Comments on time-differential perturbed angular correlation functions for static axial electric quadrupole interaction

A technique of computer aided derivation of analytical formulas has been applied to perturbed- angular correlation functions in case of the static axial electric quadrupole interaction in a single crystal. An arbitrary orientation of the EFG symmetry axis with respect to the detectors was considered. Explicit formulas for correlation functions in commonly used detector configurations= and=/2 have been obtained. Small corrections to the previously published formulas have been suggested.