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  • 1 Punjabi University Department of Physics 147 002 Patiala India
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Nuclear quadrupole interaction frequencies at133Cs following the electron-capture decay of133Ba for BaSO4, Ba/BrO3/2 and Ba/NO3/2 were obtained by measuring the perturbation of 356–81 keV cascade of133Ba. Nuclear quadrupole interaction frequencies for BaSO4 and Ba/BrO3/2 are 17.2 Mrad sec–1 and 14.6 Mrad sec–1, respectively, while no perturbation of 356–81 keV cascade was observed in case of Ba/NO3/2. Further the possibility of any after-effects of electron-capture decay is ruled out through the measurement of 276–161 keV gamma-gamma directional correlation.