Scaling of the giant dipole resonance widths in hot rotating nuclei from the ground state values

Abstract

The systematics of the giant dipole resonance (GDR) widths in hot and rotating nuclei are studied in terms of temperature T, angular momentum J and mass A. The different experimental data in the temperature range of 1 - 2 MeV have been compared with the thermal shape fluctuation model (TSFM) in the liquid drop formalism using a modified approach to estimate the average values of T, J and A in the decay of the compound nucleus. The values of the ground state GDR widths have been extracted from the TSFM parametrization in the liquid drop limit for the corrected T, J and A for a given system and compared with the corresponding available systematics of the experimentally measured ground state GDR widths for a range of nuclei from A = 45 to 194. Amazingly, the nature of the theoretically extracted ground state GDR widths matches remarkably well, though 1.5 times smaller, with the experimentally measured ground state GDR widths consistently over a wide range of nuclei.

arXiv comment15 pages, 4 figures, Accepted for publication in Physical Review C

References in corpus (4)

• Scaling Properties of the Giant Dipole Resonance Width in Hot Rotating nuclei
• Behavior of the giant-dipole resonance in ${}^{120}$Sn and ${}^{208}$Pb at high excitation energ
• Compilation of Giant Electric Dipole Resonances Built on Excited States
• Giant Dipole Resonance Width in near-Sn Nuclei at Low Temperature and High Angular Momentum

Cited by in corpus (4)

• Probing the critical behavior in the evolution of GDR width at very low temperatures in A~100 mass region
• Measurement of Giant Dipole Resonance width at low temperature: A new experimental perspective
• Experimental signature of collective enhancement in nuclear level density
• Giant Dipole Resonance studies in Ba isotopes at $\text{ E/A}\sim$ 5 MeV