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Title: Driving photochemistry by clustering: The ICl-Xe case

Abstract

We present slice imaging data demonstrating the influence of clustering on the photodissociation dynamics of a diatomic molecule: iodine monochloride (ICl) was dissociated at 235 nm in He and Xe seed gasses, probing both Cl and I photofragment energy and angular distributions. We observe that the kinetic energy releases of both Cl and I fragments change from He to Xe seeding. For Cl fragments, the seeding in Xe increases the kinetic energy release of some Cl fragments with a narrow kinetic energy distribution, and leads to some fragments with rather broad statistical distribution falling off exponentially from near-zero energies up to about 2.5 eV. Iodine fragment distribution changes even more dramatically from He to Xe seeding: sharp features essentially disappear and a broad distribution arises reaching to about 2.5 eV. Both these observations are rationalized by a simple qualitative cluster model assuming ICl dissociation inside larger xenon clusters and 'on surface' of smaller Xe species.

Authors:
 [1];  [2]; ;  [1];  [3];  [4];  [1]
  1. Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Vassilika Vouton, 71110 Heraklion (Greece)
  2. (Serbia)
  3. (Greece)
  4. J. Heyrovsky Institute of Physical Chemistry v.v.i., Academy of Sciences of the Czech Republic, Dolejskova 3, 18223 Prague (Czech Republic)
Publication Date:
OSTI Identifier:
22099062
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 137; Journal Issue: 15; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; ATOM-MOLECULE COLLISIONS; CLUSTER MODEL; DISSOCIATION; DISSOCIATION ENERGY; EV RANGE 01-10; HELIUM; IODINE CHLORIDES; KINETIC ENERGY; MOLECULAR CLUSTERS; PHOTOCHEMISTRY; PHOTOLYSIS; XENON

Citation Formats

Glodic, Pavle, Vinca Institute of Nuclear Sciences, P.O. Box 522, Belgrade 11001, Kartakoullis, Andreas, Kitsopoulos, Theofanis N., Department of Chemistry, University of Crete, Voutes, 71110 Heraklion, Farnik, Michal, and Samartzis, Peter C. Driving photochemistry by clustering: The ICl-Xe case. United States: N. p., 2012. Web. doi:10.1063/1.4758317.
Glodic, Pavle, Vinca Institute of Nuclear Sciences, P.O. Box 522, Belgrade 11001, Kartakoullis, Andreas, Kitsopoulos, Theofanis N., Department of Chemistry, University of Crete, Voutes, 71110 Heraklion, Farnik, Michal, & Samartzis, Peter C. Driving photochemistry by clustering: The ICl-Xe case. United States. doi:10.1063/1.4758317.
Glodic, Pavle, Vinca Institute of Nuclear Sciences, P.O. Box 522, Belgrade 11001, Kartakoullis, Andreas, Kitsopoulos, Theofanis N., Department of Chemistry, University of Crete, Voutes, 71110 Heraklion, Farnik, Michal, and Samartzis, Peter C. Sun . "Driving photochemistry by clustering: The ICl-Xe case". United States. doi:10.1063/1.4758317.
@article{osti_22099062,
title = {Driving photochemistry by clustering: The ICl-Xe case},
author = {Glodic, Pavle and Vinca Institute of Nuclear Sciences, P.O. Box 522, Belgrade 11001 and Kartakoullis, Andreas and Kitsopoulos, Theofanis N. and Department of Chemistry, University of Crete, Voutes, 71110 Heraklion and Farnik, Michal and Samartzis, Peter C.},
abstractNote = {We present slice imaging data demonstrating the influence of clustering on the photodissociation dynamics of a diatomic molecule: iodine monochloride (ICl) was dissociated at 235 nm in He and Xe seed gasses, probing both Cl and I photofragment energy and angular distributions. We observe that the kinetic energy releases of both Cl and I fragments change from He to Xe seeding. For Cl fragments, the seeding in Xe increases the kinetic energy release of some Cl fragments with a narrow kinetic energy distribution, and leads to some fragments with rather broad statistical distribution falling off exponentially from near-zero energies up to about 2.5 eV. Iodine fragment distribution changes even more dramatically from He to Xe seeding: sharp features essentially disappear and a broad distribution arises reaching to about 2.5 eV. Both these observations are rationalized by a simple qualitative cluster model assuming ICl dissociation inside larger xenon clusters and 'on surface' of smaller Xe species.},
doi = {10.1063/1.4758317},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 15,
volume = 137,
place = {United States},
year = {2012},
month = {10}
}