𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Narrowing and Broadening Parameters for H2O Lines in the ν2 Band Perturbed by Nitrogen from Fourier Transform and Tunable Diode Laser Spectroscopy

✍ Scribed by C. Claveau; A. Henry; M. Lepère; A. Valentin; D. Hurtmans

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
270 KB
Volume
212
Category
Article
ISSN
0022-2852

No coin nor oath required. For personal study only.

✦ Synopsis

Collision effects on water vapor line profiles perturbed by nitrogen at room temperature have been studied by Fourier transform and tunable diode laser spectroscopy. Narrowing effect due to molecular confinement (Dicke effect) has been observed for P and Q branch lines of the ν 2 band of H 2 O with Fourier transform spectrometer. Narrowing and broadening parameters have been determined using the soft and hard collision models. A more precise study on three R-branch lines with a frequency stabilized diode laser spectrometer allows to perform the comparison between the two collision models at low pressure and to analyze the different narrowing effects when the pressure increases taking into account the molecular confinement and the absorber speed dependent effects.

📜 SIMILAR VOLUMES

Nitrogen Broadening of Absorption Lines
Nitrogen Broadening of Absorption Lines in the ν1, ν2, and ν3Bands of H2S Determined by Applying an IR Diode Laser Spectrometer
✍ I. Meusel; B. Sumpf; H.-D. Kronfeldt 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 118 KB

With an infrared diode laser spectrometer in pulse mode we studied the N2 broadening of H2S absorption lines in the nu1, nu2, and nu3 bands. Altogether 22 lines were investigated: 16 lines from the R branch of the nu1 band (3

Volume 211, Number 2 (2002), in the arti
Volume 211, Number 2 (2002), in the article “Infrared Line Strengths and Pressure Broadening Coefficients in the ν12 Vibrational Band of Hydrazine Measured by Infrared Tunable Diode Laser Spectroscopy,” by Susan E. Plunkett, Mark S. Zahniser, Milton E. Parrish, David D. Nelson, Joanne H. Shorter, Joda Wormhoudt, and Kenneth H. Shafer, pp. 241–247 (
📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 27 KB

FIG. 6. Plot of integrated absorption from 965.4774 to 965.6633 cm -1 versus hydrazine column density (number density times path length). The slope is the integrated line strength for this spectral region.