Cross relaxation of12B in single-crystal aluminium

ISSN:
1434-6036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The dipole-dipole interaction of extremely diluted probe nuclei with their surrounding host nuclei gives rise to mutual flip-flop processes of the nuclear spins. As energy has to be conserved in this so-called cross-relaxation (CR) process a transfer of polarization from the probes to the host nuclei occurs only at certain values of the inductionB leading to resonance-like dips in the probe's polarization. For the system12B in single-crystal aluminium CR spectra were measured forB=7...400 mT andT=310...410 K at various crystal orientations relative toB. All the spectra could be well explained by a theoretical calculation assuming the octahedral interstitial site for12B.
Type of Medium:
Electronic Resource
URL: