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Electromagnetic dipole transitions below 4 MeV in odd-neutron 161,163Dy

2021; Elsevier BV; Volume: 1014; Linguagem: Inglês

10.1016/j.nuclphysa.2021.122252

1873-1554

E. Tabar, H. Yakut, G. Hoşgör, E. Kemah,

Advanced NMR Techniques and Applications

Low-lying dipole excitations in 161,163Dy isotopes have been investigated within the Quasiparticle Phonon Nuclear Model (QPNM), including effective restoration forces for broken Rotational, Translational, and Galilean symmetries due to the mean-field approach. The fine structure of the experimental spectra has been agreeably produced by theory. Besides, a good agreement with the existing experimental data for the gross properties of the low-lying dipole strength has been obtained. It has been demonstrated that although most of the dipole strength in the low-lying part of the dipole spectrum is due to the magnetic dipole (M1) transitions, the contribution of the electric dipole (E1) strength to the fragmentation as well as the summed radiation widths cannot be ruled out in 161,163Dy.