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Two-body dissipation effect in nuclear fusion reactions

Wen, Kai, Barton, M. C., Rios, Arnau and Stevenson, P. D. (2018) Two-body dissipation effect in nuclear fusion reactions Physical Review C, 98 (1), 014603. 014603-1-014603-8.

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Friction coefficients for the fusion reaction 16O+16O → 32S are extracted based on both the time-dependent Hartree-Fock and the time-dependent density matrix methods. The latter goes beyond the mean-field approximation by taking into account the effect of two-body correlations, but in practical simulations of fusion reactions we find that the total energy is not conserved. We analyze this problem and propose a solution that allows for a clear quantification of dissipative effects in the dynamics. Compared to mean-field simulations, friction coefficients in the density-matrix approach are enhanced by about 20 %. An energy-dependence of the dissipative mechanism is also demonstrated, indicating that two-body collisions are more efficient at generating friction at low incident energies.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Barton, M.
Stevenson, P.
Date : 3 July 2018
Funders : Science and Technology Facilities Council (STFC)
DOI : 10.1103/PhysRevC.98.014603
Copyright Disclaimer : ©2018 American Physical Society
Uncontrolled Keywords : Nuclear fusion; Nuclear reactions; Nuclear Physics; PACS numbers: 21.60.Ev, 21.10.Re, 21.60.Jz, 27.50.+e
Depositing User : Clive Harris
Date Deposited : 05 Jul 2018 08:20
Last Modified : 11 Dec 2018 11:24

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