Measurements of N2-broadening and pressure-shift coefficients in the ν3-band of 12CH4 using a cw-OPO

Mohammad Jahjah, Linh Nguyen, Marco P. Moreno, Malo Cadoret, Jean Jacques Zondy

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have measured the nitrogen-collision-induced line broadening and line shift coefficients of three singlet lines - P(1), R(0) and R(1) - belonging to the ν3 band of methane (12CH4) at 3.29-3.32μm using direct laser absorption spectroscopy by means of a continuous-wave mid-IR optical parametric oscillator. Owing to the well-isolated features of the singlet lines, the lineshapes were modeled with a simple Voigt profile in order to retrieve the line parameter coefficients. The values of the N2-broadening and pressure-shift coefficients agree fairly well with the previously published ones that use either Fourier-transform or mid-infrared difference-frequency spectrometers along with more complex analytic spectroscopic models.

Original languageEnglish
Pages (from-to)251-259
Number of pages9
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume151
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes

Keywords

  • Laser spectroscopy
  • Line parameters
  • Methane
  • Optical parametric oscillator

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Fingerprint Dive into the research topics of 'Measurements of N<sub>2</sub>-broadening and pressure-shift coefficients in the ν<sub>3</sub>-band of <sup>12</sup>CH<sub>4</sub> using a cw-OPO'. Together they form a unique fingerprint.

Cite this