Scattering Properties of Spin-polarized 3He-HeII Mixtures at Low Temperature

Ayman S. Sandouqa

Abstract


The cross sections and the man free path of 3He? atoms in HeII background are calculated. The Ramsauer-Townsend effect in the cross sections is found in these mixtures at low temperatures. In the low energy limit the cross sections are dominated by the S-wave scattering. The influence of S-scattering decreases with increasing magnetic field. With increasing k, S-wave scattering tends to decrease; whereas the contribution of the higher angular-momentum waves (especially P-wave) to the scattering increases. Our results of the mean free path exhibit the 3He? atoms propagate through the HeII background with an exceedingly long mean free path and without friction.


Full Text: PDF DOI: 10.5539/mas.v6n8p32

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Modern Applied Science   ISSN 1913-1844 (Print)   ISSN 1913-1852 (Online)

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