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arXiv 1107.0837nucl-th
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光学极限Glauber理论中质子-核总反应截面:对核物质状态方程的微妙依赖

Proton-nucleus total reaction cross sections in the optical limit Glauber theory: Subtle dependence on the equation of state of nuclear matter

K. Iida, K. Oyamatsu, B. Abu-Ibrahim, A. Kohama

摘要:

在Glauber理论的光学极限近似下,计算了不同入射质子能量下的质子-核反应截面。考虑了同位旋效应。在宏观核模型的框架下,得到了饱和密度附近均匀核物质状态方程的核子分布。我们发现,在40 MeV量级能量下,丰中子同位素的反应截面随表征对称能密度依赖性的参数L的增大而显著增大,而在300和800 MeV量级能量下,反应截面几乎与L无关。这是光学极限Glauber理论的一个特征,其中当总质子-中子截面足够小时,反应截面对中子皮厚度的指数依赖性仍然存在。

英文摘要:

We calculate the proton-nucleus total reaction cross sections at different energies of incident protons within the optical limit approximation of the Glauber theory. The isospin effect has been taken into account. The nucleon distribution is obtained in the framework of macroscopic nuclear models in a way depending on the equation of state of uniform nuclear matter near the saturation density. We find that at an energy of order 40 MeV, the reaction cross section calculated for neutron- rich isotopes significantly increases as the parameter L characterizing the density dependence of the symmetry energy increases, while at energies of order 300 and 800 MeV, it is almost independent of L. This is a feature of the optical limit Glauber theory in which an exponential dependence of the reaction cross section on the neutron skin thickness remains when the total proton-neutron cross section is small enough.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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