Observations of the Motion of Single Electrons in Liquid Helium

We have developed an apparatus which can be used to monitor the motion of individual electrons in liquid helium. A sound wave is used to explode an electron bubble for a fraction of a microsecond. While the bubble is expanded, it is illuminated by light from a flash lamp. We describe the details of...

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Veröffentlicht in:Journal of low temperature physics 2007-08, Vol.148 (3-4), p.199-206
Hauptverfasser: Guo, Wei, Maris, Humphrey J.
Format: Artikel
Sprache:eng
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Zusammenfassung:We have developed an apparatus which can be used to monitor the motion of individual electrons in liquid helium. A sound wave is used to explode an electron bubble for a fraction of a microsecond. While the bubble is expanded, it is illuminated by light from a flash lamp. We describe the details of the experiment and show results obtained. In some cases, an electron is seen to follow a snakelike path. Our tentative explanation is that the electron is sliding along a quantized vortex line. If this interpretation is correct, the recorded track of the electron provides an image of the path of the vortex.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-007-9373-2