2015/09/16 by Arvind Kumar, A. K. Rhine Kumar, Kumar, A. K. Rhine +2
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.1509.04986
17 pages, 7 figures, Accepted for publication in Physical Review C
arxiv created 2015/09/16 · openalex publication_date 2015/09/16 · arxiv updated 2015/09/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have studied the giant dipole resonance (GDR) in the hot and rotating nucleus 152Gd within the framework of thermal shape fluctuation model (TSFM) built on the microscopic-macroscopic calculations of the free energies with a macroscopic approach for the GDR. Our results for GDR cross sections are in good agreement with the experimental values except for a component peaking around 17 MeV where the data has large uncertainties. Such a component is beyond our description which properly takes care of the splitting of GDR components due to the deformation and Coriolis effects. Around this 17 MeV lies the half maximum in experimental cross sections, and hence the extracted GDR widths and deformations (estimated from these widths) turn out to be overestimated and less reliable. Reproducing these widths with empirical formulae could conceal the information contained in the cross sections. Fully microscopic GDR calculations and a more careful look at the data could be useful to understand the GDR component around 17 MeV. We also discuss the occurrence of γ-softness in the free energy surfaces of 152Gd and its role on GDR.