Isobaric yield ratios in heavy-ion reactions, and symmetry energy of neutron-rich nuclei at intermediate energies

2011/06/30 by Chun-Wang Ma, Fang Wang, Y. G. +2
Engineering · Physics and Astronomy · #Astronomical and nuclear sciences #Nuclear physics research studies #Nuclear reactor physics and engineering #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.83.064620

published as Phys.Rev.C83:064620,2011 · 12 pages, 6 figures

openalex publication_date 2011/06/30 · arxiv created 2011/07/01 · arxiv updated 2011/08/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The isobaric yield ratios of the fragments produced in the neutron-rich ⁴⁸Ca and ⁶⁴Ni projectile fragmentation are analyzed in the framework of a modified Fisher model. The correlations between the isobaric yield ratios (R) and the energy coefficients in the Weisz"acker-Beth semiclassical mass formula (the symmetry-energy term a_sym, the Coulomb-energy term a_c, and the pairing-energy term a_p) and the difference between the chemical potentials of the neutron and proton (\ensuremathμ_n\ensuremath-\ensuremathμ_p) are investigated. Simple correlations between (\ensuremathμ_n\ensuremath-\ensuremathμ_p)/T, a_c/T, a_sym/T, and a_p/T (where T is the temperature), and lnR are obtained. It is suggested that (\ensuremathμ_n\ensuremath-\ensuremathμ_p)/T, a_c/T, a_sym/T, and a_p/T of neutron-rich nuclei can be extracted using isobaric yield ratios for heavy-ion collisions at intermediate energies.

Citations

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