1301.3929 (S. S. Kim et al.)

NMR Investigation of the Low Temperature Dynamics of solid 4He doped
with 3He impurities    [PDF]

S. S. Kim, C. Huan, L. Yin, J. S. Xia, D. Candela, N. S. Sullivan

The lattice dynamics of solid 4He has been explored using pulsed NMR methods to study the motion of 3He impurities in the temperature range where experiments have revealed anomalies attributed to superflow or unexpected viscoelastic properties of the solid 4He lattice. We report the results of measurements of the nuclear spin-lattice and spin-spin relaxation times that measure the fluctuation spectrum at high and low frequencies, respectively, of the 3He motion that results from quantum tunneling in the 4He matrix. The measurements were made for 3He concentrations 16View original: http://arxiv.org/abs/1301.3929