In this work, very high-resolution far-infrared (FIR) and infrared (IR) Synchrotron Radiation spectra of C-13 substituted methanol species have been recorded with very high signal-to-noise (S/N) ratio in the entire region from 40 to 5000 cm⁻¹. High resolution allowed the recording to be done with an unprecedented resolution of about 0.0014 cm⁻¹ which is on the order of the doppler width of the lines. The peak of the spectral lines could be obtained with an estimated accuracy of ± 5 KHz. Analysis of the spectra has been performed for quantum numbers associated with the torsional ground state. Assignments have been obtained for K- values up to about 15 and J- values of about 35 for the three symmetry species. Asymmetry splitting has been observed for low K transitions and accurate asymmetry splitting constants have been obtained. Including the available microwave (MW) and millimeter-wave (MMW) measurements, a complete set of spectral line assignments have been obtained for the ground torsional state of the vibrational state. Following J.K. Watson’s method [1] all the spectral lines have been fitted to the exact term values of the energy levels. Localized perturbation has been observed for K = 9 A and state mixing resulted in forbidden transitions through intensity borrowing. A complete atlas has been presented for all possible quantum numbers for the ground state levels and the accurate term values have been obtained for all possible states. According to our knowledge, this atlas represents the most accurate line positions for this species reported so far. In addition, the results have been applied to confirm and obtain very accurate wavenumbers for several FIR laser lines pumped by CO2 lasers. The present atlas may be useful as a secondary wavenumber standard in the FIR region and should be useful for astrophysical detection.

在这项工作中，C-13 取代甲醇物质的超高分辨率远红外 (FIR) 和红外 (IR) 同步辐射光谱已在整个区域以非常高的信噪比 (S/N) 记录从 40 到 5000 cm ^-1。高分辨率允许以约 0.0014 cm ^-1的前所未有的分辨率进行记录这是线的多普勒宽度的数量级。可以以± 5 KHz 的估计精度获得谱线的峰值。已经对与扭转基态相关的量子数进行了光谱分析。对于三种对称物质，已获得高达约 15 的 K 值和约 35 的 J 值的分配。已经观察到低 K 跃迁的不对称分裂，并获得了准确的不对称分裂常数。包括可用的微波 (MW) 和毫米波 (MMW) 测量，已经获得了振动状态的地面扭转状态的完整谱线分配。按照 JK Watson 的方法 [1]，所有谱线都已拟合到能级的精确项值。已经观察到 K = 9 A 的局部扰动，状态混合导致通过强度借用禁止转换。已经为基态能级的所有可能量子数提供了一个完整的图谱，并且已经获得了所有可能态的准确项值。据我们所知，该图谱代表了迄今为止报告的该物种最准确的线位置。此外，该结果已用于确认和获得由 CO2 激光器泵浦的几条 FIR 激光线的非常准确的波数。本图集可用作 FIR 区域中的二级波数标准，并应可用于天体物理检测。已经为基态能级的所有可能量子数提供了一个完整的图谱，并且已经获得了所有可能态的准确项值。据我们所知，该图谱代表了迄今为止报道的该物种最准确的线位置。此外，该结果已用于确认和获得由 CO2 激光器泵浦的几条 FIR 激光线的非常准确的波数。本图集可用作 FIR 区域中的二级波数标准，并应可用于天体物理检测。已经为基态能级的所有可能量子数提供了一个完整的图谱，并且已经获得了所有可能态的准确项值。据我们所知，该图谱代表了迄今为止报道的该物种最准确的线位置。此外，该结果已用于确认和获得由 CO2 激光器泵浦的几条 FIR 激光线的非常准确的波数。本图集可用作 FIR 区域中的二级波数标准，并应可用于天体物理检测。结果已用于确认和获得由 CO2 激光器泵浦的几条 FIR 激光线的非常准确的波数。本图集可用作 FIR 区域中的二级波数标准，并应可用于天体物理检测。结果已用于确认和获得由 CO2 激光器泵浦的几条 FIR 激光线的非常准确的波数。本图集可用作 FIR 区域的二级波数标准，并应可用于天体物理检测。