ИСТИНА

Based on studies of rate constants of main reactions with participation of metal-containing species including gas-phase FeO it was found that chemical composition of impact-produced Benešov meteoroid cloud during bolide and wake phases is in the equilibrium at typical temperatures (about 3000 K) of appearance of strong molecular bands. Comparing hydrodynamic and chemical timescales during the laboratory experiments for simulation of conditions of appearance of FeO orange bands during bolide events one can conclude that quenching of chemical composition of laser-produced cloud occurs at 1700 – 2200 K. These temperatures are significantly lower than temperature range (3100 – 5300 K) at which the most intensive FeO orange bands were detected during the laser experiment.