Absolute far-infrared absorption intensities of α-Nitrogen

Publication

Reference: St. Louis Robert V., Schnepp O. (1969). Absolute far-infrared absorption intensities of α-Nitrogen. J. Chem. Phys., 50, 5177 - 5183.

Names

Title: Absolute far-infrared absorption intensities of α-Nitrogen
Abstract: The absolute intensities of the translational lattice mode absorptions of α-$N_2$ in the far infrared have been measured. The experimental values are smaller by a factor of 5 than the calculated intensities obtained from a quadrupole-induced mechanism theory. This discrepancy is discussed in terms of the model on which the theory was based. The intensity of the 50-cm$^-1$ line was found to be temperature dependent and decreased gradually between 15°K and 35°K. No discrete absorption was observed for the {3 phase above 36°K. The 50-cm$^-1$ line has a width smaller than 0.5 cm$^-1$ and the 70-cm$^-1$ line has a width of 6 cm$^-1$. Evidence was found for a decrease of the frequency of the 50-cm$^-1$ line as the phase transition temperature is approached.
Keywords: spectroscopy, transmission spectra, far-IR, band position, intensity, integrated intensity, band width, band vibration mode, temperature, ices, molecular solids, N2, alpha-N2
Content: spectral data, band list data, experimental physics

Doi

10.1063/1.1671033

Identifiers