Auger recombination and excited state relaxation dynamics in Hg n- (n=9-20) anion clusters

Graham B. Griffin; Oli T. Ehrler; Aster Kammrath; Ryan M. Young; Ori Cheshnovsky; Daniel M. Neumark

doi:10.1063/1.3149562

Auger recombination and excited state relaxation dynamics in Hg _n^- (n=9-20) anion clusters

Graham B. Griffin, Oli T. Ehrler, Aster Kammrath, Ryan M. Young, Ori Cheshnovsky, Daniel M. Neumark

Paula M. Trienens Institute for Sustainability and Energy

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Using femtosecond time-resolved photoelectron imaging, electron-hole pairs are created in size-selected Hg_n^- anion clusters (n=9-20), and the subsequent decay dynamics are measured. These clusters eject electrons via Auger decay on time scales of 100-600 fs. There is an abrupt increase in the Auger decay time for clusters larger than Hg₁₂^-, coinciding with the onset of the transition from van der Waals to covalent bonding in mercury clusters. Our results also show evidence for subpicosecond excited state relaxation attributed to inelastic electron-electron and electron-hole scattering as well as hole-induced contraction of the cluster.

Original language	English (US)
Article number	231103
Journal	Journal of Chemical Physics
Volume	130
Issue number	23
DOIs	https://doi.org/10.1063/1.3149562
State	Published - 2009

Funding

This research was supported by the National Science Foundation under Grant No. CHE-0649647. Additional support was provided by the United States–Israel Binational Science Foundation (BSF), Jerusalem, Israel, under Grant Nos. 2000-333 and 2004-401. O.T.E. is grateful to the Alexander von Humboldt Foundation (Germany) for the award of a Feodor-Lynen fellowship.

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

Access to Document

10.1063/1.3149562

Cite this

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title = "Auger recombination and excited state relaxation dynamics in Hg n- (n=9-20) anion clusters",

abstract = "Using femtosecond time-resolved photoelectron imaging, electron-hole pairs are created in size-selected Hgn- anion clusters (n=9-20), and the subsequent decay dynamics are measured. These clusters eject electrons via Auger decay on time scales of 100-600 fs. There is an abrupt increase in the Auger decay time for clusters larger than Hg12-, coinciding with the onset of the transition from van der Waals to covalent bonding in mercury clusters. Our results also show evidence for subpicosecond excited state relaxation attributed to inelastic electron-electron and electron-hole scattering as well as hole-induced contraction of the cluster.",

author = "Griffin, {Graham B.} and Ehrler, {Oli T.} and Aster Kammrath and Young, {Ryan M.} and Ori Cheshnovsky and Neumark, {Daniel M.}",

note = "Funding Information: This research was supported by the National Science Foundation under Grant No. CHE-0649647. Additional support was provided by the United States–Israel Binational Science Foundation (BSF), Jerusalem, Israel, under Grant Nos. 2000-333 and 2004-401. O.T.E. is grateful to the Alexander von Humboldt Foundation (Germany) for the award of a Feodor-Lynen fellowship.",

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AU - Griffin, Graham B.

AU - Ehrler, Oli T.

AU - Kammrath, Aster

AU - Young, Ryan M.

AU - Cheshnovsky, Ori

AU - Neumark, Daniel M.

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AB - Using femtosecond time-resolved photoelectron imaging, electron-hole pairs are created in size-selected Hgn- anion clusters (n=9-20), and the subsequent decay dynamics are measured. These clusters eject electrons via Auger decay on time scales of 100-600 fs. There is an abrupt increase in the Auger decay time for clusters larger than Hg12-, coinciding with the onset of the transition from van der Waals to covalent bonding in mercury clusters. Our results also show evidence for subpicosecond excited state relaxation attributed to inelastic electron-electron and electron-hole scattering as well as hole-induced contraction of the cluster.

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