Muon diffusion and level crossing in copper |
| |
| Authors: | G M Luke J H Brewer S R Kreitzman D R Noakes M Celio R Kadono E J Ansaldo |
| |
| Institution: | (1) Dept. of Physics, Univ. of British Columbia, V6T 2A3 Vancouver, Canada;(2) TRIUMF, 4004 Wesbrook Mall, V6T 2A3 Vancouver, Canada;(3) University of Saskatchewan, S7N 0W0 Saskatchewan, Canada;(4) Present address: Dept. of Physics, Columbia University, Columbia, USA;(5) Present address: Dept. of Physics, University of Alberta, Alberta, Australia;(6) Present address: SEPA, CH-650 Bellizone, Switzerland;(7) Present address: Riken 2-1 Hirosawa, 351-01 Wako-shi, Saitima, Japan |
| |
| Abstract: | We have studied the quantum diffusion of positive muons in pure copper over the temperature range 12 mK≤T≤150 K using weak longitudinal field μSR. Below 150 K, this technique has proved to be the most sensitive to the muon hop
rate. Our final results for the behaviour of the muon hop rate are well explained within the framework of theories for the
quantum diffusion of light interstitials in metals of Kondo, Yamada and others. In addition, the use of level-crossing resonance
has allowed us to measure the electric quadrupole interaction strength (and sign) of the copper nuclei, ωQ= −3.314(7) μS−1. These results have enabled us to show that the muon occupies the same octahedral site at all the temperatures studied, ruling
out the possibility of metastable muon sites contributing to any significant portion of the muon polarization. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
