| Popis: |
The collision-induced enhancement absorption spectra of deuterium in its fundamental region in D2He at 77, 195, and 273 K and in D2Ne at 77, 195, 273, and 298 K have been recorded with an absorption path length of 26 cm for gas densities up to 670 amagat for several base densities of deuterium. At each experimental temperature, binary and ternary absorption coefficients for the fundamental band were derived from the measured integrated intensities. The theory of the “exponential-4” model for the induced dipole moment of the colliding pair of molecules was applied to the binary absorption coefficients. The overlap parts of these coefficients were obtained by subtracting the calculated quadrupolar parts from the experimental values. The magnitude parameter λ, and the range ϱ, of the overlap part of the induced dipole moment, were determined for the colliding molecular pairs D2He and D2Ne by obtaining the best fit of the calculated overlap part of the binary absorption coefficients as a function of temperature to the experimental values of the overlap part. Derived parameters λ, ϱ, and the overlap induced dipole moment μ(σ) (at the Lennard-Jones intermolecular diameter σ) for D2He and D2Ne are as follows. Mixture λ ϱ μ(σ) D2He 4.7 × 10−3 0.24 A 2.55 × 10−2 ea0 D2Ne 8.5 × 10−3 0.26 A 4.56 × 10−2 ea0 |
