Observation of ballistic phonons in silicon crystals induced by. alpha. particles

Journal Article · Mon Jun 04 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2795· OSTI ID:6883073

Young, B A; Cabrera, B; Lee, A T ^[1]

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1. Physics Department, Stanford University, Stanford, California 94305 (US)

We have observed the ballistic-phonon-focusing pattern along the (100) axis of a 1-mm-thick silicon crystal using {alpha}-particle bombardment as the phonon source. These experiments on phonon-mediated particle detection are performed in vacuum at about 400 mK and use titanium-superconducting-transition-edge phonon sensors on the crystal surfaces. The ballistic time of flight is confirmed in one experiment and the focusing patterns are spatially resolved in another. These data indicate that about 1/3 of the phonon energy striking the back face during the first {mu}sec is ballistic.

• DOE Contract Number: AM03-76SF00326
• OSTI ID: 6883073
• Journal Information: Physical Review Letters; (USA), Vol. 64:23; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON
PHONONS
ALPHA PARTICLES
COINCIDENCE METHODS
EXPERIMENTAL DATA
FOCUSING
MONTE CARLO METHOD
PHYSICAL RADIATION EFFECTS
PULSES
SUPERCONDUCTING DEVICES
TEMPERATURE DEPENDENCE
TIME-OF-FLIGHT METHOD
ULTRALOW TEMPERATURE
CHARGED PARTICLES
COUNTING TECHNIQUES
DATA
ELEMENTS
INFORMATION
NUMERICAL DATA
QUASI PARTICLES
RADIATION EFFECTS
SEMIMETALS
360603* - Materials- Properties