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Yields and Time-of-Flight Spectra of Neutral High-Rydberg Fragments at the K Edges of the CO2 Molecule

Kivimäki, Antti LU ; Stråhlman, Christian LU ; Wasowicz, Tomasz J.; Kettunen, J. A. LU and Richter, Robert (2016) In The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory 120(25). p.4360-4367
Abstract

We have studied the production of neutral fragments in high-Rydberg (HR) states at the C 1s and O 1s edges of the CO2 molecule by performing two kinds of experiments. First, the yields of neutral HR fragments were measured indirectly by ionizing such fragments in a static electric field and by collecting resulting singly charged positive ions as a function of the photon energy. Such measurements reveal not only excitations below the core ionization thresholds but also thresholds for single core-hole and shakeup photoionization. Second, we obtained the mass spectra of neutral HR fragments at selected photon energies by exploiting pulsed field ionization; they show atomic fragments C(HR) and O(HR). We discuss dissociation... (More)

We have studied the production of neutral fragments in high-Rydberg (HR) states at the C 1s and O 1s edges of the CO2 molecule by performing two kinds of experiments. First, the yields of neutral HR fragments were measured indirectly by ionizing such fragments in a static electric field and by collecting resulting singly charged positive ions as a function of the photon energy. Such measurements reveal not only excitations below the core ionization thresholds but also thresholds for single core-hole and shakeup photoionization. Second, we obtained the mass spectra of neutral HR fragments at selected photon energies by exploiting pulsed field ionization; they show atomic fragments C(HR) and O(HR). We discuss dissociation pathways leading to the production of neutral HR fragments in core excitation and ionization of CO2.

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publication status
published
subject
in
The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
volume
120
issue
25
pages
8 pages
publisher
The American Chemical Society
external identifiers
  • scopus:84976907420
  • wos:000379456300012
ISSN
1089-5639
DOI
10.1021/acs.jpca.6b04495
language
English
LU publication?
yes
id
30af7c7f-f42e-4750-8534-f8644625757e
date added to LUP
2017-01-19 09:34:38
date last changed
2017-09-18 11:32:26
@article{30af7c7f-f42e-4750-8534-f8644625757e,
  abstract     = {<p>We have studied the production of neutral fragments in high-Rydberg (HR) states at the C 1s and O 1s edges of the CO<sub>2</sub> molecule by performing two kinds of experiments. First, the yields of neutral HR fragments were measured indirectly by ionizing such fragments in a static electric field and by collecting resulting singly charged positive ions as a function of the photon energy. Such measurements reveal not only excitations below the core ionization thresholds but also thresholds for single core-hole and shakeup photoionization. Second, we obtained the mass spectra of neutral HR fragments at selected photon energies by exploiting pulsed field ionization; they show atomic fragments C(HR) and O(HR). We discuss dissociation pathways leading to the production of neutral HR fragments in core excitation and ionization of CO<sub>2</sub>.</p>},
  author       = {Kivimäki, Antti and Stråhlman, Christian and Wasowicz, Tomasz J. and Kettunen, J. A. and Richter, Robert},
  issn         = {1089-5639},
  language     = {eng},
  month        = {06},
  number       = {25},
  pages        = {4360--4367},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory},
  title        = {Yields and Time-of-Flight Spectra of Neutral High-Rydberg Fragments at the K Edges of the CO<sub>2</sub> Molecule},
  url          = {http://dx.doi.org/10.1021/acs.jpca.6b04495},
  volume       = {120},
  year         = {2016},
}