Spin waves in liquid helium-3/sup */

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5115897

Masuhara, N

This dissertation describes measurements of collisionless spin waves in liquid /sup 3/He in the normal and superfluid A/sub 1/, A, and B phases. The spin waves were measured by transverse cw NMR at the Larmor frequencies of 1,2, and 4 MHz. The pressure range was varied from 0 to12 bar. In the normal phase sharp peaks due to spin waves appear on the NMR line shape below 5 mK. These measurements were performed at several different field gradients. The experiment agrees quite well with a theory by Leggett (1970) and permits a determination of the Fermi liquid parameter F/sub 1//sup a/. Although spin waves were observed in the A/sub 1/ phase, thus far there is no theory for their frequency and damping in this phase. In the A phase the spin waves were heavily damped except near T/sub c/. The peak frequency displays shifts which are not predicted by present theories. In the B phase the experiments agree at least qualitatively with the theory by Combescot (1975). The imaginary part of the diffusion coefficient in the B phase was determined from the experimental spin wave frequencies.

• Research Organization: Ohio State Univ., Columbus (USA)
• OSTI ID: 5115897
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DATA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HELIUM 3
HELIUM 3 A
HELIUM 3 A1
HELIUM 3 B
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
NMR SPECTRA
NUCLEI
NUMERICAL DATA
SPECTRA
SPIN WAVES
STABLE ISOTOPES