Department of Chemistry, The University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
J Chem Phys. 2012 Oct 7;137(13):134308. doi: 10.1063/1.4757018.
In view of recent tremendous advance in astronomical observations in the submillimeter to THz region brought by the Herschel space craft, laboratory high-resolution spectroscopic investigations in that frequency region into unstable molecules, in particular, light hydride ions, are urgently needed. As a part of such endeavor, rotational transitions of H(2)F(+) were observed in the THz-region by using a tunable far-infrared spectrometer. These newly detected lines together with the submillimeter-wave lines obtained previously and the combination differences derived from infrared vibration-rotation lines were subject to a least-squares analysis that yielded a set of molecular constants with much better accuracy. The measured and predicted THz transition frequencies should prove to be a useful probe into detection of interstellar H(2)F(+).
鉴于赫歇尔太空船在亚毫米波到太赫兹区域的天文观测取得了巨大进展，迫切需要在该频率区域对不稳定分子，特别是轻氢化物离子进行实验室高分辨率光谱学研究。作为这一努力的一部分，使用可调谐远红外光谱仪在太赫兹区域观察到了 H(2)F(+)的转动跃迁。这些新检测到的谱线与之前获得的亚毫米波谱线以及从红外振转谱线推导出来的组合差一起，经过最小二乘法分析，得到了一组具有更高精度的分子常数。测量和预测的太赫兹跃迁频率有望成为探测星际 H(2)F(+)的有用工具。
