About the perturbation factor for static and distributed quadrupole interaction in PAC spectroscopy

Abstract

The traditional analysis of electric quadrupole interaction in disordered materials can give hyperfine parameters that would mask the actual values. As the relative distribution width δ increases, the correlation of this parameter with the rest produces strong shifts in all of them. Motivated by the values δ ⩾ 0.4 fitted in BaTi_1-xHf_xO₃ for 0 ⩽ x ⩽ 0.2 and other perovskites we extend previous calculations for Gaussian distribution function to the interval 0.3 ⩽ δ ⩽ 1. We also include the study of correlation between quadrupole parameters for Lorentzian distribution function in the 0 ⩽ δ ⩽ 1 interval.