Klaus T, Saleck AH, Belov SP, Winnewisser G, Hirahara Y, Hayashi M, Kagi E, Kawaguchi K
I. Physikalisches Institut, Universitat zu Koln, Zulpicher Str. 77, Cologne, D-50937, Germany
J Mol Spectrosc. 1996 Dec;180(2):197-206. doi: 10.1006/jmsp.1996.0243.
Pure rotational spectra of rare isotopomers of sulfur monoxide, SO, have been recorded with the Cologne Terahertz Spectrometer, Germany, and the millimeter- and submillimeter-wave spectrometer at Nobeyama, Japan. In total, 176 new transitions have been measured in the X3Sigma- electronic ground state, including the first laboratory detection of the rare isotopomer 36SO. New lines are also reported for 33SO and S17O in their vibrational ground states, and for 33SO and S18O in the first excited vibrational state. A simultaneous fit of 451 transitions has led to an improved set of isotopically invariant parameters for rotation and fine structure. Hyperfine structure constants for 33SO and S17O have been obtained also from the global fit, including first values for the magnetic nuclear spin-rotation interaction. These are compared to other molecules. The isotopically invariant parameters allow precise frequency predictions for the submillimeter-wave region far beyond 1 THz for all SO isotopomers, of importance to astrophysical applica- tions.
利用德国的科隆太赫兹光谱仪以及日本野边山的毫米波和亚毫米波光谱仪，记录了一氧化硫（SO）稀有同位素异构体的纯转动光谱。总共在X³Σ⁻电子基态中测量到了176条新跃迁，其中包括首次在实验室检测到稀有同位素异构体³⁶SO。还报告了³³SO和¹⁷OS在振动基态以及³³SO和¹⁸OS在第一激发振动态的新谱线。对451条跃迁进行的同时拟合得到了一组改进的用于转动和精细结构的同位素不变参数。³³SO和¹⁷OS的超精细结构常数也通过全局拟合得到，包括磁核自旋 - 转动相互作用的首个值。将这些与其他分子进行了比较。这些同位素不变参数能够对所有SO同位素异构体在远超过1太赫兹的亚毫米波区域进行精确的频率预测，这对天体物理应用很重要。
