Blackbody source and detector of ballistic quasiparticles in 3He-B: Emission angle from a wire moving at supercritical velocity
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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关键词:
condensed matter physics, superconductivity and superfluidity helium 3 b quasi particles beams bolometers damping detection resonators wires electronic equipment
DOI:
10.1103/PhysRevLett.69.1073
被引量:
年份:
1992
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