79Br Nuclear Quadrupole Relaxation in the High Temperature Modification of Niobium Pentabromide
Abstract
The spin-lattice relaxation time of 79Br NQR has been measured between 4.2 K and room temperature. The result is compared with that of 35Cl NQR in NbCl5. The origin of the relaxation is attributed to the quadrupolar interaction and the temperature dependence is explained by the Raman process. The Debye temperature is determined to be 94 K and the relaxation time is related with the NQR frequency through the covalency.
- Publication:
-
Zeitschrift Naturforschung Teil A
- Pub Date:
- June 1992
- DOI:
- 10.1515/zna-1992-0601
- Bibcode:
- 1992ZNatA..47..713O
- Keywords:
-
- Niobium pentabromide;
- Nuclear quadrupole resonance;
- Spin-lattice relaxation;
- Raman process;
- Debye temperature.