-Leubner, O. Echt, F. Hagelberg, K. Głuch, A. Stamatovic, M. Probst, P. Scheier, and T. D. Märk

Phys. Rev. Lett. 91, 133401 – Published 26 September 2003

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Probing Electronic States of ${N e}_{2}^{+}$ and ${A r}_{2}^{+}$ by Measuring Kinetic-Energy-Release Distributions