MARVEL Analysis of the Measured High-Resolution Rovibronic Spectra of 90Zr16O.
2018
Zirconium oxide(ZrO) is an important astrophysical molecule that defines the S-star classification class for cool
giant stars. Accurate, empirical rovibronic
energy levels, with associated labels and uncertainties, are reported for 9 low-lying electronic states of the diatomic 90Zr16O molecule. These 8088 empirical
energy levelsare determined using the Marvel (Measured Active Rotational-Vibrational
Energy Levels) algorithm with 23 317 input assigned transition frequencies, 22 549 of which were validated. A temperature-dependent partition function is presented alongside updated spectroscopic constants for the 9 low-lying electronic states.
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