Reduced quasifission competition in fusion reactions forming neutron-rich heavy elements

Abstract

Measurements of mass-angle distributions (MADs) for Cr + W reactions, providing a wide range in the neutron-to-proton ratio of the compound system, (N/Z)CN, have allowed for the dependence of quasifission on the (N/Z)CN to be determined in a model-independent way. Previous experimental and theoretical studies had produced conflicting conclusions. The experimental MADs reveal an increase in contact time and mass evolution of the quasifission fragments with increasing (N/Z)CN, which is indicative of an increase in the fusion probability. The experimental results are in agreement with microscopic time-dependent Hartree-Fock calculations of the quasifission process. The experimental and theoretical results favor the use of the most neutron-rich projectiles and targets for the production of heavy and superheavy nuclei.

arXiv commentAccepted to PRC as a Rapid Communication

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• Timescales of quantum equilibration, dissipation and fluctuation in nuclear collisions
• Quantal Diffusion Description of Multi-Nucleon Transfers in Heavy-Ion Collisions
• Enhanced nucleon transfer in tip collisions of ${}^{238}$U+${}^{124}$Sn
• Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in ${}^{58}$Ni+${}^{60}$Ni Reactions
• Transport properties of isospin asymmetric nuclear matter using TDHF
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• Quasifission dynamics in microscopic theories
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• Impact of tensor force on quantum shell effects in quasifission reactions
• Quantal diffusion description of isotope production by multinucleon transfer mechanism in ${}^{48}\text{Ca}+{}^{238}\text{U}$ collisions
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• Nuclear Quantum Many-Body Dynamics: From Collective Vibrations to Heavy-Ion Collisions (2nd edition)
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