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Deconvolution of a spectrum

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    EPA1 - Deconvolution of spectra - Google Patents

    In good all round condition. Academic Pr. Used - Good. Former Library book. Shows some signs of wear, and may have some markings on the inside. The Gaussian temperature Doppler -broadened profile and a collision Lorentzian -broadened profile are given as follows:. Whereas, a Voigt profile, mathematically, is the convolution of the Gaussian and the Lorentzian intensities:.

    Voigt deconvolution method is the opposite of Voigt convolution method. It aims to analyze every spectral line to their components. The simple method denotes to analyzing one or two of visible peaks, whereas the advanced method is a full survey to all peaks and analyzes all appeared and disappeared peaks to their components. The aim of this paper is to analyze the experimental results of pure oxygen spectrum at nm band by a simple and advanced Voigt deconvolution method. All spectra measurements of pure oxygen were carried out at the spectroscopy laboratory.

    The temperature was constant at K and pressures of gas were 1, 5, 10, 15, 20, 25 bar. Experimental measurements were chosen to measure the absorbance as a function of wavelength in the near infrared region extended between - nm.

    Emission and Absorption Spectra

    Origin pro Lab program was used for simple and advanced data analysis. The absolute area under the spectral line A , central wavelength X c ,Gaussian WG , Lorentzian WL width and full width at half-maximum height FWHM in each spectral line were exactly defined through the deconvolution method of the Voigt profile function.

    Simple and advanced analysis of six samples from twenty-five samples was subjected to pressures extended from 1 to 25 bars at K, K, K, and K. In this paper, pressures, which were chosen, are 1, 5, 10, 15, 20, 25 bar at only K, where other pressures will be dealt with in other papers.

    EP2495546A1 - Deconvolution of spectra - Google Patents

    Figure 1 shows tough data analysis to total oxygen spectrum between - nm. Figures 1 a - f inside Figure 1 show the peaks number for each line, where the number of peaks decreases with pressures increasing. Because of the highly density of peaks number between - nm, only peaks lines between - nm were taken into account, where the interested lines nm, nm exist between these lines.

    All results and values were taken based on the absorbance intensity as a function of wavelength nm.

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    • In addition, mathematical absolute area integrated absorbance under each main line was calculated to equal to sum of mathematical absolute areas for all separated lines by advanced data analysis, and absolute area integrated absorbance increases with increasing of pressure see Figures All Figure 2 a , Figure 3 a , Figure 4 a , Figure 5 a , Figure 6 a , Figure 7 a show how the main spectral line was separated from the Voigt deconvolution method to two spectral lines, the first belongs to O 2 monomer at nm central wavelength, and the second to O 2 binary absorbance at nm central wavelength.

      Figure 1. Advanced analysis of spectral lines by Voigt deconvolution method black line indicates the main spectral line, red line denotes to cumulative fit peak to main line, and the green line denotes to all analyzed spectral lines which came from analysis of main line black line.

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      Figure 2. Simple and advanced data analysis at 1 bar and K. Figure 3. Simple and advanced data analysis at 5 bar and K. Figure 4. Simple and advanced data analysis at 10 bar and K.