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Hydrogen Motion In Lanthanum Hydrides By Means Of Quasielastic Neutron Scattering

Published online by Cambridge University Press:  10 February 2011

C. Karmonik ,
T. J. Udovic  and
J. J. Rush
C. Karmonik
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg MD 20899, USA
T. J. Udovic
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg MD 20899, USA
J. J. Rush
Affiliation:
NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg MD 20899, USA
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Abstract

The hydrogen dynamics in LaHx was studied for different concentrations x ≥ 2.5 at different temperatures by quasielastic neutron scattering. The neutron spectra show the existence of both long-range translational diffusion and localized motion. The prefactor of the jump rate for the first process exhibits a maximum around x= 2.75. The radius for the second motion is in agreement with neutron powder diffraction measurements which support a localized motion of H confined in an octahedral site.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 513: Symposium H – Hydrogen in Semiconductors and Metals , 1998 , 149
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

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