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Density Measurements in Air by Optically Exciting the Cordes Bands of I2 (2000)

Balla, R. Jeffrey ; Exton, Reginald J.

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Publication Date: 2011-08-23

Description: We describe an optical method based on laser-induced fluorescence for obtaining instantaneous measurements of density along a line in low-density air seeded with I2. The Cordes bands of I2 (D(sup 1)sigma(sup +, sub u)) left arrow X(sup 1)sigma(sup +, sub g)) are excited with a tunable ArF excimer laser. air densities in the range (0.1-6.5) x 10(exp 17) cm(exp -3) are measured over 295-583 K using the density-dependent emission ratio of two emission bands of I2; the 340 nm bands and the diffuse-structured McLennan bands near 320 nm.

Keywords: Geophysics

Type: Measurement Science and Technology (ISSN 0957-0233); Volume 11; 459-466

Format: text

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