Knowledge Bank

The absorption spectrum of $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}CF4$ has been recorded at room temperature in the range $591-675cm-1$ with a resolution of about $0.010cm-1$. The rotational structure of the $\nu 4$ band has been analyzed up to $J\prime =70$. A total a 869 line clusters have been fitted with an overall standard deviation of $0.003cm-1$, giving rise to the following set of spectroscopic constants (in $cm-1$): m = 631.20029 (27) n = 0.5215235 (66) p = 1.26242 $(85)\times 10-4$ q = -6.210 $(18)\times 10-7$ g = -2.6682 $(24)\times 10-5$ h = 1.2981 $(38)\times 10-7$ $z\prime =-2.01(26)\times 10-11$ The quoted errors are one standard deviation. A number of transitions belonging to hot bands have also been identified. The analysis of the strongest of them presumably $\nu 2+\nu 4-\nu 2$, is presently in progress.