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Electronic energy dissipation processes in doped rare gas clusters with a shell-like structure

By Tim Laarmann, Klaus von Haeften, Hubertus Wabnitz and Thomas Möller

Abstract

Metadata only entryEnergy relaxation processes of photoexcited ArM clusters (M < 50) covered with a shell of Kr atoms (up to 30 atoms) which are embedded in large NeN clusters (N = 3500) are investigated with energy-resolved fluorescence spectroscopy. In the energy range of the Ne cluster absorption (16.5–18 eV) a strong energy transfer to the embedded Ar subcluster is observed, which results in desorption of electronically excited Ar* atoms. Ar* move through the Ne cluster, desorb and emit visible and near-infrared light in the vacuum (4p → 4s). By coating the Ar clusters with Kr atoms, the Ar lines disappear and 5p → 5s transitions of Kr become dominant. Additionally, new bands occur, which are assigned to transitions of perturbed atomic Ar 4p states inside Ne clusters. A simple kinematic model is suggested to describe the suppression of desorption of excited Ar atoms from Ne clusters

Publisher: World Scientific Publishing
Year: 2002
DOI identifier: 10.1142/S0218625X02002117
OAI identifier: oai:lra.le.ac.uk:2381/9662
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