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Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S

Vall-llosera, Gemma LU ; Melero García, Emilio; Kivimäki, Antti; Rachlew, Elisabeth; Coreno, Marcello; de Simone, Monica; Richter, Robert and Prince, Kevin C. (2007) In Physical Chemistry Chemical Physics 9(3). p.389-395
Abstract
Visible-UV fluorescence emission of gas-phase hydrogen sulfide, H(2)S, has been studied at the S 2p edge with synchrotron radiation excitation. Dispersed fluorescence measurements in the wavelength range 300-900 nm were taken at several photon energies corresponding to the excitations of the S 2p electrons to the unoccupied molecular and Rydberg orbitals. The spectra reveal fluorescence from the H, S, S(+), HS and HS(+) photo-fragments. H is found to be the strongest emitter at Rydberg excitations, while the emission from S(+) is dominant at the molecular resonances and above the S 2p ionization thresholds. The intensities of hydrogen Lyman-alpha (122 nm), Balmer-alpha (656 nm), Balmer-beta (486 nm) transitions as well as the visible-UV... (More)
Visible-UV fluorescence emission of gas-phase hydrogen sulfide, H(2)S, has been studied at the S 2p edge with synchrotron radiation excitation. Dispersed fluorescence measurements in the wavelength range 300-900 nm were taken at several photon energies corresponding to the excitations of the S 2p electrons to the unoccupied molecular and Rydberg orbitals. The spectra reveal fluorescence from the H, S, S(+), HS and HS(+) photo-fragments. H is found to be the strongest emitter at Rydberg excitations, while the emission from S(+) is dominant at the molecular resonances and above the S 2p ionization thresholds. The intensities of hydrogen Lyman-alpha (122 nm), Balmer-alpha (656 nm), Balmer-beta (486 nm) transitions as well as the visible-UV total fluorescence yield (300-900 nm) and the total ion yield were measured by scanning the photon energy in small steps across the S 2p edge. The different Balmer lines show some sensitivity to the specific core excitations, which is, however, not so strong as that recently observed in the water molecule [E. Melero García, A. Kivimäki, L. G. M. Pettersson, J. Alvarez Ruiz, M. Coreno, M. de Simone, R. Richter and K. C. Prince, Phys. Rev. Lett., 2006, 96, 063003]. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
9
issue
3
pages
389 - 395
publisher
The Royal Society of Chemistry
external identifiers
  • pmid:17199155
  • scopus:33845962796
ISSN
1463-9084
DOI
10.1039/b610199b
language
English
LU publication?
no
id
1b197360-c04d-4798-b0ae-064951bff45c (old id 1156037)
date added to LUP
2008-06-04 09:54:32
date last changed
2017-01-01 07:44:52
@article{1b197360-c04d-4798-b0ae-064951bff45c,
  abstract     = {Visible-UV fluorescence emission of gas-phase hydrogen sulfide, H(2)S, has been studied at the S 2p edge with synchrotron radiation excitation. Dispersed fluorescence measurements in the wavelength range 300-900 nm were taken at several photon energies corresponding to the excitations of the S 2p electrons to the unoccupied molecular and Rydberg orbitals. The spectra reveal fluorescence from the H, S, S(+), HS and HS(+) photo-fragments. H is found to be the strongest emitter at Rydberg excitations, while the emission from S(+) is dominant at the molecular resonances and above the S 2p ionization thresholds. The intensities of hydrogen Lyman-alpha (122 nm), Balmer-alpha (656 nm), Balmer-beta (486 nm) transitions as well as the visible-UV total fluorescence yield (300-900 nm) and the total ion yield were measured by scanning the photon energy in small steps across the S 2p edge. The different Balmer lines show some sensitivity to the specific core excitations, which is, however, not so strong as that recently observed in the water molecule [E. Melero García, A. Kivimäki, L. G. M. Pettersson, J. Alvarez Ruiz, M. Coreno, M. de Simone, R. Richter and K. C. Prince, Phys. Rev. Lett., 2006, 96, 063003].},
  author       = {Vall-llosera, Gemma and Melero García, Emilio and Kivimäki, Antti and Rachlew, Elisabeth and Coreno, Marcello and de Simone, Monica and Richter, Robert and Prince, Kevin C.},
  issn         = {1463-9084},
  language     = {eng},
  number       = {3},
  pages        = {389--395},
  publisher    = {The Royal Society of Chemistry},
  series       = {Physical Chemistry Chemical Physics},
  title        = {Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S},
  url          = {http://dx.doi.org/10.1039/b610199b},
  volume       = {9},
  year         = {2007},
}