NO_2 v_3带谱线外来气体压致增宽系数的温度依赖关系

Temperature Dependence of Foreign Gas Broadening for Spectral Lines on v_3 Band of NO_2

在273-373K的温度范围内,采用激光磁共振方法,得到了NO_2v_3带谱线的几种外加气体压致增宽系数,并由之确定了压致增宽系数对温度的依赖关系。将结果与已发表的有关数据作了比较,并根据Anderson碰撞增宽理论作了分析和解释。

In the previous paper, we developed an (?)direct method for spectral linewidth measurement by which the linewidths and pressure broadening coefficients of spectral lines can be derived from the pressure dependence of the peak-to-peak ainplitudes of the first derivative curve of the absorption lines. In this paper, as a continuation, the experiment is described, which applied this method to study the temperature dependence of pressure broadening of the laser magnetic resonance spectral lines of NO_2. Coefficients or pressure broadening of spectral lines on v_3 band of NO_2 by a few foreign gases have been measured over a temperature range from 273 to 373K. Over this rangg, the linewidths broadened by O_2, N_2 and air were found to vary as T^(-x), and the relative values of x were determined to be 0.92 ± 0.17, 0.97 ± 0.12, and 0.96 ± 0.13 respectively. The results were compared with the published data. Interpretation based on Anderson's impact theory was given.