Al-Jalali Muhammad A, Aljghami Issam F, Mahzia Yahia M
Physics Department, Faculty of Science, Taif University, Taif, AL-Haweiah, P. O. Box 888, Zip code 21974, Saudi Arabia.
Physics Department, Faculty of Science, Damascus University, Damascus, Syrian Arab Republic.
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Mar 15;157:34-40. doi: 10.1016/j.saa.2015.12.010. Epub 2015 Dec 12.
Experimental spectral lines of pure oxygen at 1270 nm band were analyzed by Voigt deconvolution method. The method gave a total Voigt profile, which arises from two overlapping bands. Deconvolution of total Voigt profile leads to two Voigt profiles, the first as a result of O2 dimol at 1264 nm band envelope, and the second from O2 monomer at 1268 nm band envelope. In addition, Voigt profile itself is the convolution of Lorentzian and Gaussian distributions. Competition between thermal and collisional effects was clearly observed through competition between Gaussian and Lorentzian width for each band envelope. Voigt full width at half-maximum height (Voigt FWHM) for each line, and the width ratio between Lorentzian and Gaussian width (ΓLΓG(-1)) have been investigated. The following applied pressures were at 1, 2, 3, 4, 5, and 8 bar, while the temperatures were at 298 K, 323 K, 348 K, and 373 K range.
