Atlas of the absorption/dissociation spectra of CO and its isotopes between 91.2 NM and 115.2 NM

Astronomy and Astrophysics – Astrophysics

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Carbon Monoxide, Infrared Spectra, Molecular Spectra, Ultraviolet Absorption, Absorption Cross Sections, Carbon Isotopes, Oscillator Strengths, Oxygen Isotopes, Photodissociation, Rydberg Series

Scientific paper

Based on the data on the CO molecule recently obtained by Eidelsberg and Rostas (1990), this paper presents a complete atlas of the UV absorption lines of the four main isotopes: (C-12)(O-16), (C-13)(O-16), (C-12)(O-18), and (C-13)(O-18) in the wavelength range 91.2 - 115.2 nm. The results are displayed in tables which contain the parameters of the absorption bands as well as the wavenumber and the wavelength of each line either observed or computed from the rotational constants of the upper electronic Rydberg state. Besides these spectroscopic data, for each transition, the absorption oscillator strength, the lifetime of the upper electronic state and its dissociation probability are also given. The set of data is available upon request, on computer compatible media. The synthetic absorption spectrum of (C-12)(O-16) in the range 91.2 - 115.2 nm, calculated for a temperature of 50 K by assuming a Boltzmann distribution of the rotational levels, is presented in graphic form.

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