Sites and diffusion for muons and hydrogen in titanium hydrides

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6734509

Kossler, W J; Schone, H E; Petzinger, K; Hitti, B; Kempton, J R; Seymour, E F.W.; Stronach, C E; Lankford, W F; Reilly, J J

Low temperature sites for muons implanted in TiH/sub x/ have been found to be a mixture of interstitial and substitutional sites, with substitutional occupancy determined by the probability that a muon is an interstitial site will have a vacant nearest neighbor substitutional site. As with ZrH/sub x/, activation from the interstitial site is observed below 300/sup 0/K. From the depolarization rate in the substitutional site, the muon likely displaces the neighboring H atoms by about 0.1 A. Diffusion for the substitutional muons occurs above room temperature with an activation of about 0.38 eV, which is less than the 0.505 eV for hydrogen vacancy motion observed by NMR. To explain this the muon transition rate to a vacancy must be less than that of hydrogen.

• Research Organization: College of William and Mary, Williamsburg, VA (USA); Warwick Univ., Coventry (UK); Virginia State Univ., Petersburg (USA); George Mason Univ., Fairfax, VA (USA); Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6734509
• Report Number(s): BNL-39422; CONF-8606134-10; ON: DE87006904
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
ELEMENTARY PARTICLES
FERMIONS
HYDRIDES
HYDROGEN COMPOUNDS
INTERSTITIALS
LEPTONS
MUONS
POINT DEFECTS
TITANIUM COMPOUNDS
TITANIUM HYDRIDES
TRANSITION ELEMENT COMPOUNDS
VACANCIES