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ID 20638
file
creator
Ibuki, Toshio
Itoh, Shin-ichi
Tamenori, Yusuke
Nagaoka, Shin-ichi
Morishita, Yuichiro
Suzuki, Isao H.
subject
K-shell excitation
Ultrafast dissociation
Auger electron spectroscopy
Asymmetry parameter
NDC
Chemistry
abstract
Atomiclike Auger electron emission was observed in resonant excitation of F1s electron into the σ*CSF molecular orbital of CF3SF5. This finding means that an S-F bond forming the C-S-F linear skeleton in the ground state dissociates in the order of femto-seconds. The Auger electron emitted from the F atom showed a Doppler shift by using angle-resolved photoelectron spectroscopy. Asymmetry parameter for the leaving F atom relative to the linearly polarized electric vector was deduced to be β = 1.9 at high photon energy of 688.7 eV and a value of β = 1.1 by detuning the photon energy down to 686.8 eV. The variation of β on the exciting energies projects a profile that an axial recoil approximation effectively works for the ultrafast S-F dissociation when the F1s-1σ*CSF state is generated at high energy level on the σ*CSF potential curve but retardation effects between the F and CF3SF4 fragments become noticeable at low energy level where kinetic energy of the F atom gets smaller.
journal title
Journal of Electron Spectroscopy and Related Phenomena
volume
Volume 154
issue
Issue 3
start page
53
end page
59
date of issued
2007-02
publisher
Elsevier Science B.V.
issn
0368-2048
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2006 Elsevier B.V.
relation url
department
Graduate School of Science