2017/11/01 by Mattia Melosso, Claudio Degli Esposti, C. Degli Esposti +1
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Atmospheric Ozone and Climate #Atomic physics #Chemistry #Deuterium #Ground state #Interstellar medium #Isotopologue #Millimeter #Molecular Spectroscopy and Structure #Molecule #Optics #Physics #Quantum mechanics #Rotational spectroscopy #Rotational spectrum #Rotational transition #Spectroscopy #Terahertz radiation #astro-ph.GA
paper · pdf · doi:10.3847/1538-4365/aa9220
published as Mattia Melosso et al. 2017, ApJS, 233, 15
openalex publication_date 2017/11/01 · arxiv created 2017/12/01 · arxiv updated 2017/12/04 · openalex created_date 2017/12/04 · openalex updated_date 2026/08/05
Abstract The deuteration mechanism of molecules in the interstellar medium is still being debated. Observations of deuterium-bearing species in several astronomical sources represent a powerful tool to improve our understanding of the interstellar chemistry. The doubly deuterated form of the astrophysically interesting amidogen radical could be a target of detection in space. In this work, the rotational spectrum of the ND 2 radical in its ground vibrational and electronic state has been investigated between 588 and 1131 GHz using a frequency modulation millimeter/submillimeter-wave spectrometer. The ND 2 molecule has been produced in a free-space glass absorption cell by discharging a mixture of ND 3 and Ar. Sixty-four new transition frequencies involving J values from 2 to 5 and K a values from 0 to 4 have been measured. A global analysis including all the previous field-free pure rotational data has been performed, allowing for a more precise determination of a very large number of spectroscopic parameters. Accurate predictions of rotational transition frequencies of ND 2 are now available from a few gigahertz up to several terahertz.