Comparission of E1 Response of 154Sm and 155Sm in the Pygmy Dipole Resonance (PDR) Region

We investigate isovector pygmy dipole resonance (IVPDR) for the case of neutron-rich nuclei 68 Ni , 130 Sn and 134 Sn using effective nucleon–nucleon Skyrme interaction. We use the Hartree–Fock–Bogoliubov (HFB) theory and employ the (quasiparticle) random phase approximation (Q)RPA. We calculate and compare the PDR strength in the PDR energy region for the case of density dependent central and full interaction modes for RPA and QRPA calculations. We observe that the results for the pygmy dipole resonance for neutron-rich soft nuclei 68 Ni that we consider are in reasonable agreement with their experimental results in both interactions and calculations. We also study the PDR for highly neutron-rich heavy nuclei, such as 130 Sn and 134 Sn . We see that only the QRPA calculation with full interaction is in good agreement with the experimental results for these nuclei and with a recent study in the literature. We find that the PDR strength distribution sensitively depends on the chosen interaction modes, especially for the neutron-rich heavy nuclei 134 Sn .

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Pygmy Dipole Resonance: Status of the Theory and Unsolved issues

10.1063/1.3087104 ◽

2009 ◽

Author(s):

A. Avdeyenkov ◽

F. Gruemmer ◽

S. Kamerdzhiev ◽

S. Krewald ◽

N. Lyutorovich ◽

...

Keyword(s):

Dipole Resonance ◽

Pygmy Dipole Resonance

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Investigation of pygmy dipole resonance in 154Sm

10.1063/1.4976416 ◽

2017 ◽

Cited By ~ 1

Author(s):

Huseynqulu Quliyev ◽

Zemine Zenginerler ◽

Ekber Guliyev ◽

Ali Akbar Kuliev

Keyword(s):

Dipole Resonance ◽

Pygmy Dipole Resonance

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The electric dipole response of even-even 154-164Dy isotopes

Physica Scripta ◽

10.1088/1402-4896/ac4863 ◽

2022 ◽

Author(s):

Huseynqulu Quliyev ◽

Nilufer Demirci Saygı ◽

Ekber Guliyev ◽

Ali Akbar Kuliev

Keyword(s):

Cross Sections ◽

Random Phase Approximation ◽

Random Phase ◽

Electric Response ◽

Quasiparticle Random Phase Approximation ◽

Effective Interactions ◽

Dipole Resonance ◽

Pygmy Dipole Resonance ◽

Strength Functions ◽

Dipole Response

Abstract The excitation of pygmy dipole resonance (PDR) and giant dipole resonance (GDR) in even-even 154-164Dy isotopes is examined through quasiparticle random-phase approximation (QRPA) with the effective interactions that restores the broken translational and Galilean invariances. In each isotope, an electric response emerges by showing ample distribution at energies below and above 10 MeV. We, therefore, study the transition cross sections and probabilities, photon strength functions, transition strengths, isospin character, and collectivity of the predicted E1 responses.

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