Nuclear spin-spin relaxation of isotopic impurities in solid hydrogen

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.2800· OSTI ID:7047546

Rall, M; Zhou, D; Kisvarsanyi, E G; Sullivan, N S ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

We report systematic studies of the transverse nuclear spin-spin relaxation times {ital T}{sub 2} of HD impurities in solid H{sub 2}. The experimental results indicate three different temperature regimes: (1) an exponential temperature dependence at high temperatures, (2) a minimum in {ital T}{sub 2} for 7 K{lt}{ital T}{lt}11 K, and (3) an approximately temperature-independent region for 1.5 K{lt}{ital T}{lt}7 K. The latter is attributed to the quantum diffusion of the impurities at low temperatures. At very low temperatures (0.10 K{lt}{ital T}{lt}1.5 K), {ital T}{sub 2} increases approximately linearly with temperature. This is attributed to the formation of bound ortho-H{sub 2} pairs. The behavior in the intermediate-temperature regime is analyzed in terms of vacancy-impurity scattering with quantum tunneling of vacancies.

• OSTI ID: 7047546
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:6; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CRYSTALS
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
IMPURITIES
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
MOLECULAR CRYSTALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
QUANTUM CRYSTALS
RELAXATION
SPIN-SPIN RELAXATION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K