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Coupling of the Nuclear Spin Alignment of Quadrupolar Nuclei to 3He at Interfaces (1998)

Genio, E. B. ; Sullivan, N. S. ; Ihas, G. G.

Springer

Journal of low temperature physics 113 (1998), S. 323-328

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ISSN: 1573-7357

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Measurements of the relaxation of nuclear spin alignments have been carried out using NQR spin echo studies of powdered antimony in contact with liquid 3 He. This system differs from previous studies of the relaxation and magnetization coupling of 3 He at surfaces because the magnetizations 〈 S z 〉≃ 0. The spin alignments 〈 S z 2 〉 are the relevant dynamical variables. The analysis of the experimental results shows that the coupling of the nuclear spin alignment of the antimony nuclei to the magnetization of the 3 He nuclei is determined by the spectral density of the fluctuations of the spin-spin dipolar couplings at the interface. This power density is attributed to the zero-point motions (atom-atom and atom-vacancy exchange) of the 3 He atoms on the surface of the metal particles.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1022558919066

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