Dissociation and Decrease of Light Absorption of a Multilevel Molecular Gas Under the Effect of the Radiation of a Powerful CO2 Laser,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The interaction of a powerful infrared radiation with the resonance absorbing gases is investigated. Examined is a cascade radiation-collision mechanism of the vibrational excitation of the molecular resonance system, which leads to the dissociation and decrease of light absorption of the gas. The propagation of the irradiating radiation in the medium is accompanied by transparency dissociation and recombination waves. The conducted experiments on the absorption of 10.6 micrometer radiation in BCl3 and SF6 gases made it possible to calculate the characteristic times of the transmission of excitation in the cascade process in these gases and also estimate the distribution of populations of molecules according to vibrational levels and the degree of dissociation.
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy