Determination of the rate constants used in design calculations relating to low-temperature CO2–D2 gasdynamic lasers

A comparison of the theoretical values of the gain coefficient with those found experimentally yielded the rate constants of the processes of near-resonant vibrational exchange between CO₂(01¹1) and D₂ (1) (1.59×10³ Pa/sec), and of the vibrational–translational relaxation of CO₂(00⁰1) (2 Pa^–1 ·sec^–1) and of the bending mode of CO₂ (4×10² Pa^–1 · sec^–1) by interaction with deuterium. The temperature dependences of these constants were obtained in the range 100–800°K. The variation of the vibrational mode temperatures along the nozzle was determined.