The dramatic increase in sensitivity, spectral coverage and resolution of radio astronomical facilities in recent years has opened new possibilities for observation of chemical differentiation and isotopic fractionation in protostellar sources to shed light on their spatial and temporal evolution. In warm interstellar environments, methanol is an abundant species, hence spectral data for its isotopic forms are of special interest. In the present work, the millimeter-wave spectrum of the ¹³CH₃OD isotopologue has been investigated over the region from 150 to 510 GHz to provide a set of transition frequencies for potential astronomical application. The focus is on two types of prominent ¹³CH₃OD spectral groupings, namely the a-type ^qR-branch multiplets and the b-type Q-branches. Line positions are reported for the ^qR(J) clusters for J = 3 to 10 for the v_t = 0 and 1 torsional states, and for a number of v_t = 0 and 1 ^rQ(J) or ^pQ(J) line series up to J = 25. The frequencies have been fitted to a multi-parameter torsion-rotation Hamiltonian, and upper level excitation energies have been calculated from the resulting molecular constants.

近年来，射电天文设施的灵敏度，频谱覆盖范围和分辨率的急剧增加，为观测原恒星源中的化学差异和同位素分馏开辟了新的可能性，以阐明其时空演化。在温暖的星际环境中，甲醇是一个丰富的物种，因此，有关其同位素形式的光谱数据特别受关注。在目前的工作中，已经研究了¹³ CH ₃ OD同位素分子在150至510 GHz范围内的毫米波频谱，从而为潜在的天文应用提供了一组过渡频率。重点是两种突出的¹³ CH ₃ OD光谱组，即a型^q R分支多重性和b型Q分支。报告了在 v _t  = 0和1扭转状态下J = 3到10的^q R（J）簇的行位置，以及在v _t  = 0和1 ^r Q（J）或^p Q（J）线系列，直到J  =25。频率已拟合到多参数扭转旋转哈密顿量，并且根据所得的分子常数计算了上级激发能。