Knowledge Bank

The bending fundamental of methane has been examined with a tunable semiconductor diode laser (resolution $\sim$ 10$\mathrm{<mrow\; data-mjx-texclass="ORD">-4</mrow>}$ $cm-1$) in the region 1300 -- 1340 $cm-1$ The relative intensities and separations of the component lines of the transitions R(2) to R(6) have been measured, and much of the Q branch structure has been resolved. Tetrahedral splitting parameters obtained from these data will be compared with the most recent published analyses of this $band,1,2$ which are based on spectra taken at $0.05cm-1$ $resolution.3$ The intensity distribution in the band will be discussed also.