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Proceedings Paper

Chemistry, Spectroscopy And Isotope Separation Of Zirconium And Its Compounds As Revealed By Laser Diagnostics Of Laser Produced Metal Beams.
Author(s): Peter A Hackett; Mark Humphries; David M Rayner; Orson L Bourne; Steven A Mitchell
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Paper Abstract

Recent work from our laboratory on zirconium beams is reviewed. Zirconium metal beams have been produced by laser vaporization of solid zirconium targets coupled with supersonic expansion of helium gas. The resultant supersonic metal beam is shown to present an ideal environment for various spectroscopic techniques. The state distribution of zirconium atoms in the beam is obtained from low resolution laser induced fluorescence (LIF) studies. High resolution LIF studies give information on the hyperfine splitting in the ground state of the zirconium-91 isotope. Information on the hyperfine splitting in the excited state is obtained from quantum heat spectroscopy. Low resolution 2 color multiphoton ionization spectroscopy using a XeC1 laser allows isotope separation of all isotopes of zirconium. This same technique, using a tunable UV laser reveals that the previously accepted values for the ionization potential for zirconium are in chemically significant error (2500 cm-1) and permits precise (±0.3 cm-1) measurement of the ionization potential for this element via the observation of long (n=55 to 80) Rydberg series. These metal beams are highly reactive and can be used to produce novel chemical species. The results of two studies in which a reactant is added to the expansion gas are reported here. Zirconium oxide (ZrO), a molecule observed in the emission spectra of cool stars and in laboratory studies at high temperatures, is produced in a low temperature, collision free environment by adding small quantities of oxygen to the expansion gas. Zirconium fluoride (ZrF), a molecule previously unobserved, is produced by the addition of small quantities of CF4.

Paper Details

Date Published: 25 November 1986
PDF: 6 pages
Proc. SPIE 0669, Laser Applications in Chemistry, (25 November 1986); doi: 10.1117/12.938931
Show Author Affiliations
Peter A Hackett, National Research Council (Canada)
Mark Humphries, National Research Council (Canada)
David M Rayner, National Research Council (Canada)
Orson L Bourne, National Research Council (Canada)
Steven A Mitchell, National Research Council (Canada)

Published in SPIE Proceedings Vol. 0669:
Laser Applications in Chemistry
D. K. Evans, Editor(s)

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