Department of Physics Papers

Document Type

Journal Article

Date of this Version

10-15-1971

Publication Source

Physical Review B

Volume

4

Issue

8

Start Page

2808

Last Page

2819

DOI

10.1103/PhysRevB.4.2808

Abstract

It is shown that the "two-libron" lines in the Raman spectrum of solid hydrogen result from the large cubic anharmonicity of the quadrupole-quadrupole Hamiltonian. A localized picture is used to describe the interaction of two librational excitations on neighboring molecules, and dynamic interactions with other molecules are treated perturbatively. In this approximation the average single-libron energy agrees with the anharmonic calculation in the accompanying paper. Using a value of the quadrupole-coupling constant obtained from the single-libron spectrum, the resulting two-libron energies and Raman transition probabilities are in excellent agreement with the observed spectrum.

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Date Posted: 12 August 2015

This document has been peer reviewed.