Abstract
A quantum–mechanical problem on inelastic phonon scattering by a quadrupolar pair defect is discussed. As an example of the physical system, where this mechanism is of great concern, the solution of o–H 2 molecules in p–H 2 matrix is considered. The effective relaxation time τ p of a phonon collision with a pair defect as a function of the phonon frequency is calculated. Due to intrinsic degrees of freedom, pair defects give rise to the resonance phonon scattering above a certain temperature T 0 , which for o–H 2 —p–H 2 mixtures is approximately 6 ÷ 7 K.
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Antsygina, T., Chishko, K. & Slusarev, V. Mechanism of Inelastic Phonon Scattering on the Quadrupolar o–H2 Impurity in p–H2 Matrix. Journal of Low Temperature Physics 111, 503–508 (1998). https://doi.org/10.1023/A:1022228929269
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DOI: https://doi.org/10.1023/A:1022228929269