The line intensities and pressure broadening coefficients for transitions in the three branches of the ν₂ parallel band of CH₃I are measured for the first time for about 1317 lines with rotational quantum numbers 2 ≤ J ≤ 70 and 0 ≤ K ≤ 13 using a mono-spectrum fitting technique utilizing a Voigt profile. Five spectra have been recorded at room temperature (T = 297.6 K) with a high resolution Fourier transform spectrometer at pressures between 1.15 and 9.98 mbar. The measured intensities were used to derive the transition dipole moment squared for each line, the band intensity as well as the Herman–Wallis coefficients. These parameters were used to predict the values of line intensities. The band intensity was compared with previous works performed at medium resolution. The rotational dependencies of the self-broadening coefficients have been clearly observed and modeled using an empirical model. The average accuracies were estimated to be around 5 % for line intensities and self-broadening coefficients.

The whole set of results is given as supplementary material for a possible use in atmospheric and industrial applications.

在ν的三个分支转换的线强度和压力加宽系数₂ CH的平行带₃ I的首次测量约1317线与旋转量子数2≤ Ĵ ≤70和0≤ ķ ≤13使用利用Voigt轮廓的单光谱拟合技术。在室温下记录了五个光谱（T = 297.6 K）和高分辨率的傅立叶变换光谱仪，压力介于1.15和9.98 mbar之间。测得的强度用于得出每条线的跃迁偶极矩平方，带强度以及Herman-Wallis系数。这些参数用于预测线强度的值。将带强度与以前以中等分辨率进行的工作进行比较。自增系数的旋转相关性已被清楚地观察到，并使用经验模型进行了建模。线强度和自增宽系数的平均精度估计约为5％。

整个结果集作为补充材料提供，可能在大气和工业应用中使用。