IR spectra of aqueous disperse systems adsorbing atmospheric gases: 2. Argon

摘要

The absorption, reflection, and scattering of IR radiation by aqueous ultradisperse systems that absorb argon are studied with the molecular dynamics method on the basis of a flexible molecule model. Both the real and imaginary parts of dielectric permittivity are substantially increased at frequencies corresponding to intramolecular vibrations of atoms when each cluster of aqueous system adsorbs one argon atom. This effect disappears for the real part and becomes weak for the imaginary part of dielectric permittivity when there are two argon atoms added per cluster. In the region of intramolecular frequencies, the absorption coefficient of aqueous disperse systems containing argon increases as well. The reflection coefficient of the systems of water clusters that absorbed argon decreases in the frequency region of vibrations of molecules and increases in a frequency range corresponding to intramolecular vibrations. The power of radiation generated by cluster systems at the expense of thermal energy increases considerably when there is one adsorbed argon atom per cluster and decreases with a twofold increase in the number of argon atoms in clusters.