ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We present the first results of a study of the effects of varying impurity concentration on the temperature dependence of the depolarization rate of positive muons implanted into vanadium. Data are reported for the most highly purified polycrystalline sample yet measured, and the same sample subsequently doped with about 500 ppm oxygen by weight. The data for the pure sample shows a low depolarization rate (〈.15 μsec−1) at all temperatures measured, showing a broad minimum centered at ∼35 K, followed by a sharp peak near 90 K and a rapid drop to negligible values at 200 K. The data is contrasted with previously published data [2] on less pure samples, and calls into question previous interpretations of the behavior of the μ+ at low temperatures in impure vanadium [1] as one-phonon-assisted tunneling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01028799
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