PRESSURE-INDUCED INFRARED ABSORPTION OF HYDROGEN IN HYDROGEN-NEON AND HYDROGEN-KRYPTON MIXTURES AT $300^{\circ} K$.
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Date
1967
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Ohio State University
Abstract
The pressure-induced infrared absorption of the fundamental band of hydrogen in hydrogen-neon and hydrogen-krypton mixtures was studied at room temperature at a path length of 25.8 cm at pressures up to 400 atmospheres for several base pressures of hydrogen. In the absorption profiles of the band in hydrogen-neon mixtures, the O and S lines are very weak and the Q branch shows a pronounced splitting into two well-resolved components $Q_{P}$ and $Q_{R}$. In these contours a doublet structure appears in the S(1) line at all pressures studied, while there is an indication of the same in the $Q_{P}$ component at low pressures. In the contours in hydrogen-krypton mixtures, the O and S lines are much stronger than the corresponding lines in hydrogen-neon mixtures; the splitting of the Q branch is less pronounced; and at higher pressures, there is an indication of the $Q_{o}$ component besides $Q_{P}$ and $Q_{R}$. Integrated absorption coefficients were measured and the binary and ternary absorption coefficients were derived for the fundamental band in each of the mixtures studied. The theory of Van $Kranendonk^{1}$ was used to calculate the binary absorption coefficients of the individual lines of the O and S branches and of the quadrupole parts of the Q branch of the band in these mixtures, and the overlap parts of the binary absorption coefficients were then estimated from the experimental values of the total binary absorption coefficients. Similar calculations were made for the same band in the binary mixtures of hydrogen with helium, argon and nitrogen and the corresponding overlap parts were obtained from the experimental data of the earlier $workers.^{2}$ Work on the analysis of the absorption profiles of the fundamental band of hydrogen obtained in the present studies is in progress at the time of preparation of this abstract and the results of this part will also be presented.
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Author Institution: Department of Physics, Memorial University of Newfoundland St. John's, Newfoundland, Canada.
$^{1}$ J. Van Kranendonk, Physica 23, 825 (1957); 24, 347 (1958). $^{2}$ W. F. J. Hare and H.L. Welsh, Can. J. Phys, 36 88 (1958).
$^{1}$ J. Van Kranendonk, Physica 23, 825 (1957); 24, 347 (1958). $^{2}$ W. F. J. Hare and H.L. Welsh, Can. J. Phys, 36 88 (1958).