Auger recombination dynamics in Hg13- clusters

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

doi:10.1016/j.chemphys.2007.12.005

Auger recombination dynamics in Hg₁₃^- clusters

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

^*Corresponding author for this work

School of Chemistry

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

7 Scopus citations

Abstract

Electronic relaxation dynamics following interband excitation from the 6s to the 6p band in mass selected Hg₁₃^- clusters are measured through femtosecond time-resolved photoelectron imaging (TRPEI). This interband transition is pumped at 4.65 eV and probed at 1.55 eV. Auger decay of occurs on a timescale of 490 ± 100 fs, and a similar time constant is seen for the transient excited state population created by the pump pulse. These time constants are an order of magnitude faster than those seen in previous experiments in which the lone p-electron in Hg₁₃^- was excited within the p-band. The results presented here imply that substantial relaxation of either electrons in the p-band or the hole in the s-band takes place prior to Auger emission, with electron-electron scattering playing a key role in the fast observed dynamics.

Original language	English
Pages (from-to)	69-74
Number of pages	6
Journal	Chemical Physics
Volume	350
Issue number	1-3
DOIs	https://doi.org/10.1016/j.chemphys.2007.12.005
State	Published - 23 Jun 2008

Keywords

Auger
Auger dynamics
Auger recombination
Clusters
Electron relaxation dynamics
Electronic excited state relaxation
Excited state relaxation dynamics
Mercury
Photoelectron imaging
Time-resolved photoelectron imaging

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10.1016/j.chemphys.2007.12.005

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@article{78e425982ca54f079151af3de92e339a,

title = "Auger recombination dynamics in Hg13- clusters",

abstract = "Electronic relaxation dynamics following interband excitation from the 6s to the 6p band in mass selected Hg13- clusters are measured through femtosecond time-resolved photoelectron imaging (TRPEI). This interband transition is pumped at 4.65 eV and probed at 1.55 eV. Auger decay of occurs on a timescale of 490 ± 100 fs, and a similar time constant is seen for the transient excited state population created by the pump pulse. These time constants are an order of magnitude faster than those seen in previous experiments in which the lone p-electron in Hg13- was excited within the p-band. The results presented here imply that substantial relaxation of either electrons in the p-band or the hole in the s-band takes place prior to Auger emission, with electron-electron scattering playing a key role in the fast observed dynamics.",

keywords = "Auger, Auger dynamics, Auger recombination, Clusters, Electron relaxation dynamics, Electronic excited state relaxation, Excited state relaxation dynamics, Mercury, Photoelectron imaging, Time-resolved photoelectron imaging",

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

year = "2008",

month = jun,

day = "23",

doi = "10.1016/j.chemphys.2007.12.005",

language = "אנגלית",

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journal = "Chemical Physics",

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T1 - Auger recombination dynamics in Hg13- clusters

AU - Griffin, Graham B.

AU - Kammrath, Aster

AU - Ehrler, Oli T.

AU - Young, Ryan M.

AU - Cheshnovsky, Ori

AU - Neumark, Daniel M.

PY - 2008/6/23

Y1 - 2008/6/23

N2 - Electronic relaxation dynamics following interband excitation from the 6s to the 6p band in mass selected Hg13- clusters are measured through femtosecond time-resolved photoelectron imaging (TRPEI). This interband transition is pumped at 4.65 eV and probed at 1.55 eV. Auger decay of occurs on a timescale of 490 ± 100 fs, and a similar time constant is seen for the transient excited state population created by the pump pulse. These time constants are an order of magnitude faster than those seen in previous experiments in which the lone p-electron in Hg13- was excited within the p-band. The results presented here imply that substantial relaxation of either electrons in the p-band or the hole in the s-band takes place prior to Auger emission, with electron-electron scattering playing a key role in the fast observed dynamics.

AB - Electronic relaxation dynamics following interband excitation from the 6s to the 6p band in mass selected Hg13- clusters are measured through femtosecond time-resolved photoelectron imaging (TRPEI). This interband transition is pumped at 4.65 eV and probed at 1.55 eV. Auger decay of occurs on a timescale of 490 ± 100 fs, and a similar time constant is seen for the transient excited state population created by the pump pulse. These time constants are an order of magnitude faster than those seen in previous experiments in which the lone p-electron in Hg13- was excited within the p-band. The results presented here imply that substantial relaxation of either electrons in the p-band or the hole in the s-band takes place prior to Auger emission, with electron-electron scattering playing a key role in the fast observed dynamics.

KW - Auger

KW - Auger dynamics

KW - Auger recombination

KW - Clusters

KW - Electron relaxation dynamics

KW - Electronic excited state relaxation

KW - Excited state relaxation dynamics

KW - Mercury

KW - Photoelectron imaging

KW - Time-resolved photoelectron imaging

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VL - 350

SP - 69

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JO - Chemical Physics

JF - Chemical Physics

IS - 1-3

ER -

Auger recombination dynamics in Hg₁₃^- clusters

Abstract

Keywords

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