The influence of rotational states on the kinetic of vibrational levels of CO2. The method of rotational weight function

We study the influence of rotational states on the kinetics of vibrational levels of CO₂ using a numerical method. Spontaneous emission is considered to be the mechanism causing transitions between rotational-vibrational states. It is shown that results obtained in the generally assumed vibrational approximation can differ by factors of 5–10 from the results where rotational states are taken into account. We propose a method of rotational weight functions which takes into account rotational states in the calculation of the kinetics of vibrational levels. We also find numerical values of these weight functions and show that the results obtained differ from the exact ones by 1–3%.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 1, pp. 88–92, January, 1986.