Blackbody source and detector of ballistic quasiparticles in 3He-B: Emission angle from a wire moving at supercritical velocity

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阅读量:

33

作者:

SN FisherAM GuénaultCJ KennedyGR Pickett

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摘要:

A new quasi-particle detector and source consisting of a blackbody radiator is used to make the first measurements of the divergence of a beam of quasi-particles produced by a vibrating-wire resonator moving at supercritical velocities in superfluid (He-3)-B at the zero-temperature limit. At velocities just above the critical velocity of Delta/3pF, a very narrow beam directed along the direction of motion of the wire is seen. As the maximum wire velocity increases the beam spreads to saturate at a half-angle divergence of approximately 55 deg at a maximum velocity of order Delta/pF.

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DOI:

10.1103/PhysRevLett.69.1073

被引量:

204

年份:

1992

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2014
被引量:36

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