We have studied the effects of pion wave-function distortion on the cross-section of the absorption/emission mechanism of the pionic double charge exchange reaction on \nucl⁵⁶Fe, \nucl⁷⁶Ge and \nucl^128,130Te. We are using the pion-nucleus optical potential and the quasi\-particle p-n random phase approximation formalisms, considering only the contribution of pion absorption/emission (p-wave mechanism) on the correlated nucleon pair. We confirm the resonant behaviour of the forward cross-section at around 50 MeV, opposite to the plane wave-function results.

PACS numbers: 25.80.Gn, 24.10.Ht, 21.60.Jz