Anomalous temperature dependence in the depolarization rate of positive muons in pure niobium
- 1 June 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 17 (11), 4143-4149
- https://doi.org/10.1103/physrevb.17.4143
Abstract
The temperature dependence of the depolarization rate for positive muons implanted into a pure niobium crystal has been measured in an external field of 102 Oe. Depolarization is observed at temperatures below 100 K, with a pronounced minimum occurring in the vicinity of 20 K. A study of the magnetic-field dependence at low temperature indicates that the muons occupy tetrahedral interstitial sites. The data are interpreted in terms of the self-trapping of the muon at low temperature, and trap-limited diffusion at temperatures above 65 K. Comparisons are made with the properties of hydrogen in niobium.Keywords
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