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Muon motion in titanium hydrideMotional narrowing of the transverse-field muon spin rotation signal was observed in gamma-TiH(x) for x = 1.83, 1.97, and 1.99. An analysis of the data for TiH1.99 near room temperature indicates that the mechanism responsible for the motion of the muon out of the octahedral site is thermally activated diffusion with an attempt frequency comparable to the optical vibrations of the lattice. Monte Carlo calculations to simulate the effect of muon and proton motion upon the muon field-correlation time were used to interpret the motional narrowing in TiH1.97 near 500 K. The interpretation is dependent upon whether the Bloembergen, Purcell, and Pound (BPP) theory or an independent spin-pair relaxation model is used to obtain the vacancy jump rate from proton NMR T1 measurements. Use of BPP theory shows that the field-correction time can be obtained if the rate of motion of the muon with respect to the rate of the motion for the protons is decreased. An independent spin-pair relaxation model indicates that the field-correlation time can be obtained if the rate of motion for the nearest-neighbor protons is decreased.
Document ID
19880014863
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Kempton, J. R.
(Tri-Univ. Meson Facility, Vancouver (British Columbia), United States)
Petzinger, K. G.
(Tri-Univ. Meson Facility, Vancouver (British Columbia), United States)
Kossler, W. J.
(Tri-Univ. Meson Facility, Vancouver (British Columbia), United States)
Schone, H. E.
(Tri-Univ. Meson Facility, Vancouver (British Columbia), United States)
Hitti, B. S.
(Tri-Univ. Meson Facility, Vancouver (British Columbia), United States)
Stronach, C. E.
(Virginia State Univ. Petersburg., United States)
Adu, N.
(Virginia State Univ. Petersburg., United States)
Lankford, W. F.
(George Mason Univ. Fairfax, VA., United States)
Reilly, J. J.
(Brookhaven National Lab. Upton, NY., United States)
Seymour, E. F. W.
(Warwick Univ. Coventry, United Kingdom)
Date Acquired
September 5, 2013
Publication Date
February 29, 1988
Publication Information
Publication: Virginia State Univ., Materials Science with Muon Spin Rotation
Subject Category
Solid-State Physics
Accession Number
88N24247
Funding Number(s)
CONTRACT_GRANT: DE-AC02-76CH-00016
CONTRACT_GRANT: NSF DMR-85-03223
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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