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Muon level crossing resonance in niobium |
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| Authors: | S.F.J. Cox R. Füchslin P.F. Meier T.L. Estle D.W. Cooke A. Morrobel‐Sosa R.L. Lichti B. Hitti S.P. Cottrell K.H. Chow C. Schwab |
| Affiliation: | (1) Rutherford Appleton Laboratory, ISIS Facility, Chilton, Didcot, Oxfordshire, OX11 OQX, UK;(2) Department of Physics, University College London, London, WC1T 6BT, UK;(3) Physics Institute, University of Zürich, Zürich, Switzerland;(4) Rice University, Houston, TX, USA;(5) Los Alamos National Laboratory, NM, USA;(6) Cal Poly, San Luis Obisco, CA, USA;(7) Texas Tech University, Lubbock, TX, USA;(8) TRIUMF, Vancouver, BC, Canada;(9) Clarendon Laboratory, Oxford, UK;(10) Centre National de la Recherche Scientifique, PHASE, F‐67037 Strasbourg, France |
| Abstract: | A useful guide to detecting quadrupole level crossing resonance (QLCR) spectra is to search in the vicinity of BEcdot(gamman/gamma_μ), where BE is the onset magnetic field for the decoupling of the quadrupole interaction, as seen in muon spin rotation linewidths. More detailed predictions of the positions and intensities of the resonances require numerical simulations taking account of the local geometry of the muon site. We present such simulations for muons adjacent to nuclei of spin 9/2 and demonstrate a pronounced dependence on the anisotropy of the quadrupole coupling tensor. Simulations for the specific cases of muons located at the octahedral and tetrahedral interstices in niobium metal are compared with the experimentally detected spectrum in a polycrystalline sample. This revised version was published online in August 2006 with corrections to the Cover Date. |
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