A. F. Pasquevich

Temperature dependence of the electric field gradient at Ta nuclei in hafnium pyrovanadate

The electric field gradient EFG in hafnium pyrovanadate has been measured at Hf sites at different temperatures with the time-differential perturbed angular correlation method. The results obtained show the existence of a phase transition around 110°C.

Application of the TDPAC technique to internal oxidation studies

Abstract Through the time differential perturbed angular correlation investigation of the system In in Ag, the applicability of the technique to the study of the internal oxidation process is proved. An unusually high electric quadrupole interaction for this system is found.

Mössbauer study of internally oxidized silver-tin alloys

AbstractA Mössbauer study of internally formed oxides as a function of oxidation temperatures between 200 ‡C and 850 ‡C was performed on previously annealed 1 at%AgSn alloys. The oxide formed at high temperatures (t ⩾ 500 ‡C) consists in agglomerates of tin dioxide

Impurity Centers in Oxides Investigated by γ-γ Perturbed Angular Correlation Spectroscopy and Ab Initio Calculations

\delta _{CaSnO_3 /RT}

IMPURITY CATIONIC-SITE POPULATION AND ELECTRIC-FIELD GRADIENT DEPENDENCE ON IONIC SIZE IN BIXBYITES SESQUIOXIDES IMPLANTED WITH 181HF 181TA

= 0.00 ± 0.01 mm/s, δQ=0.50 ± 0.03 mm/s). The low temperature oxide (t ⩽ 300 ‡C) is characterized by

TDPAC studies of after-effects in In2O3 precipitates in a silver matrix

\delta _{CaSnO_3 /RT}