Two-body dissipation effect in nuclear fusion reactions

Abstract

Friction coefficients for the fusion reaction ${}^{16}$O+${}^{16}$O $\to$ ${}^{32}$S 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.

arXiv comment9 pages, 6 figures

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Cited by in corpus (12)

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• Future of Nuclear Fission Theory
• TDHF Theory and Its Extensions for the Multinucleon Transfer Reaction: a Mini Review
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• Energy and pairing dependence of dissipation in real-time fission dynamics
• Multi-nucleon transfer in ${}^{58}\text{Ni}+{}^{60}\text{Ni}$ and ${}^{60}\text{Ni}+{}^{60}\text{Ni}$ in stochastic mean-field approach
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• Microscopic Study of Spin Transfer in Near-Barrier Nuclear Reactions
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