Abstract
A tunable far-infrared laser sideband spectrometer was used to investigate a nitric oxide sample enriched in 18O between 0.99 and 4.75THz. Regular, electric dipole transitions were recorded between 0.99 and 2.52THz, while magnetic dipole transitions between the 2Π1/2 and 2Π3/2 spin-ladders were recorded between 3.71 and 4.75THz. These data were combined with lower frequency data of N18O (unlabeled atoms refer to 14N and 16O, respectively), with rotational data of NO, 15NO, N17O, and 15N18O, and with heterodyne infrared data of NO to be subjected to one isotopic invariant fit. Rotational, fine and hyperfine structure parameters were determined along with vibrational, rotational, and Born–Oppenheimer breakdown corrections. The resulting spectroscopic parameters permit prediction of rotational spectra suitable for the identification of various nitric oxide isotopologs especially in the interstellar medium by means of rotational spectroscopy.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
