Abstract
The nuclear orientation technique has been applied to dilute and nuclei in a hexagonal Re crystal, the activities being produced in situ via the nuclear compound reaction at MeV. From the -ray anisotropies at temperatures down to 8 mK the quadrupole interaction frequencies of Re and Re have been determined as -1149(100) MHz and -540(43) MHz, respectively. The electric field gradients (EFG's) are deduced to be V/ and V/. The negative sign in both cases indicates that the direction of the EFG at the impurity sites is uniquely fixed by the properties of the host lattice. The absolute magnitudes of these EFG's differ strongly from that of the pure system ReRe; they cannot be explained satisfactorily with any correlation known at present.
- Received 30 December 1982
DOI:https://doi.org/10.1103/PhysRevB.28.3130
©1983 American Physical Society