Identification of cross-relaxation resonances of12B implanted in sc aluminum |
| |
Authors: | G S'heeren M Van Den Bergh R Coussement M Cyamukungu J Lehmann R Pirlot L Grenacs P Boolchand |
| |
Institution: | (1) Instituut voor Kern- en Stralingsfysika, KU Leuven, Celestijnenlaan 200D, B-3001 Heverlee, Belgium;(2) Université Catholique de Louvain, Louvain-la-Neuve, Belgium;(3) University of Cincinnati, 45221-0030, OH, USA |
| |
Abstract: | Polarized12B nuclei were produced andrecoil implanted in single crystals of fcc aluminum. The boron decay asymmetry andrelaxation times were measured as a function of external magnetic field values andat different orientation angles of the crystal. To identify the resonances at certain field values in the12B depolarization in Al, a consistent theory based on the principle of a multi-spin system and Nuclear level-crossing has been developed. A unique identification of the resonances, based on the resonant interaction between boron andparticular pairs of aluminum neighbours, is perfectly possible. The strong dissipative coupling of the Al nuclei with the electron bath of the lattice hinders a straightforward interpretation of the resonance width anddepth. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|