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首页> 外文期刊>Physical review, C >Effects of in-medium NN cross section and density distribution on the reaction cross sections of Ne, Mg, and O isotopes with C-12 at 1 GeV
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Effects of in-medium NN cross section and density distribution on the reaction cross sections of Ne, Mg, and O isotopes with C-12 at 1 GeV

机译：介质NN横截面和密度分布对Ne，Mg和O同位素的介入横截面和密度分布在1 GEV下C-12的反应横截面

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摘要

The nucleus-nucleus reaction cross sections of Ne18-34, Mg20-36,O 16-24 + C-12 at one GeV/u are calculated in the Glauber theory using different models of the nucleon-nucleon (NN) cross sections and nuclear densities. For in-medium effects, we consider the phenomenological (Ph), geometrical Pauli (GP), and modified combined (MC) models for the NN reaction cross section. For the density distributions, we used the Sao Paulo (SP), Skyrme-Hartree-Fock (SHF), and the angle-averaged deformed Fermi (DF) densities. The results are compared with experiments as well as other theoretical calculations. It is found that the data can, generally, be described by using the Ph and GP models for in-medium effects with the SP density, which, on the other hand, predicted smaller radii. A satisfactory explanation of the experimental data is obtained by using more realistic densities such as SHF and DF with realistic radii, and the MC model for medium modifications, which involve the combined effect of the phase variation, higher momentum transfer components, and Pauli blocking of the NN amplitude. The in-medium Ph and GP models when used with realistic densities, cannot describe the data at 1 GeV.
机译：Ne18-34，Mg20-36，O 16-24 + C-12的核 - 核反应横截面在一个GEV / U处的Glauber理论中使用核子核（NN）横截面和核的不同模型计算密度。对于中等效果，我们考虑了NN反应横截面的现象学（pH），几何pauli（GP）和改性组合（MC）模型。对于密度分布，我们使用了Sao Paulo（SP），Skyrme-Hartree-Fock（SHF），以及角度平均变形的费米（DF）密度。结果与实验以及其他理论计算进行比较。结果发现，通常，可以通过使用PH和GP模型来描述与SP密度的中型效果的pH和GP模型，这在另一方面预测了较小的半径。通过使用更现实的密度（如SHF和DF具有现实的半径）和用于介质修改的MC模型来获得对实验数据的令人满意的解释，这涉及相变，较高动量转移组件和保利阻塞的组合效果nn幅度。与现实密度一起使用时，中介的pH和GP模型无法描述1 GEV的数据。

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