Abstract Using a high-resolution tunable diode-laser spectrometer, we measured N2-collisional broadening coefficients in the ν 2 band of chloromethane. Measurements have been realized for 15 lines at room temperature and 5 lines at different low temperatures. For each line under study, we have recorded spectra at 4 pressures of perturber gas ranging from 12 to 55 mbar. The experimental line profiles, at each pressure and each temperature, have been fitted with three different line shape models. From these fits, we obtained the collisional half-width and accurately deduced N2-broadening coefficients at up to 4 temperatures between 200 K and 296 K. Using the usual empirical power law, we determined the temperature dependence parameter of the N2-broadening coefficients.

中文翻译：

---

从低温到室温，氯甲烷 ν2 带中谱线的 N2 碰撞展宽系数

摘要 使用高分辨率可调谐二极管激光光谱仪，我们测量了氯甲烷 ν 2 波段中的 N2 碰撞展宽系数。已经实现了15条常温线和5条不同低温线的测量。对于研究中的每条谱线，我们都记录了 4 种干扰气体压力下的光谱，范围从 12 到 55 毫巴。在每个压力和每个温度下的实验线轮廓已经拟合了三种不同的线形模型。从这些拟合中，我们获得了碰撞半宽度并准确推导出了 200 K 和 296 K 之间多达 4 个温度下的 N2 展宽系数。使用通常的经验幂律，我们确定了 N2 展宽系数的温度相关参数。