Faculté des sciences

On the role of the II(1/2g) state in spontaneous dissociation of krypton and xenon dimer ions

Fedor, Juraj ; Echt, O. ; Głuch, K. ; Matt-Leubner, S. ; Scheier, P. ; Märk, T.D.

In: Chemical Physics Letters, 2007, vol. 437, no. 4-6, p. 183-188

We have measured kinetic-energy-release distributions (KERD) for spontaneous dissociation of electronically excited dimer ions of krypton and xenon, formed by electron impact ionization of neutral precursors. The data cannot be reconciled by decay of the strongly bound II(1/2u) state that successfully explains dissociation of and Ne₂⁺ and Ar₂⁺. Instead, the KERD is dominated by... Plus

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    Summary
    We have measured kinetic-energy-release distributions (KERD) for spontaneous dissociation of electronically excited dimer ions of krypton and xenon, formed by electron impact ionization of neutral precursors. The data cannot be reconciled by decay of the strongly bound II(1/2u) state that successfully explains dissociation of and Ne₂⁺ and Ar₂⁺. Instead, the KERD is dominated by contributions from the weakly bound II(1/2g) state that has so far escaped a convincing experimental characterization. The present data can be utilized to assess the accuracy of ab initio potential energy curves of this state.