Abstract：The simulation and fitting of the overlapped spectral lines with Voigt profile were presented in this paper. The relative errors ε of the fitted pressure-broadening linewidth when taking the overlapped spectral line as one spectrum were discussed in detail. The relationship between such error and the two spectral lines center distance δν0, and theoretical pressure-broadening linewidth δν0Ｌ were analyzed. ε is found to be very large and the relationship between ε and δν0, δν0Ｌ is very complicated when the value of pressure-broadening linewidth is considerably less than that of Dopplerian one δνＤ. When δν0Ｌ is comparative to δνＤ the relationship between ε and δν0 is close to the smooth two-order polynomial curve. However, the slop of this curve is negative while δν0Ｌ is smaller than δνＤ and is positive when larger. Generally, ε decreases with the increase of proportion of δν0Ｌ to the whole spectral linewidth. All the above conclusion and corresponding data are the significant reference to determine the precise pressure-broadening coefficient from the experimentally indistinguishable overlapped spectrum, as well as to correct the fitted pressure-broadening linewidth.
林洁丽, 黄义清，路 洪. 实验不可分辨的Voigt线型重叠谱线的压致展宽线宽的偏差确定 [J]. 光谱学与光谱分析, 2005, 25(01): 128-132.
LIN Jie-li, HUANG Yi-qing, LU Hong. Determination of Relative Error of Pressure-Broadening Linewidth for the Experimentally Indistinguishable Overlapped Spectral Lines with Voigt Profile . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(01): 128-132.
