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Title: Laser ablation of NaN{sub 3} and CsN{sub 3}

Solid sodium azide and cesium azide crystals were irradiated by high power laser pulses; the ablation products were rapidly cooled by a supersonic expansion of helium and detected by a time of flight mass spectrometer. Neutral and positively charged species were separately recorded and analyzed using {sup 15}N isotopomers to help in their assignment. Cluster series of the sequences Na(NaN{sub 3}){sub n} [or Cs(CsN{sub 3}){sub n}] were observed, as well as clusters containing NaOH and NaCN; the origin of the C, H, and O atoms appears to be water and CO{sub 2} occluded in the salt. Addition of D{sub 2}O increased the intensity of large clusters and added deuterated ones, whereas addition of chloroform leads to formation of clusters of a Na atom with (NaCl){sub n} clusters. Possible mechanisms for the formation of these clusters are discussed.
Authors:
; ;  [1]
  1. Department of Physical Chemistry and the Farkas Center for Light Induced Processes, Hebrew University of Jerusalem, Jerusalem (Israel)
Publication Date:
OSTI Identifier:
20722875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 122; Journal Issue: 22; Other Information: DOI: 10.1063/1.1899564; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABLATION; AZIDES; CARBON DIOXIDE; CESIUM COMPOUNDS; CHLOROFORM; HEAVY WATER; HELIUM; LASERS; MOLECULAR CLUSTERS; PULSES; SODIUM CHLORIDES; SODIUM COMPOUNDS; SODIUM HYDROXIDES; TIME-OF-FLIGHT MASS SPECTROMETERS; TIME-OF-FLIGHT METHOD