Knowledge Bank

In view of the excellent results obtained for the internuclear distances in nitrous oxide from a study of the $\mathrm{<mrow\; data-mjx-texclass="ORD">15</mrow>}N218O$ bands in the near $infrared,1$ further high resolution observational data were obtained both in the near infrared ($2-3\mu$ region) as well as at the longer wavelengths (8 micron region). In the near infrared the resolving power was such that half value widths of about $0.025-0.03cm-1$ were measured on unblended lines. A liquid helium cooled Ge:Hg detector was used at $8\mu$, and the resolution was slightly better than $0.05cm-1$. The effects of Fermi resonance in the $\mathrm{<mrow\; data-mjx-texclass="ORD">15</mrow>}N218O$ molecule will be discussed employing the observational data for the following completed polyads: $(1000,0200),(1110,0310),(1001,0201),(1111,0311),(2001,1201,0401)$.