Temperature dependent Raman spectra of ammonia ranging from 3150 cm−1 to 3810 cm−1 for combustion applications

Chaobo Yang, Diana Ezendeeva, Tao Yu, Gaetano Magnotti

Research output: Contribution to journalArticlepeer-review

Abstract

Applying in combustion research, Raman scattering technique can provide high accuracy and high precision measurements of temperature and major species concentrations. However detailed knowledge of the temperature dependent Raman spectra of the probed species is a precondition to realise the potential of high precision and accuracy of the technique. As a carbon free novel fuel, the knowledge of high temperature Raman spectra of ammonia is rarely reported. We measured the Raman spectra of ammonia ranging from 299 K to 760 K. The high resolution Raman spectra are excited with a continuous wave 532 nm laser and detected with an low aberration Schmidt-Czerny-Turner spectrometer. The temperature of probe volume was determined by the fitting of N2 Raman spectra. The Raman spectra of ammonia under different temperatures were quantitatively normalized to the same number density to research the temperature behavior of spectra. Within the Raman shift region from 3150 cm−1 to 3810 cm−1, the Raman intensity and the polarization anisotropy of vibrational modes ν1, ν3, and 2ν4 were reported. The relative intensity between ν1, ν3, and 2ν4 modes were also analyzed under different temperatures.
Original languageEnglish (US)
Pages (from-to)33234
JournalOptics Express
Volume29
Issue number21
DOIs
StatePublished - Sep 29 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Temperature dependent Raman spectra of ammonia ranging from 3150 cm−1 to 3810 cm−1 for combustion applications'. Together they form a unique fingerprint.

Cite this