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Figure 4
Boltzmann plot for the B1Σ+–X1Σ+ (0,0) band of 12C16O for three different setups: the supersonic molecular jet, the windowless cell at room temperature (RT) and the heated windowless cell (HT). The individual plots are shifted by an arbitrary amount along the ordinate axis for clarity. The slopes of the fitted straight lines are related to the rotational temperature of the gas. The circles correspond to transitions of the P branch; squares are for the R branch. No differentiation between the P and R transitions has been introduced to the fitting procedure. |