Abstract
Measurements of the attenuation and velocity of pulsed high-frequency sound have been performed up to 133 MHz in superfluid He3-B. A new collective mode of the order parameter was discovered at a frequency extrapolated to Tc of =(1.165+0.05)BCS(Tc), where BCS(T) is the energy gap in the weak-coupling BCS theory. The group velocity has been observed to decrease by as much as 23 of the zero-sound velocity.
Original language | English (US) |
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Pages (from-to) | 266-269 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 45 |
Issue number | 4 |
DOIs | |
State | Published - 1980 |
ASJC Scopus subject areas
- General Physics and Astronomy