Shear-viscosity to entropy-density ratio from giant dipole resonances in hot nuclei

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.034309· OSTI ID:21596740

Dang, Nguyen Dinh ^[1]

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1. Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako City, 351-0198 Saitama (Japan) and Institute for Nuclear Science and Technique, Hanoi (Viet Nam)

The Green-Kubo relation and fluctuation-dissipation theorem are employed to calculate the shear viscosity {eta} of a finite hot nucleus directly from the width and energy of the giant dipole resonance (GDR) of this nucleus. The ratio {eta}/s of shear viscosity {eta} to entropy density s is extracted from the experimental systematics of the GDR in copper, tin, and lead isotopes at finite temperature T. These empirical results are then compared with the predictions by several independent models as well as with almost model-independent estimations. Based on these results, it is concluded that the ratio {eta}/s in medium and heavy nuclei decreases with increasing temperature T to reach (1.3--4)x({h_bar}/2{pi})/(4{pi}k{sub B}) at T=5 MeV.

• OSTI ID: 21596740
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 84; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COPPER ISOTOPES
DIPOLES
ENERGY RANGE
ENTROPY
FLUCTUATIONS
FORECASTING
GIANT RESONANCE
HEAVY NUCLEI
HOT NUCLEI
ISOTOPES
LEAD ISOTOPES
MEV RANGE
MEV RANGE 01-10
MULTIPOLES
NUCLEI
PHYSICAL PROPERTIES
RESONANCE
THERMODYNAMIC PROPERTIES
TIN ISOTOPES
VARIATIONS
VISCOSITY