NONLINEAR ACOUSTIC SPECTROSCOPY ON THE REAL SQUASHING COLLECTIVE MODEIN HE-3-B

Authors
ALLES H BABKIN AV MANNINEN AJ TORIZUKA K PEKOLA JP
Citation
H. Alles et al., NONLINEAR ACOUSTIC SPECTROSCOPY ON THE REAL SQUASHING COLLECTIVE MODEIN HE-3-B, Physica. B, Condensed matter, 194, 1994, pp. 755-756
Citations number
4
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
194
Year of publication
1994
Part
1
Pages
755 - 756
Database
ISI
SICI code
0921-4526(1994)194:<755:NASOTR>2.0.ZU;2-9
Abstract
We have excited the real squashing (RSQ) collective modes in He-3-B wi th two simultaneous ultrasound pulses, yielding two-phonon absorption (TPA). We also detected TPA using single-frequency high-intensity soun d pulses. The Zeeman splitting of the parametrically excited RSQ mode has been demonstrated. We checked the dispersion relations of the J = 2+ modes in zero magnetic field and extracted the collective mode velo cities directly from experiments.