Search Results - (Author, Cooperation:R. S. Hamilton)

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  1. 1
    Staff View
    Publication Date:
    2013-07-05
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Acclimatization/genetics ; Agriculture/economics/*methods/*trends ; Biodiversity ; Biological Specimen Banks ; Breeding ; Crops, Agricultural/genetics ; Food Supply/*statistics & numerical data ; Genes, Plant ; Humans ; Phenotype ; Seeds/genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Betts, D. S. ; Brewer, D. F. ; Hamilton, R. S.
    Springer
    Published 1974
    Staff View
    ISSN:
    1573-7357
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Measurements of the thermal conduction of liquid 3 He in the collisionless regime, where the mean free path of the thermal carriers is much greater than the channel diameter, allow a direct measurement of the carrier velocity. These experiments have been done using Vycor porous glass as the channel (average diameter ∼70 Å) at temperatures down to 16 mK. They show that the carrier velocity (∼43 m/sec) is that of quasiparticles rather than of bare 3 He atoms, whose velocity would be a factor of m*/m (∼3) greater, and thus confirm quite independently of any other measurement the validity of Landau quasiparticle theory. The data also strongly suggest a zero quasiparticle specular reflection coefficient, which allows an estimate to be made of the quasiparticle lifetime. This shows that the energy levels of quasiparticle states have a width more than ten times greater thankT at 20 mK. As an incidental result, a value for the low-temperature thermal conductivity of Vycor glass has been calculated.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses