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Title: Orientation and alignment effects in ion-induced fragmentation of water: A triple coincidence study

The technique of recoil ion momentum spectroscopy is employed to determine the complete momentum vectors for three fragment dissociation channels, [D{sub 2}O]{sup (q+2)} → (D{sup +} + D{sup +} + O{sup q+}) with q = 1, 2, or 3 formed in collisions of isolated water molecules with 450 keV Xe{sup 9+} ions. The kinetic energy released in each of these dissociation channels is measured and angular correlations between the fragment momenta are determined. From the angular correlations of the three fragment ions with the direction of the incoming beam, a strong anisotropy in the emission of recoil fragments is reported. It is inferred that the molecular plane prefers to lie orthogonal to the incoming beam direction with certain orientations being more preferred than others and a clear signature of non-coplanar dissociation is also observed.
Authors:
 [1] ;  [2]
  1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
  2. Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067 (India)
Publication Date:
OSTI Identifier:
22310754
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANGULAR CORRELATION; ANISOTROPY; COLLISIONS; DISSOCIATION; EMISSION; HEAVY WATER; KINETIC ENERGY; MOLECULES; SPECTROSCOPY