Experimental study of the isovector giant dipole resonance in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Zr</mml:mi><mml:mprescripts/><mml:none/><mml:mn>80</mml:mn></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Rb</mml:mi><mml:mprescripts/><mml:none/><mml:mn>81</mml:mn></mml:mmultiscripts></mml:math>

Ceruti, S.; Camera, F.; Bracco, A.; Mentana, A.; Avigo, R.; Blasi, N.; Bocchi, G.; Bottoni, S.; Brambilla, S.; Crespi, F. C. L.; Giaz, A.; Leoni, S.; Million, B.; Morales, A. I.; Nicolini, R.; Pellegri, L.; Riboldi, S.; Wieland, O.; Bazzacco, D.; Ciemała, M.; Farnea, E.; Gottardo, A.; Kmiecik, M.; Maj, A.; Mengoni, D.; Michelagnoli, C.; Modamio, V.; Montanari, D.; Napoli, D. R.; Recchia, F.; Şahin, E.; Ur, C. A.; Wasilewska, B.; Ziębliński, M.

doi:10.1103/physrevc.95.014312

Cited by 12 publications

(2 citation statements)

References 34 publications

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“…It is interesting to note that the critical temperature decreases with the increase of the nuclear mass and shows a linear behavior with 1/A which can be described through the relation T c = 0.7 + 37.5/A [72]. Recently, new data taken on 81 Rb at E * = 54 MeV were found in agreement with CTFM predictions [74].…”

Section: The Gdr Behaviour At T < 2 Mevmentioning

confidence: 57%

The hot GDR revisited

Santonocito

Blumenfeld

2020

Eur. Phys. J. A

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The properties of the Isovector Giant Dipole Resonance are reviewed as a function of the temperature of the state on which it is built. The experimental methods, based on scintillation detectors efficient for the detection of high energy gamma-rays, are described. Methods for determining the excitation energy and temperature from the measurement of light charged particle energy spectra taking pre-equilibrium emission into account are presented. The resonance properties, energy, width and strength, are followed as a function of increasing temperature. The data are analyzed in the framework of the statistical model, which is briefly presented, by using the codes CASCADE and DCASCADE. Various prescriptions for the characteristics of the resonance as well as theoretical models are incorporated into these statistical codes in view of a direct comparison with the data. The successes and deficiencies of the Thermal Shape Fluctuation model at low temperatures are discussed. A salient feature is the surprisingly abrupt disappearance of dipole strength above a limiting temperature which depends on the nuclear mass. Several models taking into account the competition between the time scales of collective degrees of freedom and nuclear lifetime only roughly reproduce the trend of the data. This disappearance of strength is tentatively linked to the nuclear liquid–gas phase transition.

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Section: The Gdr Behaviour At T < 2 Mevmentioning

confidence: 57%

The hot GDR revisited

Santonocito

Blumenfeld

2020

Eur. Phys. J. A

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“…By considering the sensitivity to the details of the nuclear shape, a new parameterization of the energy dependence of the electric dipole strength has been established for spherical, transitional, triaxial and well deformed nuclei [279]. The properties of the IVGDR have also been measured in the compound nuclei 80 Zr and 81 Rb, demonstrating the importance of these studies to obtain information on the basic quantities in nuclear structure such as the shape evolution and isospin symmetry [280].…”

Section: Isovector Giant Dipole Resonancementioning

confidence: 99%

Nuclear equation of state from ground and collective excited state properties of nuclei

Roca-Maza

Paar

2018

Progress in Particle and Nuclear Physics

190

110

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This contribution reviews the present status on the available constraints to the nuclear equation of state (EoS) around saturation density from nuclear structure calculations on ground and collective excited state properties of atomic nuclei. It concentrates on predictions based on self-consistent mean-field calculations, which can be considered as an approximate realization of an exact energy density functional (EDF). EDFs are derived from effective interactions commonly fitted to nuclear masses, charge radii and, in many cases, also to pseudo-data such as nuclear matter properties. Although in a model dependent way, EDFs constitute nowadays a unique tool to reliably and consistently access bulk ground state and collective excited state properties of atomic nuclei along the nuclear chart as well as the EoS. For comparison, some emphasis is also given to the results obtained with the so called ab initio approaches that aim at describing the nuclear EoS based on interactions fitted to few-body data only. Bridging the existent gap between these two frameworks will be essential since it may allow to improve our understanding on the diverse phenomenology observed in nuclei. Examples on observations from astrophysical objects and processes sensitive to the nuclear EoS are also briefly discussed. As the main conclusion, the isospin dependence of the nuclear EoS around saturation density and, to a lesser extent, the nuclear matter incompressibility remain to be accurately determined. Experimental and theoretical efforts in finding and measuring observables specially sensitive to the EoS properties are of paramount importance, not only for low-energy nuclear physics but also for nuclear astrophysics applications. 7 The expression introduced by Migdal in Ref. [43] neglected the term in a AS . 8 From a macroscopic picture it would correspond to an isotropic compression. 9 From a macroscopic picture it would correspond to a non-isotropic compression. 15

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