Issue |
Europhys. Lett.
Volume 65, Number 1, January 2004
|
|
---|---|---|
Page(s) | 130 - 136 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-10054-x | |
Published online | 01 December 2003 |
Muon spin relaxation as a probe of potential carbon-based hydrogen absorbers
Physics Group, School of Science, Griffith University - Brisbane 4111, Australia
Corresponding author: E.Gray@griffith.edu.au
Received:
7
August
2003
Accepted:
28
October
2003
Literature reports of hydrogen absorption by nanostructured
carbons range from nothing to tens of weight percent. We studied
pristine graphite and two potassium-graphite intercalation
compounds (GICs) using muon spin relaxation (μSR), because
the positive muon is expected to behave like a light hydrogen
isotope. The graphite did not trap muons, but at low temperatures
a component of the μSR spectrum from the two GICs could only
be modelled by the Kubo-Toyabe function. This result demonstrates
that muons were trapped by these samples and implies that
atoms would also be localised in these traps, in qualitative
agreement with accepted hydrogen absorption results. Thus μSR
is confirmed to be a valuable probe of the relative ability of
carbon-based samples to bind hydrogen atoms.
PACS: 76.75.+i – Muon spin rotation and relaxation / 81.05.Uw – Carbon, diamond, graphite / 82.75.-z – Molecular sieves, zeolites, clathrates, and other complex solids
© EDP Sciences, 2004
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