Results of experiments on iodine dissociation in active medium of oxygen-iodine laser

Marsel V. Zagidullin; Nickolay A. Khvatov; Mikhail S. Malyshev

doi:10.1117/12.2257789

13 January 2017 Results of experiments on iodine dissociation in active medium of oxygen-iodine laser

Marsel V. Zagidullin, Nickolay A. Khvatov, Mikhail S. Malyshev

Proceedings Volume 10254, XXI International Symposium on High Power Laser Systems and Applications 2016; 102540I (2017) https://doi.org/10.1117/12.2257789
Event: XXI International Symposium on High Power Laser Systems and Applications, 2016, Gmunden, Austria

Abstract

Results of experiments on dissociation of iodine molecules in the presence of singlet oxygen molecules are presented for wide range of oxygen-iodine media composition. Rate constants values have been obtained: 4.3⋅10^-17cm³/s for the reaction O₂(¹Δ)+O₂(¹Δ)→O₂(¹Σ) +О₂(³Σ) − (1), 2.8⋅10^-13 cm³/s for the reactionO₂(¹Δ)+I(²P_1/2)→O₂(¹Σ)+I(²P_3/2) − (4) and 8.3⋅10-11 cm³/s for the reaction O₂(¹Σ) +I₂→О₂(³Σ)+2I − (2). Analysis of experiments shows that for the wide range of oxygen-iodine medium composition the dissociation occurs via the chain of reactions (1), (2), O₂(¹Δ)+I(²P_3/2)→О₂(³Σ)+I(²P_1/2), (4) and via cascade process I₂+I(²P_1/2)→I₂(v)+I(²P_3/2), I₂(v)+O₂(¹Δ)→2I+О₂(³Σ). Contributions of each mechanism in the dissociation of the iodine are comparable for the typical composition of the active medium of the supersonic chemical oxygen-iodine laser. The experiments did not reveal the contribution of vibrationally excited oxygen molecules in the dissociation of iodine. Thus, the experiments and the following conclusions are fully confirmed iodine dissociation mechanism previously proposed by Heidner et al. (J. Phys. Chem., 87, 2348 (1983)).

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Marsel V. Zagidullin, Nickolay A. Khvatov, and Mikhail S. Malyshev "Results of experiments on iodine dissociation in active medium of oxygen-iodine laser", Proc. SPIE 10254, XXI International Symposium on High Power Laser Systems and Applications 2016, 102540I (13 January 2017); https://doi.org/10.1117/12.2257789

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