Journal article
Collective Excitations in Liquid Hydrogen Observed by Coherent Neutron Scattering
Coherent scattering of neutrons by liquid parahydrogen shows the existence of well-defined collective excitations in this liquid. Qualitative similarity with the scattering from liquid helium is found. Furthermore, in the range of observed wave vectors, 0.7 Å-1 ≤κ≤3.1 Å-1, extending from the first through the third Brillouin zones in the solid, S(κ,ω) is remarkably similar to the scattering law expected from a polycrystal.
For κ≤2.3 Å-1 the observed spectra satisfy the one-phonon sum rule with mean square displacement 〈u2〉=1.0 Å2.
Language: | English |
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Year: | 1973 |
Pages: | 481-485 |
ISSN: | 10797114 and 00319007 |
Types: | Journal article |
DOI: | 10.1103/PhysRevLett.30.481 |
ORCIDs: | da Costa Carneiro, Kim |