Two-level model of i2 molecule vibrational excitation and relaxation in the oxygen iodine laser medium

The equivalent two level model of iodine molecule vibrational excitation and relaxation in the oxygeniodine laser medium taking into account the I2 dissociation is carried out. In this model the system of equations for populations of I2(X,v) molecules on vibrational levels v=0 - 45 is reduced to two equations for total populations of iodine molecules on vibrational levels v=11 - 24 and v>24. The effective deactivation rate constants for I2(X,11≤v≤24) and I2(X,v≥25) molecules at collisions with N2 and O2 molecules taking into account the conditions of chemical oxygen iodine laser medium are found.