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Light scattering by a liquid-gas helium spray*

Published online by Cambridge University Press:  15 May 2001

Y. Ladam
Affiliation:
Centre de Recherches sur les Très Basses Températures, Laboratoire associé à l'Université Joseph Fourier, CNRS, BP 166, 38042 Grenoble Cedex 9, France
P.-E. Wolf
Affiliation:
Centre de Recherches sur les Très Basses Températures, Laboratoire associé à l'Université Joseph Fourier, CNRS, BP 166, 38042 Grenoble Cedex 9, France
P. Thibault
Affiliation:
Centre de Recherches sur les Très Basses Températures, Laboratoire associé à l'Université Joseph Fourier, CNRS, BP 166, 38042 Grenoble Cedex 9, France
L. Puech*
Affiliation:
Centre de Recherches sur les Très Basses Températures, Laboratoire associé à l'Université Joseph Fourier, CNRS, BP 166, 38042 Grenoble Cedex 9, France
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Abstract

Light scattering by liquid helium droplets or gaseous helium bubbles is strongly forward. This has two direct experimental consequences: rare scatterers are very bright in a narrow ($\ll 5^{\circ}$) angular region in the forward direction; and even in the presence of multiple scattering the intensity collected at large angles is linear in the concentration of scatterers. These properties are explained, and the second one is illustrated with a liquid-gas helium spray.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2001

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Footnotes

*

This paper has been presented at “Sixièmes journées de cryogénie et supraconductivité”, 16-19 May 2000, Aussois.

References

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