FOURIER-TRANSFORM EMISSION-SPECTROSCOPY OF THE A'3-PI-X3-EPSILON- TRANSITION OF PTO

A new 3Π electronic state of PtO has been observed between 7100 and 8015 cm-1 above the ground state. Three independent electronic systems connecting Ω′ = 0+, 1, and 2 in the upper state to Ω″ = 1 in the ground state have been recorded in emission from a Pt hollow cathode with the Fourier transform spectrometer associated with the McMath solar telescope at Kitt Peak. We interpret these three transitions as arising from the spin components of a new A′3Π-X3Σ- transition in Hund's case (a) notation. Molecular constants (including Ω-doubling parameters) for the new electronic state have been determined from the analysis of the data. © 1991.