Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in Ni+Ni Reactions
arXiv:1712.09191 · doi:10.1103/PhysRevLett.120.022501
Abstract
Energy dissipative processes play a key role in how quantum many-body systems dynamically evolve towards equilibrium. In closed quantum systems, such processes are attributed to the transfer of energy from collective motion to single-particle degrees of freedom; however, the quantum many-body dynamics of this evolutionary process are poorly understood. To explore energy dissipative phenomena and equilibration dynamics in one such system, an experimental investigation of deep-inelastic and fusion-fission outcomes in the Ni+Ni reaction has been carried out. Experimental outcomes have been compared to theoretical predictions using Time Dependent Hartree Fock and Time Dependent Random Phase Approximation approaches, which respectively incorporate one-body energy dissipation and fluctuations. Excellent quantitative agreement has been found between experiment and calculations, indicating that microscopic models incorporating one-body dissipation and fluctuations provide a potential tool for exploring dissipation in low-energy heavy ion collisions.
11 pages, 9 figures, 1 table, including Supplemental Material - Version accepted for publication in Physical Review Letters
References in corpus (6)
- Interplay between quantum shells and orientation in quasi-fission
- A Stochastic Mean-Field Approach For Nuclear Dynamics
- Particle number fluctuations and correlations in transfer reactions obtained using the Balian-Vénéroni variational principle
- Dissipative dynamics in quasi-fission
- Reduced quasifission competition in fusion reactions forming neutron-rich heavy elements
- Transport properties of isospin asymmetric nuclear matter using TDHF