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首页> 外文期刊>Physics of atomic nuclei >Elastic (OO)-O-16-O-16 scattering at E(O-16)=350 MeV and new method for a model-independent determination of the scattering matrix
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Elastic (OO)-O-16-O-16 scattering at E(O-16)=350 MeV and new method for a model-independent determination of the scattering matrix

机译：E（O-16）= 350 MeV的弹性（OO）-O-16-O-16散射和独立于模型确定散射矩阵的新方法

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摘要

A new approach that can be used to extract the scattering matrix S(l) as a complex-valued function of the orbital angular momentum I directly from experimental data on elastic nucleus-nucleus scattering at intermediate energies without resort to additional model assumptions is developed on the basis of the evolutionary algorithm. Owing to the fact that the behavior of the derivatives of S(l) is automatically monitored within this approach, the scattering matrix obtained for (OO)-O-16-O-16 interaction at an energy of 350 MeV is determined by its absolute value and the nuclear phase shift, which are smooth monotonic functions of the orbital angular momentum. Moreover, the result involves no distortions, the form of the quantum deflection function being typical of the nuclear-rainbow pattern. It is shown that the ultimate form of S(l) is independent Of input representations of the scattering matrix, which were usually taken on the basis of various phenomenological models.
机译：在此基础上开发了一种新方法，该方法可用于直接从中能下弹性核-核散射的实验数据中提取散射矩阵S（l）作为轨道角动量I的复数值函数，而无需借助其他模型假设进化算法的基础。由于在这种方法中会自动监视S（l）的导数的行为，因此在能量为350 MeV时针对（OO）-O-16-O-16相互作用而获得的散射矩阵由其绝对值确定值和核相移，它们是轨道角动量的平滑单调函数。此外，结果不包含任何畸变，量子偏转函数的形式是核-彩虹图形的典型特征。结果表明，S（1）的最终形式与散射矩阵的输入表示无关，该输入表示通常是根据各种现象学模型得出的。

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