In this paper, we report high-resolution measurements of oxygen and nitrogen pressure-broadening coefficients for ro-vibrational transitions in the ν₃ and 2ν₃-ν₃ bands of methyl chloride (CH₃³⁵Cl and CH₃³⁷Cl). We present the first high-resolution measurement of oxygen broadening coefficients for the CH₃Cl, along with an extensive determination of the nitrogen broadening coefficients in the ν₃ band which complements the measurements made by diode laser spectrometer in previous works. For the 2ν₃-ν₃ band, the oxygen and nitrogen broadening coefficients are measured here for the first time. The results have been obtained by analyzing fourteen spectra with a mono-spectrum non-linear least squares fitting of Voigt profile using data recorded at 295 K at the AILES beamline of the SOLEIL Synchrotron facility using a Bruker IF125HR Fourier transform spectrometer. Broadening coefficients of 1793 and 1732 lines in both bands of both isotopes of CH₃Cl for O₂ and N₂ buffer gases respectively have been retrieved. The rotational dependences of these coefficients have been modeled using an empirical model, which reproduces the measured data with a difference of about 6 %. Using the measured values of O₂- and N₂-broadenings, we derived the Air-broadening coefficients. Finally, comparisons with previous works are performed.

在本文中，我们在ν汇报RO-振动跃迁的氧和氮压力加宽系数的高分辨率测量₃和2ν ₃ -ν ₃的甲基氯的频带（CH ₃ ³⁵ Cl和CH ₃ ³⁷ Cl）的。我们提出用于CH氧加宽系数的第一高分辨率测量₃氯，与在ν广泛判定氮加宽系数的沿₃条带，其补充了二极管激光器光谱仪在以前的工作进行的测量。对于2ν ₃ -ν ₃在此，第一次测量氧气和氮气的扩散系数。通过使用在Bruker IF125HR傅里叶变换光谱仪在SOLEIL Synchrotron设施的AILES光束线上以295 K记录的数据，通过Voigt轮廓的单光谱非线性最小二乘拟合分析十四个光谱获得了结果。在CH ₃ Cl的两个同位素的两个谱带中，分别获得了O ₂和N ₂缓冲气体的1793和1732谱线的展宽系数。这些系数的旋转相关性已使用经验模型进行建模，该模型可再现测量数据，相差约6％。使用O _2-和N ₂的测量值-扩宽，我们得出了扩气系数。最后，与以前的工作进行比较。