No abstract

Moscow, Inst. Chem.&Mech.To work out specific laser system, to optimise their operating conditions it is necessary to have a complete description of the kinetic processes in active media and exact values of the reactions rate constants. The detailed study of process kinetics in COIL were discussed at a number of papers and a review on the rate constants at oxygen-iodine media was prepared and published in Russian language. The present article is a short variant of this review.The general scheme of iodine and oxygen exited levels population is determined by reactions of energy pooling, quenching and chemical reactions with atomic and molecular iodine.The basic process which determine the COIL function principle is the energy transfer reaction from metastable oxygen to metastable atomic iodine: 02 (a'L\g) + I('P312) > O2(b3g) + I('P112 ) + AE1 400 K (1) The generation occurs on spin-orbital atomic iodine transition i(1P112) I(1p312) with the wavelength X =1,31 5 mkm. O2(b1Eg) S generated by the energy pooling reactions: 02 (a'Ag) + 02 (a'g) -> O2(b1g) + 02(b3Zg) + LtE2 3800 K (2) 02 (a'g) + I('P112 ) -> O2(b1Eg) + I(1P312) + AE3 3400 K (3) Energy losses occur in quenching of electronically exited species. O2(b1g) + M + 02 (a'Lg) + M + L\E4 = 7540 K (4) 02 (a'g) + M _> O2(b3g) + M + AE5 = 11340 K (5)

By the means of combined calorimetric and luminescence method were investigated chemical singlet oxygen gas generators in which alkaline peroxide solution is replaced by solid peroxihydrate compounds; the operating principle of the generators is based on the interaction of powder peroxihydrates and gaseous chlorine or liquid chiorinecontaining reagents.The optimal composition of synthetized solid compounds allows hydrogen peroxide to be transformed into singlet oxygen with efficiency up to 100%.The usage of working solids in comparison with liquid ones has a number of advantages related to simplicity and safety in operation of such gas generators, significant consumption characteristic improvement and overall dimensions reduction, four times increase in singlet oxygen yield per unit weight of working components and water steam content minimizing in gas stream at the gas generator exit.