NMR relaxation rate and the libron energy of solid hydrogen

Kazushi Sugawara; John A. Woollam

doi:10.1063/1.436662

NMR relaxation rate and the libron energy of solid hydrogen

Kazushi Sugawara, John A. Woollam

Research output: Contribution to journal › Article › peer-review

Abstract

Taking the rotational relaxation of orthohydrogen (o-H₂) in solid hydrogen into account, we have theoretically investigated the longitudinal NMR spin lattice relaxation rate T₁^-1 of o-H₂. The rate T₁^-1 is characterized by an anomalous maximum, as a function of temperature, at temperatures close to the mean libron energy of o-H₂. Application of the theory for o-H₂ concentrations between 42% and 75% reveals a nearly concentration-independent mean libron energy equivalent to about 1 K. This qualitatively and quantitatively contradicts the conclusions of other theories, but agrees with recent experiments.

Original language	English (US)
Pages (from-to)	1246-1250
Number of pages	5
Journal	The Journal of Chemical Physics
Volume	69
Issue number	3
DOIs	https://doi.org/10.1063/1.436662
State	Published - 1978
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "NMR relaxation rate and the libron energy of solid hydrogen",

abstract = "Taking the rotational relaxation of orthohydrogen (o-H2) in solid hydrogen into account, we have theoretically investigated the longitudinal NMR spin lattice relaxation rate T1-1 of o-H2. The rate T1-1 is characterized by an anomalous maximum, as a function of temperature, at temperatures close to the mean libron energy of o-H2. Application of the theory for o-H2 concentrations between 42% and 75% reveals a nearly concentration-independent mean libron energy equivalent to about 1 K. This qualitatively and quantitatively contradicts the conclusions of other theories, but agrees with recent experiments.",

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year = "1978",

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AU - Woollam, John A.

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N2 - Taking the rotational relaxation of orthohydrogen (o-H2) in solid hydrogen into account, we have theoretically investigated the longitudinal NMR spin lattice relaxation rate T1-1 of o-H2. The rate T1-1 is characterized by an anomalous maximum, as a function of temperature, at temperatures close to the mean libron energy of o-H2. Application of the theory for o-H2 concentrations between 42% and 75% reveals a nearly concentration-independent mean libron energy equivalent to about 1 K. This qualitatively and quantitatively contradicts the conclusions of other theories, but agrees with recent experiments.

AB - Taking the rotational relaxation of orthohydrogen (o-H2) in solid hydrogen into account, we have theoretically investigated the longitudinal NMR spin lattice relaxation rate T1-1 of o-H2. The rate T1-1 is characterized by an anomalous maximum, as a function of temperature, at temperatures close to the mean libron energy of o-H2. Application of the theory for o-H2 concentrations between 42% and 75% reveals a nearly concentration-independent mean libron energy equivalent to about 1 K. This qualitatively and quantitatively contradicts the conclusions of other theories, but agrees with recent experiments.

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JF - The Journal of Chemical Physics

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NMR relaxation rate and the libron energy of solid hydrogen

Abstract

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