TDPAC study of complex structure semiconductor compounds; The case niobium pentoxide
- Dept. de Fisica, Facultad de Ciencias Exactas, Univ. Nacional de La Plata, C.C. No. 67, 1900 La Plata (AR)
In this paper, a new method for analyzing Time-Differential Perturbed Angular Correlation spectra is presented and applied to study the hyperfine interaction of {sup 100}Rh in the high temperature modification of niobium pentoxide. The measured quadrupole interactions are assigned to about 80% of the radioactive probes replacing niobium atoms in the lattice and about 20% located in perturbed sites. The origin of this perturbation, producing a high frequency component in the measured spectra is discussed and temptatively assigned to remaining radiation damage in the compound. The hyperfine interaction of {sup 111}Cd probes, introduced through thermal diffusion into niobium pentoxide, is also presented. The temperature dependence of the hyperfine parameters in this case is studied in the temperature range RT-800{degrees}C. The spectral analyzing method employed allows a direct comparison of experimental data with point charge model calculations and a simultaneous evaluation of the anti-shielding factor {beta}. The obtained values (27 for {sup 100}Rh and 15 for {sup 111}Cd) are discussed in terms of the compound and probe's characteristics.
- OSTI ID:
- 7203805
- Journal Information:
- International Journal of Modern Physics B; (United States), Vol. 6:13; ISSN 0217-9792
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
74 ATOMIC AND MOLECULAR PHYSICS
HYPERFINE STRUCTURE
PERTURBED ANGULAR CORRELATION
NIOBIUM OXIDES
CRYSTAL STRUCTURE
RHODIUM 100
CADMIUM 111
CALCULATION METHODS
CORRELATIONS
MATRIX ISOLATION
MODIFICATIONS
POINT CHARGE
TEMPERATURE RANGE 1000-4000 K
THERMAL DIFFUSION
ANGULAR CORRELATION
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CADMIUM ISOTOPES
CHALCOGENIDES
DIFFUSION
ELECTRIC CHARGES
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTO
MINUTES LIVING RADIOISOTOPES
NIOBIUM COMPOUNDS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
REFRACTORY METAL COMPOUNDS
STABLE ISOTOPES
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
665100 - Nuclear Techniques in Condensed Matter Physics - (1992-)
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)