No signature of the saturation of giant dipole resonance width in medium-mass nuclei
- 13 September 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 104 (3), L031304
- https://doi.org/10.1103/physrevc.104.l031304
Abstract
An experimental study on the temperature () dependence of giant dipole resonance (GDR) width was performed for the medium mass nucleus in the range of MeV at an average angular momentum of using the fusion reaction. The emitted high-energy rays and evaporated neutrons were measured in coincidence with low-energy discrete -ray multiplicities. The GDR parameters, nuclear level density parameter, and nuclear temperature were determined by the statistical model analysis of the high-energy -ray spectra as well as evaporated neutron spectra. The measured GDR width is found to increase monotonically with temperature, in contradiction with the recent observation of the width saturation in . Comparisons of the measured data with predictions of the adiabatic thermal shape fluctuation model and its refined version, the critical temperature included fluctuation model, are presented and discussed.
Funding Information
- Science and Engineering Research Board (CRG-2018-000336)
This publication has 39 references indexed in Scilit:
- Giant Dipole Resonance in the Hot and ThermalizedNucleus: Damping of Collective Modes at Finite TemperaturePhysical Review Letters, 2006
- Giant Dipole Resonance in Highly Excited Nuclei: Does the Width Saturate?Physical Review Letters, 1999
- Scaling Properties of the Giant Dipole Resonance Width in Hot Rotating NucleiPhysical Review Letters, 1998
- Quantal and Thermal Dampings of Giant Dipole Resonances in,, andPhysical Review Letters, 1998
- Nuclear Structure at High Excitation Energy Studied with Giant ResonancesAnnual Review of Nuclear and Particle Science, 1992
- Excitation-energy dependence of the giant dipole resonance widthPhysical Review Letters, 1992
- Saturation of the width of the giant dipole resonance at high temperaturePhysical Review Letters, 1989
- Statistical giant dipole resonance decay of highly excited states ofPhysical Review C, 1987
- Giant dipole resonance in the statistical decay of,, andcompound nucleiPhysical Review C, 1983
- Statistics and Nuclear ReactionsPhysical Review B, 1937