Isospin Fractionation in Nuclear Multifragmentation

1999/10/31 by X. Xu, H. S. Xu, M. B. Tsang +27 · 12 citations
Engineering · Materials Science · Physics and Astronomy · #Nuclear Materials and Properties #Nuclear physics research studies #Nuclear reactor physics and engineering #nucl-ex

paper · pdf · doi:10.1103/physrevlett.85.716

published as Phys.Rev.Lett. 85 (2000) 716-719 · 14 paged, 3 figures

arxiv created 1999/11/01 · openalex publication_date 2000/07/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Isotopic distributions for light particles and intermediate mass fragments have been measured for ¹¹²Sn+¹¹²Sn, ¹¹²Sn+¹²⁴Sn, ¹²⁴Sn+¹¹²Sn, and ¹²⁴Sn+¹²⁴Sn collisions at E/A\phantom\rule0ex0ex=\phantom\rule0ex0ex50MeV. Isotope, isotone, and isobar yield ratios are utilized to estimate the isotopic composition of the gas phase at freeze-out. Analyses within the equilibrium limit imply that the gas phase is enriched in neutrons relative to the liquid phase represented by bound nuclei. These observations suggest that neutron diffusion is commensurate with or more rapid than fragment production.

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• Isotopic scaling of heavy projectile residues from the collisions of25MeV/nucleon 86Krwith124Sn,112Snand64Ni,58Ni
• Isoscaling in peripheral nuclear collisions around the Fermi energy and a signal of chemical separation from its excitation energy dependence
• Isospin asymmetry in nuclei and neutron stars
• Determination of the Stiffness of the Nuclear Symmetry Energy from Isospin Diffusion
• Properties of the initial participant matter interaction zone in near-Fermi-energy heavy-ion collisions
• Isobaric yield ratios in heavy-ion reactions, and symmetry energy of neutron-rich nuclei at intermediate energies
• Isospin dependence of mechanical and chemical instabilities in neutron-rich matter
• Effect of isospin-dependent cluster recognition on the observables in heavy ion collisions
• Isospin fluctuations in spinodal decomposition