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首页> 外文期刊>Physical review, C >Direct and indirect alpha transfer in elastic O-16 + C-12 scattering
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Direct and indirect alpha transfer in elastic O-16 + C-12 scattering

机译：弹性O-16 + C-12散射中的直接和间接α转移

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摘要

The extensive elastic O-16 + C-12 scattering data measured at low energies show consistently an oscillating enhancement of the elastic cross section at backward angles that is difficult to describe within the conventional optical model. Given the significant alpha spectroscopic factors predicted for the dissociation O-16 - alpha + C-12 by the shell model (SM) and alpha-cluster model calculations, the contribution of the alpha transfer channels to the elastic O-16 + C-12 scattering should not be negligible, and is expected to account for the enhanced oscillation of the elastic cross section at backward angles. To reveal the impact of the alpha transfer, a systematic coupled reaction channels (CRCs) analysis of the elastic O-16 + C-12 scattering has been performed where the multistep couplings between the elastic and inelastic scattering channels and the direct and indirect alpha transfer channels were treated explicitly, using the real optical potentials and inelastic scattering form factors determined by the double-folding model. We show that a consistent CRC description of the elastic O-16 + C-12 data at different energies can be obtained over the whole angular region, using the a spectroscopic factors determined recently in the large scale SM calculation. The present CRC results are, therefore, of interest not only for the nuclear scattering studies but also provide an important spectroscopic information on the cluster dissociation of O-16.
机译：在低能量下测量的广泛弹性O-16 + C-12散射数据始终如一地展示了在难以描述在传统光学模型内的后角处的弹性横截面的振荡增强。鉴于对解离O-16预测的显着α光谱因子 - ＆通过Shell模型（SM）和Alpha-Cluster模型计算的Alpha + C-12，将alpha转移通道对弹性O-16 + C-12散射的贡献不可忽略不计，并且预计将占增强的弹性横截面处于向后角度的振动。为了揭示α转移的影响，已经进行了弹性O-16 + C-12散射的系统耦合反应通道（CRCS）分析，其中弹性和非弹性散射通道之间的多步和直接和间接α转移使用双折叠模型确定的真实光学电位和非弹性散射形式因子明确处理通道。我们表明，在整个角度区域中，可以在整个角度区域上获得在不同能量的弹性O-16 + C-12数据的一致CRC描述，使用最近在大规模SM计算中确定的光谱因子。因此，目前的CRC结果不仅适用于核散射研究，而且还提供了关于O-16的簇解离的重要光谱信息。

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