Abstract
Results of calculations of Kapitza resistance and phonon reflectivity are presented for clean and dirty solid surfaces in contact with liquid helium. We suppose the existence of a thin attenuating layer of absorbed solid helium at the interface. It is shown that even 5–15 » thick layers of contamination can very significantly improve the phonon transmission near 1–2 K, and could also explain results for hydrogen, deuterium, and neon.
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