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| VOLUME 27 (1978) | ISSUE 5 |
PAGE 260
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Position and width of Q-band of nitrogen molecules in cryogenic mixtures
Akhmanov S.A., Gadzhiev F.N., Koroteev N.I., Orlov I.L., Shumai I.L.
We measured the broadening and shift of the center of the vibrational resonance ν = 2326.5 cm-1 of liquid nitrogen following addition of liquified argon and oxygen. In the N2-Ar mixture, the line width increases monotonically from 2 GHz in pure N2 to 4 GHz at 60% Ar and more, and in the N2-02 mixture a maximum width ~2.4 GHz is reached at 40% concentration of 02, followed by a narrowing of the line. The shift induced by Ar is almost twice as large as the shift produced by 02, and at 70% concentration of Ar it amounts to 15 GHz. The exprimental data are interpreted within the framework of the theory of impact broadening of lines in a liquid, using the concept of "collapse" of the Q band on account of the collisions that participate in the liquid phase.
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![](/ps/1548/article_23688_800_head.png "We measured the broadening and shift of the center of the vibrational resonance ν = 2326.5 cm<sup>-1</sup> of liquid nitrogen following addition of liquified argon and oxygen. In the N<sub>2</sub>-Ar mixture, the line width increases monotonically from 2 GHz in pure N<sub>2</sub> to 4 GHz at 60% Ar and more, and in the N<sub>2</sub>-0<sub>2</sub> mixture a maximum width ~2.4 GHz is reached at 40% concentration of 0<sub>2</sub>, followed by a narrowing of the line. The shift induced by Ar is almost twice as large as the shift produced by 0<sub>2</sub>, and at 70% concentration of Ar it amounts to 15 GHz. The exprimental data are interpreted within the framework of the theory of impact broadening of lines in a liquid, using the concept of "collapse" of the <b><i>Q </i></b>band on account of the collisions that participate in the liquid phase.")