Excitation spectroscopy of jet-cooled ozone: The Huggins system

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Abstract
Excitation spectra of rotationally cooled ozone have been taken in the Huggins band (λ∼325 nm). The extreme rotational cooling, achieved by supersonic expansion (Trot ∼3 K) has allowed partial resolution of rotational structure in the (501) and (600) band systems. Rotational contour analysis of these bands has led to the conclusion that the excited state responsible for the Huggins system is the 1B2 state (the same as for the Hartley system). From the contour analysis we also obtain an upper bound on the lifetime of 3.6 ps for this state and approximate inertial constants of A≊2.1 cm−1, B̄≊0.45 cm−1.