Bibliographic Details
| Title: |
Collision-induced fundamental band of D2 in D2–N2 and D2–CO mixtures |
| Authors: |
Varghese, G.1, Stamp, C.1, Reddy, S. Paddi spreddy@physics.mun.ca |
| Source: |
Journal of Quantitative Spectroscopy & Radiative Transfer. Sep2004, Vol. 87 Issue 3/4, p387-397. 11p. |
| Subjects: |
Infrared radiation, Mixtures, Absorption spectra, Spectrum analysis |
| Abstract: |
Enhancement spectra of the collision-induced absorption of the infrared fundamental band of D2 in D2–N2 and D2–CO binary mixtures were recorded at 298 K with an absorption cell of sample pathlength 105.2 cm. Five base densities of D2 in the range 12–20 amagat and several total gas densities of the mixtures up to 130 amagat were used. The observed spectra show the usual characteristic dip near the band origin Q1(0) of the Q branch with two well-resolved components QP and QR as well as the absorption peaks O1(3), O1(2) and S1(J), J=0 to 4. Binary and ternary absorption coefficients of the band arising from collisions of the type D2–X and D2–X–X, where X stands for N2 or CO, have been determined. The spectra are interpreted in terms of the overlap transitions Qov(J), J=0 to 4 and the following quadrupolar transitions of D2–N2 and D2–CO: O1(J)(D2)+Q0(J)(N2/CO); Q1(J)(D2)+Q0(J)(N2/CO); S1(J)(D2)+Q0(J)(N2/CO) and Q1(J)(D2)+S0(J)(N2/CO) with J=0 to 4 for D2 and J=0 to 25 for N2/CO. An analysis of the absorption profiles was carried out by assuming appropriate line shape functions for the short-range overlap and for long-range quadrupolar contributions. Characteristic half-width parameters δd and δc for the overlap-induced transitions and δq for the quadrupole-induced transitions were obtained from the profile analysis. Although CO has a small permanent electric dipole moment, present analysis does not indicate any detectable contribution from the electric dipolar induction mechanism in D2–CO mixtures. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
