Is nuclear viscosity dependent on temperature?

E. Vardaci; A. Di Nitto; P.N. Nadtochy; G. La Rana; M. Cinausero; G. Prete; N. Gelli; E.M. Kozulin; G.N. Knyazheva; I.M. Itkis; M. Ashaduzzaman; F. Davide; A. Pulcini; D. Quero; P.K. Rath

doi:10.1051/epjconf/201819301002

All issues

Volume 193 (2018)

EPJ Web Conf., 193 (2018) 01002

Abstract

Open Access

Issue		EPJ Web Conf. Volume 193, 2018 6^th Workshop on Nuclear Fission and Spectroscopy of Neutron-Rich Nuclei (FISSION 2017)


Article Number		01002
Number of page(s)		5
Section		Theory and Models
DOI		https://doi.org/10.1051/epjconf/201819301002
Published online		14 November 2018

EPJ Web of Conferences 193, 01002 (2018)
https://doi.org/10.1051/epjconf/201819301002

Is nuclear viscosity dependent on temperature?

E. Vardaci¹^*, A. Di Nitto², P.N. Nadtochy³, G. La Rana¹, M. Cinausero⁴, G. Prete⁴, N. Gelli⁵, E.M. Kozulin⁶, G.N. Knyazheva⁶, I.M. Itkis⁶, M. Ashaduzzaman¹, F. Davide¹, A. Pulcini¹, D. Quero¹ and P.K. Rath¹^,7

¹ Istituto Nazionale di Fisica Nucleare and Diparimento di Fisica "E. Pancini", Universitá degli Studi di Napoli "Federico II", Napoli, 80126, Italy
² Johannes Gutenberg- Universität Mainz Institut für Kernchemie, Mainz, Germany
³ Omsk State Technical University, Mira prospekt 11, 44050 Omsk, Russia
⁴ Laboratori Nazionali di Legnaro dell’Istituto Nazionale di Fisica Nucleare, Legnaro (Padova), 35020, Italy
⁵ Istituto Nazionale di Fisica Nucleare, Sesto Fiorentino (Firenze), 50019, Italy
⁶ Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, RU-141980 Dubna, Moscow Region, Russia
⁷ Manipal Centre For Natural Sciences, Manipal University, 576104, India

^* e-mail: vardaci@na.infn.it

Published online: 14 November 2018

Abstract

Nuclear viscosity is an indispensable ingredient of the nuclear fission collective dynamical models. It governs the exchange of energy between the collective variables and the thermal bath. Its dependence on the shape and temperature is a matter of controversy. By using systems of intermediate fissility we have demonstrated in a recent study that the viscosity parameters is larger for compact shapes, and decreases for larger deformations of the fissioning system, at variance with the conclusions of the statistical model modified to include empirically viscosity and time scales. In this contribution we propose an experimental scenario to highlight the possible dependence of the viscosity from the temperature.

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