Abstract
The reflection coefficient of longitudinal 25-GHz phonons was measured at normal incidence on quartz-liquid He4 interfaces. For clean samples, close agreement with the Khalatnikov theory was found with no indication of anomalous transmission. Samples coated with 300- paraffin, however, showed a substantially lower reflection coefficient in contact with helium. This anomalous reduction was found to depend on the phonon intensity I as I-12, in good accord with the defect model for the Kapitza conductance.
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 2317-2319 |
| Seitenumfang | 3 |
| Fachzeitschrift | Physical Review B |
| Jahrgang | 26 |
| Ausgabenummer | 4 |
| DOIs | |
| Publikationsstatus | Veröffentlicht - 1982 |
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