Vol. 10, issue 01, article # 4
pdf Kireev S. V., Shnyrev S. L. Influence of the collisional energy transfer from the I2 energy levels excited with a He-Ne (633 nm) laser on its fluorescence in the atmosphere. // Atmospheric and oceanic optics. 1997. V. 10. No. 01. P. 18-21.Copy the reference to clipboard
Abstract:
We discuss here the influence of the collisional energy transfer from the excited vibrational energy levels of B-state of I2-127 and I2-129 isotopes on I2 fluorescence. A He-Ne (633 nm) laser is used as a source of the fluorescence excitation. The calculations and experimental measurements have shown the process to lead to a change in the population of the excited vibrational levels and, consequently, to changes in I2 fluorescence spectrum. As a result the ratio between the population of the nearest level and the initially excited one can reach 15-20% under atmospheric pressure, while the populations of more distant levels are much (about two orders of magnitude) lower. The results obtained well explain how one should allow for the influence of the energy collision transfer on the I2 fluorescence intensity that is of particular importance when detecting I2 isotopes in the atmosphere.