The angular distribution of phonons radiated from a heated solid surface into liquid4He. II. Cleaved sodium fluoride (100) faces
- 6 February 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (3) , 300-315
- https://doi.org/10.1088/0022-3719/8/3/009
Abstract
For pt.I see ibid., vol.8, 289 (1975). Detailed measurements of the angular distribution of phonons radiated from the cleaved (100) faces of sodium fluoride crystals pulse heated to 0.9K1or approximately=85%) of the energy flux across the interface at all source temperatures, and its variation with source temperature T1 corresponds well to the temperature dependence of the excess Kapitza conductance observed in steady heat flow experiments for a wide variety of materials. This temperature dependence is consistent with a threshold energy for transmission into the background of approximately 5K.Keywords
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