The ¹³CH₄ absorption spectra in the range between 7400 and 7600 cm⁻¹ have been recorded at 4 temperatures from 296 K to 200 K using a Fourier transform spectrometer at pressures from 1 to 300 hPa, and at a 0.01 and 0.03 cm⁻¹ spectral resolution. A 60 cm multipath cell with a path length of 1920 cm and a 220 long cm low temperature cell were used, which provided a threshold sensitivity to absorption of the order of 10⁻⁶ cm⁻¹. The parameters of the Hartmann-Tran and Voigt lineshapes (line positions, intensities, self-broadening coefficients, self-shift coefficients and temperature dependences of the half width coefficients) were determined for the strongest transitions of the ¹³CH₄ ν₂ +2ν₃ band.

已经使用傅里叶变换光谱仪在1至300 hPa的压力以及0.01和0.03 cm ^-1的压力下，在296 K至200 K的4个温度下记录了7400至7600 cm ^-1范围内的¹³ CH ₄吸收光谱。光谱分辨率。使用了路径长度为1920 cm的60 cm多路径电池和220 long cm的低温电池，这为吸收提供了10 ^-6  cm ^-1数量级的阈值灵敏度。确定了Hartmann-Tran和Voigt线形的参数（线的位置，强度，自增宽系数，自移系数和半宽度系数的温度依赖性），以用于最强过渡。¹³ CH ₄ ν ₂ +2ν ₃频带。