Phonons, Librons, and the Rotational State J = 1 in HCP and FCC Solid Hydrogen by Neutron Spectroscopy

15 August 1972

journal article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 57 (4) , 1726-1733
https://doi.org/10.1063/1.1678461

Abstract

Transitions between the rotational states J = 1 and J = 0 and the densities of phonon and libron states are investigated by incoherent inelastic neutron scattering at 4.2 and at 1.15°K for several concentrations c of the ortho component. By extrapolation of the observed c‐dependent energy of the J = 1 state to c = 0 and c = 1 the effective quadrupole‐quadrupole coupling constant is determined. The observations on the densities of phonon and libron states are compared to theoretical predictions.

Keywords

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