The giant dipole resonance (GDR) in odd-mass ¹⁸¹–¹⁹⁵Pt nuclei

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This manuscript theoretically examines the Giant Dipole Resonance (GDR) in odd-mass 181–195 Pt nuclei with the Translational and Galileo Invariant Qusiparticle Phonon Nuclear Model (TGI-QPNM) for the first time. TGI-QPNM includes axially symmetric Woods-Saxon potential, isovector dipole–dipole interaction and restoration forces for spontaneously broken Galilean and Translation symmetries of the nuclear Hamiltonian. Therefore, TGI-QPNM makes eliminating the spurious contributions in the E 1 spectrum possible. The obtained results show that the odd-mass 181–195 Pt isotopes have a two-peak structure. In 181–187 Pt isotopes, while the second peak is higher than the first, in 189–195 Pt isotopes, it’s the opposite. The photo-absorption result for the 195 Pt is in reasonably good agreement with the experimental data.