학술논문
High-resolution millimeter-wave spectroscopy of CH$_2$DCl: paving the way for future astronomical observations of chloromethane isotopologues
Document Type
Working Paper
Author
Source
Journal of Quantitative Spectroscopy and Radiative Transfer, Volume 248, June 2020, 106982
Subject
Language
Abstract
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.
Comment: 13 pages, 2 figures, 3 tables
Comment: 13 pages, 2 figures, 3 tables