Unitary version of the single-particle dispersive optical model and single-hole excitations in medium-heavy spherical nuclei

A unitary version of the single-particle dispersive optical model was proposed with the aim of applying it to describing high-energy single-hole excitations in medium-heavy mass nuclei. By considering the example of experimentally studied single-hole excitations in the ⁹⁰Zr and ²⁰⁸Pb parent nuclei, the contribution of the fragmentation effect to the real part of the optical-model potential was estimated quantitatively in the framework of this version. The results obtained in this way were used to predict the properties of such excitations in the ¹³²Sn parent nucleus.