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Role of the Surface Energy in Heavy-Ion Collisions

Stevenson, P. D. (2020) Role of the Surface Energy in Heavy-Ion Collisions In: Heavy Ion Accelerator Symposium (HIAS 2019), 09-13 Sep 2019, Canberra, Australia.

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The surface energy is one of the fundamental properties of nuclei, appearing in the simplest form of the semi-empirical mass formula. The surface energy has an influence on e.g. the shape of a nucleus and its ability to deform. This in turn could be expected to have an effect in fusion reactions around the Coulomb barrier where dynamical effects such as the formation of a neck is part of the fusion process. Frozen Hartree-Fock and Time-Dependent Hartree-Fock calculations are performed for a series of effective interactions in which the surface energy is systematically varied, using 40Ca + 48Ca as a test case. The dynamical lowering of the barrier is greatest for the largest surface energy, contrary to naive expectations, and we speculate that this may be due to the variation in other nuclear matter properties for these effective interactions.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Stevenson, P.
Date : 6 April 2020
DOI : 10.1051/epjconf/202023203005
Copyright Disclaimer : © The Authors, published by EDP Sciences, 2020
Depositing User : Clive Harris
Date Deposited : 18 May 2020 15:01
Last Modified : 18 May 2020 15:01

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