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A MULTIPLE REFLECTION CELL TO ENHANCE DIRECT IR ABSORPTION IN A COLLIMATED MOLECULAR BEAM

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16912

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Title: A MULTIPLE REFLECTION CELL TO ENHANCE DIRECT IR ABSORPTION IN A COLLIMATED MOLECULAR BEAM
Creators: Kaur, Devinder; De Souza, A. M.; Perry, David S.
Issue Date: 1986
Abstract: Direct absorption measurements using an F-center laser are carried out in a collimated molecular beam. Absorbance is increased by passing the laser beam up to 80 times through the molecular beam. The multiple reflection cell consists of two spherical concave mirrors in a near concentric alignment. The laser beam, directed slightly off-axis into the cell, forms a parabolic spot pattern on each mirror. The laser beam reflections collectively form a waist at the center of the cell. The dimension of the waist and the number of reflections can be adjusted independently, enabling efficient coupling to a collimated molecular beam. High resolution sub-Doppler spectra of methyl acetylene with a line width of 35 MHz have been obtained in the 3 micron region.
URI: http://hdl.handle.net/1811/16912
Other Identifiers: 1986-ME-1
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