EOIL系统中振动激发单线态氧分子的V-T弛豫

A. P. Torbin, M. Heaven, V. N. Azyazov
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引用次数: 0

摘要

用脉冲激光技术研究了振动激发单线态O2(a1Δ,v)分子的动力学,用266 nm脉冲激光光解臭氧产生O2(a1Δ,v)分子。通过观察O2 a1Δ-X3Σ跃迁的1268 nm荧光来跟踪O2(a1Δ)猝灭动力学。研究发现,O(3P)/O3/N2混合物中O2(a1Δ,v)的损失在化学过程和v - t过程中均有发生。我们观察到单重态氧分子的振动激发提高了O2(a1Δ,v)和O3分子之间的反应速率。该过程的速率常数估计在10-12-10-11 cm3/s范围内。O2(a,v=1)被CO2淬火的速率常数为(1.03±0.07)×10-14 cm3/s。
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V-T relaxation of vibrationally excited singlet oxygen molecule in the EOIL systems
Kinetics of vibrationally-excited singlet oxygen O2(a1Δ,v) molecule have been examined using pulsed laser technique.O2(a1Δ,v) molecules were produced by the pulsed 266 nm laser photolysis of ozone. The kinetics of O2(a1Δ) quenching were followed by observing the 1268 nm fluorescence of the O2 a1Δ-X3Σ transition. It has been found that the loss of O2(a1Δ,v) in the O(3P)/O3/N2 mixture is carried out both in chemical and in V-T process. We observed that the vibrational excitation of singlet oxygen molecule enhances the rate of reaction between O2(a1Δ,v) and O3 molecules. The rate constant of this process was estimated to be in the range 10-12-10-11 cm3/s. Rate constant of O2(a,v=1) quenching by CO2 was found to be (1.03±0.07)×10-14 cm3/s.
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