Study of Electric Quadrupole Perturbation at Multiple Probe Sites in Hf-doped Rutile in a Single Perturbed {γ}-{γ} Angular Correlation Measurement

Two different probes, viz., 111In/111Cd and 181Hf/181Ta, simultaneously have been incorporated in both pure rutile and Hafnium (Hf) -doped rutile Titanium Dioxide (TiO2) systems following a soft chemical method. The local information around two different probe sites in the same sample could be extracted in a single Time Differential Perturbed Angular Correlation (TDPAC) measurement using LIST mode data acquisition. The two probes were incorporated in the rutile samples by co-precipitation technique and then annealed at 1273K for 10h to get the rutile structure. The rutile structure was identified by the hyperfine parameters, viz., quadrupole frequency ({\omega}Q) and asymmetry (eta). At 111Cd site, {\omega}Q=16.8(1) Mrad/s and eta=0.19(1) while at 181Ta site, {\omega}Q=127.2(2) Mrad/s and eta=0.56(1). Due to the doping of Hf at 5 and 10 atom%, the sample partially lost the purity of the crystal and the fact has been reflected at both the probe sites.