RUI: Probing the Equation of State of Dense Neutron-Rich Matter with High Energy Radioactive Beams at Rare Isotope Accelerator (RIA)

这项提议是为了研究与计划中的稀有同位素加速器(RIA)上的高能放射性束预期发生的反应有关的致密富中子物质的状态方程(EOS)的几个关键问题。最终目的是准确地确定核状态方程的同位旋依赖关系。后者是最新的美国核物理长期计划中确定的最重要的主题之一。它也是一个基本性质，支配着中子星的许多方面和超新星的爆炸机制。在拟议的工作中要解决的重要理论问题包括：对称势的动量依赖性及其对RIA富中子核引起的核反应的影响；致密富中子物质中中子和质子的有效质量及其散射截面；致密富中子物质的不可压缩性；富中子物质的同位旋分离和化学不稳定性；电荷对称破缺(CSB)和Rho-omega介子在致密富中子物质中的混合。此外，还建议用玻色-爱因斯坦统计发展相对论重离子碰撞的输运理论。几名本科生将直接全面参与这项拟议的研究。他们对研究的参与为他们在本科毕业后的职业选择提供了广泛而坚实的基础。因此，这项提议的资金将使国际和平研究所能够更好地为研究非密集机构的学生培养成为下一代科学家和工程师的能力。这项提案的资金还将进一步改善环境和基础设施，特别是阿肯色州立大学和整个阿肯色州的核物理研究。

This proposal is to investigate several critical issues concerning the equation of state (EOS) of dense neutron-rich matter relevant to the reactions expected with the high energy radioactive beams at the planned Rare Isotope Accelerator (RIA). The ultimate goal is to determine accurately the isospin dependence of the nuclear EOS. The latter is among the most important topics identified in the latest long-range plan for U.S. nuclear physics. It is also a foundamental property that governs many aspects of neutron stars and the explosion mechanisms of supernove. Among the important theoretical issues to be addressed in the proposed work are: Momentum-dependence of the symmetry potential and its effects on nuclear reactions induced by neutron-rich nuclei at RIA; Effective masses of neutrons and protons and their scattering cross sections in dense neutron-rich matter; Incompressibility of dense neutron-rich matter; Isospin-separation and chemical instabilities of neutron-rich matter; Charge-symmetry-breaking (CSB) and rho-omega meson mixing in dense neutron- rich matter. In addition, it is also proposed to develop a transport theory with Bose-Einstein statistics for relativistic heavy-ion collisions. Several undergraduate students will fully participate directly in the proposed research. Their involvement in research provides a broad and solid basis for their choice of where to take their career beyond the undergraduate degree. The funding of this proposal will thus allow the PI to better prepare students in a research non-intensive institution to become next generation scientists and engineers. Funding of this proposal will also further improve the environment and infrastructure for research in nuclear physics at Arkansas State University in particular and the State of Arkansas in general.