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Microscopic calculation of the heat transfer between a granular structure and liquid3He

Research output: Contribution to journalJournal article

Published

Journal publication date07/1986
JournalJournal of Low Temperature Physics
Journal number1-2
Volume64
Number of pages7
Pages21-27
Original languageEnglish

Abstract

A recent formula for the heat transfer coefficient between 3He quasiparticles and phonons of a sintered metallic powder is evaluated using the phonon density of states of a microscopic model of a granular structure. The microscopic model describes a simple crystalline granular structure and contains extended modes only. When the dominant phonon wavelength is less than a typical grain size, possesses a low-temperature enhancement typical of a sintered metallic powder and over a limited range exhibits a linear variation with temperature.