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Baym, Gordon A. Saam, William Frederick 2011-07-11T15:58:07Z 2011-07-11T15:58:07Z 10000-01-01 1968 Both the nature of phonon-quasiparticle interactions in dilute solutions of He3 in superfluid He4 and the role they play in determining the linear response prQperties of such solutions are examined. The vertices for phonon scattering and absorption by He3 quasiparticles as well as the effective interaction between quasiparticles are discussed from the microscopic theory. Much of the previous semiphenomonological theory concerning these quantities is justified. The properties of a dilute gas model for dilute solutions are worked out to first order in the gas parameter; the results provide an example and a check for the general theory. Using the phonon-quasiparticle vertices a phonon Boltzmann equation is developed. This equation is completely soluble in the absence of protons and phonon-phonon interactions, and it is used in conjunction with the quasiparticle Boltzmann equation and the superfluid equation of motion to determine the attenuation' of both first and second sound and the kinetic coefficients in dilute solutions. There is good overall agreement with available experimental results for first sound attenuation. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T15:58:07Z No. of bitstreams: 1 1968_saam.pdf: 3684824 bytes, checksum: 2f53070dd2f56bbdf22b303d1cb70c47 (MD5) Made available in DSpace on 2011-07-11T15:58:07Z (GMT). No. of bitstreams: 1 1968_saam.pdf: 3684824 bytes, checksum: 2f53070dd2f56bbdf22b303d1cb70c47 (MD5) Previous issue date: 1968 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T15:58:07Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:54-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6076052 http://hdl.handle.net/2142/25752 en 1968 William Frederick Saam phonon-quasiparticle interactions superfluid He linear response properties phonon scattering Phonon-quasiparticle interactions in dilute solutions of He3 in superfluid He4 Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.