4.2 Article

Quantum Tunneling of He in Solid He: A New Analysis

Journal

JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 185, Issue 3-4, Pages 354-362

Publisher

SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-016-1637-2

Keywords

Tunneling; Magnetic resonance; Quantum diffusion

Funding

  1. National Science Foundation [DMR-1157490]
  2. [DMR-1303599]
  3. Direct For Mathematical & Physical Scien
  4. Division Of Materials Research [1303599] Funding Source: National Science Foundation

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We discuss the analysis of the experimental values of the nuclear spin-lattice and spin-spin relaxation times for the tunneling of He as isotopic impurities in solid He. These two relaxation times cannot be described quantitatively using a unique correlation time although it is often presented as such in the literature. In this paper, we discuss how to distinguish the high-frequency portion of the spectral densities that determine the spin-lattice relaxation rates from the low-frequency components which determine the spin-spin relaxation rates.

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