APPLICATION OF THE SUM PEAK METHOD TO DETERMINE ELECTRIC-FIELD GRADIENT IN DIFFERENT ENVIRONMENTS OF CS-133 NUCLEUS

The sum peak method based on the phenomenon of perturbed angular correlation has been applied to study the nuclear quadrupole interaction frequencies at133Cs which is followed by electron-capture decay of133Ba. These values are used to determine the z-component, which is the largest one of the electric field gradient. The electric field gradient /EFG/ is found to vary with different compounds of barium. The method is found to be useful in describing the chemical influences on the attenuation of angular correlations and hence in the study of EFG. © 1990 Akadémiai Kiadó.