论文标题
$ _2 $ dcl的高分辨率毫米波光谱：为未来的天文观测铺平了叶绿素同位素学观察的道路
High-resolution millimeter-wave spectroscopy of CH$_2$DCl: paving the way for future astronomical observations of chloromethane isotopologues
论文作者
论文摘要
氯甲烷是迄今为止在太空中检测到的唯一有机氯化物。它最近对低质量原始IRAS IRAS 16293-2422与ALMA的观察提示了对CH $ _3 $ CL及其同位素学的新实验室研究。在这里，我们报告了对90至300 GHz之间的频率区域中的氯甲烷ch $ _2 $ dcl的旋转光谱的调查。测量已使用频率调制毫米波光谱仪进行，该光谱仪安排进行饱和光谱。通过分析两个氯同位素的超精细分辨光谱CH $ _2 $ _2 $ d $^{35} $ cl和ch $ _2 $ d $ d $^{37} $ cl，一致的精确光谱参数集已得到。这项工作提供了可靠的光谱预测，可用于指导星际介质中C $ _2 $ dcl的放射习俗搜索，并代表了对未来对单偏氯甲烷的高分辨率红外光谱进行分析的坚实基础。
Chloromethane is the only organochloride detected in space to date. Its recent observation towards the low-mass protostar IRAS 16293-2422 with ALMA offers a prompt for new laboratory studies of CH$_3$Cl and its isotopologues. Here, we report the investigation of the rotational spectrum of monodeuterated chloromethane CH$_2$DCl in the frequency region between 90 and 300 GHz. The measurements have been carried out with a frequency-modulation millimeter-wave spectrometer, arranged to perform saturation spectroscopy. From the analysis of hyperfine-resolved spectra of the two chlorine isotopologues CH$_2$D$^{35}$Cl and CH$_2$D$^{37}$Cl, consistent sets of accurate spectroscopic parameters have been obtained. This work provides reliable spectral predictions which can be used to guide radio-astronomical searches of CH$_2$DCl in the interstellar medium and represents a solid base for future analyses of high-resolution infrared spectra of monodeuterated chloromethane.
