Knowledge Bank

A $0.02cm-1$ resolution study of the absorption line strengths of methane in the 3.3 $\mu m$ region at both room and reduced temperatures reveals over 200 lines with strengths between $1\times 10-2$ and $5\times 10-5cm-2atm-1$ at 296 K which belong to the $2\nu 2$ band. Most of these lines can be assigned with the aid of combination differences, experimental values for $E\prime \prime$ and a preliminary energy level calculation.