Dynamic type Fourier spectrometer development for Raman spectra detection

Abstract

The dynamic Fourier spectrometer model for Raman scattering (RS) is developed. The working spectral range is 800–1050 nm. The excitation source is the laser with the wavelength λ = 785 nm. In the spectrometer the “white light” channel for summing interferograms over several scans is implemented. Also the reference channel with a sampling frequency of λ / 4 is realised. The developed layout in experiments of the chemical compounds registration is approved. The signal-to-noise ratios for recorded Raman spectra are also calculated. The work shows the RS spectra of stilbene (C14H12) and 1,4-bis (5-phenyl-2-oxazolyl) benzene (POPOP, C24H16N2O2) recorded on the model spectrometer. An experimental research of the registration of the minimum amount of stilbene (C14H12) dissolved in acetone using the Raman spectroscopy method was carried out.

Fabrication of a Liquid Scintillator based on 7-Diethylamino-4-Methylcoumarin for Radiation Detection

“…With regard to PPO, the characteristic C = C stretching vibration bands of the phenyl group appear at 1,445, 1,478 and 1,604 cm -1 , and the 1,537 cm -1 peak can be assigned to C = N vibration. For POPOP of the oxazole group, the characteristic C = C stretching vibration bands of the phenyl group appear at 1,490 and 1,510 cm -1 , and the 1,610 cm -1 peak can be assigned to C = N vibration [22][23][24].…”