Abstract The ν 3 fundamental band of DTO and the 2 ν 1 overtone band of HTO have been analysed for the first time from a high-resolution infrared spectrum of tritiated water vapour recorded at room temperature using a Bruker IFS 125HR Fourier transform spectrometer applying a resolution of 0 . 0075 cm - 1 . For DT16O, we report 436 new experimental line positions in the 2500– 2900 cm - 1 range that were assigned to the ν 3 band, with rotational quantum numbers up to J = 15 and K a = 8 . For HT16O, we report 361 new experimental line positions in the 4300– 4700 cm - 1 range that were assigned to the 2 ν 1 band, with rotational quantum numbers up to J = 15 and K a = 7 . For both species the assigned lines were used to determine the spectroscopic constants in the A-reduced Watson Hamiltonian. No perturbations were observed. The comparison with variational calculations of line positions and intensities from the Tomsk database shows differences of up to several 0.1 cm - 1 concerning the line positions, while the relative line intensities agree with the observed values within a few percent. The line list from this study will be useful for detection of gaseous traces of HTO using laser-based methods in the future and further serve the completion of experimental line lists.

中文翻译：

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DTO 的基本 ν3 波段和 HTO 的 2ν1 泛音波段来自氚化水蒸气的高分辨率光谱分析

摘要 使用布鲁克 IFS 125HR 傅里叶变换光谱仪在室温下记录氚化水蒸气的高分辨率红外光谱，首次分析了 DTO 的 ν 3 基带和 HTO 的 2 ν 1 泛音带。的 0 。0075 厘米 - 1 . 对于 DT16O，我们报告了 2500-2900 cm-1 范围内的 436 个新实验线位置，这些位置被分配到 ν 3 波段，旋转量子数高达 J = 15 和 Ka = 8 。对于 HT16O，我们报告了 4300-4700 cm - 1 范围内的 361 个新实验线位置，这些位置被分配到 2 ν 1 波段，旋转量子数高达 J = 15 和 Ka = 7 。对于这两个物种，指定的线用于确定 A 约化的沃森哈密顿量中的光谱常数。没有观察到扰动。与来自托木斯克数据库的线位置和强度的变分计算的比较显示线位置的差异高达几个 0.1 cm - 1，而相对线强度与观测值在几个百分点内一致。本研究的线列表将有助于在未来使用基于激光的方法检测 HTO 的气态痕量，并进一步服务于实验线列表的完成。