Phys. Rev. Lett. 29, 708–711 (1972)Evidence for Isotopic Impuritons in Solid HeliumReceived 6 March 1972; published in the issue dated 11 September 1972 Measurements of the spin diffusion coefficient D and the NMR linewidth T2-1 are reported for a 3He impurity in solid 4He at molar volume 21 cm3. For x3<3×10-2, Dx3=(1.2±0.4)×10-11 cm2 sec-1, where x3 is the fractional impurity concentration, and for x3<2×10-3, T2x3=(1.1±0.3)×10-4 sec. These results conform with a model of "impuriton" excitations or "mass fluctuation waves" in which the quasiparticles move like a gas. © 1972 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.29.708
DOI:
10.1103/PhysRevLett.29.708
PACS:
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