Experimental energy levels of 12C14N through MARVEL analysis
Abstract
The cyano radical (CN) is a key molecule across many different factions of astronomy and chemistry. Accurate, empirical rovibronic energy levels with uncertainties are determined for 8 doublet states of CN using the (Measured Active Rotational-Vibrational Energy Levels) algorithm. transitions were validated from different published sources to generate spin-rovibronic energy levels. The empirical energy levels obtained from the analysis are compared to current energy levels from the line list. The transition frequencies are updated with energy level data which brings the frequencies obtained through experimental data up to 77.3\% from the original 11.3\%, with 92.6\% of the transitions with intensities over 10-23 cm/molecule at 1000 K now known from experimental data. At 2000 K, 100.0\% of the partition function is recovered using only energy levels, while 98.2\% is still recovered at 5000 K.
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