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Through a treatment of three-phonon processes, the wide-angle scattering rates and the absorption rates of phonons, which characterize viscosity and ultrasonic attenuation, respectively, are calculated for ⁴He below 0.6 K. These rates are obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______1456::f0d51da2a5c39fba2ee2bc0882e006b9
http://dspace.nbuv.gov.ua/handle/123456789/175461
http://dspace.nbuv.gov.ua/handle/123456789/175461
