A pulsed NMR study of sup 3 He- sup 4 He solutions

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00162959· OSTI ID:7246386

Owers-Bradley, J R; Wightman, D R; Child, A; Bedford, A; Bowley, R M ^[1]

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1. Univ. of Nottingham (United Kingdom)

The authors report a study of the Leggett-Rice effect in dilute {sup 3}He-{sup 4}He solutions at a Larmor frequency of 71 MHz. They measured the height and phase of the spin echoes following 2-pulse NMR sequences of three solutions with {sup 3}He concentrations of 0.56%, 1.4%, and 4.0%. The theory of Leggett fits the data extremely well and yields values of the parameter {mu}M{sub 0} and the transverse diffusion coefficient D. The authors are also able to evaluate {mu}M{sub 0} and D by analyzing multiple spin echoes and find good consistency between the two methods. From values of {lambda}/(1 + F{sub 0}{sup a}) at various concentrations, they are able to determine the scattering length for {sup 3}He quasiparticles, a, quite accurately. They find a = {minus}0.97 {plus minus} 0.03 {angstrom}.

• OSTI ID: 7246386
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 88:3-4; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MIXTURES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
RESONANCE
SOLUTIONS
SPIN ECHO
STABLE ISOTOPES