Calculation of absorption contours and excitation selectivity of isotopic molecules ^sup 12^CO and ^sup 13^CO for implementation of photocatalytic reactions

The possibilities of the isotope-selective excitation of molecules by CO laser radiation. More specifically, the problem of determining the conditions of the preferable excitation of heavy isotope ^sup 3^C^sup 18^O compared to the light isotope ^sup 12^C^sup 18^O is set. A carbon monoxide molecule is capable of absorbing at hundreds of vibrational-rotational lines within the principal absorption band of the CO molecule over the 1200-2600 cm^sup -1^ range. Since radiation absorption is negligibly low in the frequency range below 1900 cm-1 and there are no appreciably efficient radiation sources over the 2200-2600 cm^sup -1^ range in which absorption can be observed, the 1900-2200 cm^sup -1^ frequency range is considered in this work. The presented calculations may refer to the selective excitation of the gas phase in bulk and in gas absorbed on the surface.[PUBLICATION ABSTRACT]