Knowledge Bank

Rotational spectra of six isotopomers of the van der Waals dimer $Ne-N2O$ were measured in the frequency range from 5 to18 GHz using a pulsed beam cavity Fourier transform spectrometer. The spectra indicate that the complex is a prolate near symmetric rotor with a T-shaped structure. The Ne atom is on average closer to the O atom than to the terminal N atom. Both {a}- and {b}-type transitions were measured. The nuclear quadruple hyperfine pattern due to two $\mathrm{<mrow\; data-mjx-texclass="ORD">14</mrow>}N$ nuclei were resolved. Rotational and centrifugal distortion constants were determined, as well ay The nuclear quadrupole coupling constants $\chi aa(1),\chi bb(1),\chi aa(2),\chi bb(2)$. Effective values for the distance from the center of mass of the $N2O$ subunit to the Ne atom, and for the angle between this distance and the $N2O$ axis were obtained.