Neutron-proton equilibration in 35 MeV/ collisions of Zn + Zn and Zn, Ni + Zn,
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2018 American Physical Society. Previous work has quantified the degree of neutron-proton equilibration in heavy-ion nuclear collisions by observing the convergence of isospin observables (such as the isoscaling parameter ) to an expected value based on similar symmetric reaction systems. We present a new signature of equilibration: the convergence of the isospin asymmetry (as quantified by three isoscaling metrics) of two mirror asymmetric reaction systems toward each other rather than a predefined point. For the reactions of 35 MeV/u Zn64,70+Zn64,70 and Zn64,Ni64+Zn64,Ni64 the neutron-proton equilibration was found to be approximately 80%, and this result is compared directly to previous work.
author list (cited authors)
May, L. W., Wakhle, A., McIntosh, A. B., Kohley, Z., Behling, S., Bonasera, A., ... Yennello, S. J.