Fernández-Rañada, Antonio2023-06-212023-06-211968-03-010369-354610.1007/BF02743787https://hdl.handle.net/20.500.14352/64924It is shown that theS-matrix of a highly absorptive resonant wave is dominated by a factor called outer factor. As an application an analytic expression for πN S-matrix in S_(31) wave is found.On the S-matrix of highly absorptive resonant waves: the πN S_(31) wavejournal articlehttp://dx.doi.org/10.1007/BF02743787http://link.springer.commetadata only access537ElectricidadElectrónica (Física)2202.03 Electricidad