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Title: Triple-shape coexistence and superdeformation in Pb isotopes
Authors: Naz, Tabassum
Ahmad, Shakeb
Abusara, Hazem
Keywords: Lead - Isotopes
Lead - Isotopes - Decay
Nuclear shapes
Nuclear excitation
Issue Date: Oct-2018
Publisher: Jagiellonian University
Citation: DOI:10.5506/APhysPolB.49.1653
Abstract: Triple-shape coexistence and superdeformation in Pb isotopes with neu- tron numbers N = 96 –138 is studied. The constrained calculations are performed within the Relativistic Hartree–Bogoliubov (RHB) model using DD-ME2, DD-PC1, and NL3* force parameters, and pairing interaction separable in momentum space. Triple-shape coexistence (spherical, prolate and oblate) manifests themselves in a clear manner in 184 − 190 Pb nuclei with axial RHB calculations. Triaxial RHB calculations further confirm the find- ings. Superdeformed minimum is observed for 188 − 220 Pb isotopes, and the corresponding excitation energy, deformation and depth of well are compa- rable within different force parameters used. The behaviour with neutron number of the superdeformed excitation energy, two-neutron separation energy in the ground state and superdeformed minimum, and its differ- ential are fairly reproducing the trend of the available experimental data. The present numerical results are compared with Macro–microscopic Fi- nite Range Droplet Model (FRDM) and Hartree–Fock–Bogoliubov (HFB) model based on the interaction Gogny-D1S force. Overall, a fairly satis- factory agreement is found within the different force parameters and the calculated and experimental results
Description: An article published in Journal : Acta Physica Polonica Series B, vol. 49, no. 9, pp. 1653-1681, October 2018
Received the Journal in March 14, 2018; accepted May 6, 2018
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