Density measurement in air by optically exciting the Cordes bands of I-2

Authors
Balla, RJ Exton, RJ
Citation
Rj. Balla et Rj. Exton, Density measurement in air by optically exciting the Cordes bands of I-2, MEAS SCI T, 11(5), 2000, pp. 459-466
Citations number
29
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
MEASUREMENT SCIENCE & TECHNOLOGY
ISSN journal
09570233 → ACNP
Volume
11
Issue
5
Year of publication
2000
Pages
459 - 466
Database
ISI
SICI code
0957-0233(200005)11:5<459:DMIABO>2.0.ZU;2-U
Abstract
We describe an optical method based on laser-induced fluorescence for obtai ning instantaneous measurements of density along a line in low-density air seeded with I-2 The Cordes bands of I-2 (D (1)Sigma(u)(+) <-- X (1)Sigma(g) (+)) are excited with a turntable ArF excimer laser. Air densities in the r ange (0.1-6.5) x 10(17) cm(-3) are measured over 295-583 K using the densit y-dependent emission ratio of two emission bands of I-2; the 340 nm bands a nd the diffuse-structured McLennan bands near 320 nm.