HCN TRANSITIONS RESPONSIBLE FOR LASER ACTION IN THE SO-CALLED CN LASER.
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Date
1967
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Ohio State University
Abstract
The four laser lines near 337 microns which have been observed in the so-called CN laser have been explained as due to ${\Delta}J = - 1$ transitions involving the $11^{1}0$ and $04^{\circ}0$ vibrational levels of HCN. The laser action seems to arise from a large population inversion which favors vibrational levels involving C-N stretching vibrations. Transitions between the $11^{1}0$ and $04^{\circ}0$ levels are observed because of the mixing of the two levels due to a Coriolis interaction. The 129 micron lines are similarly explained as due to transitions between the $12^{\circ}0$ and $05^{1e}0$ and the $12^{2d}$ and $05^{1d}0$ levels. The 211 micron lines probably arise from the $13^{1}0$ and $06^{2}0$ levels.
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Author Institution: National Bureau of Standards