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<p>In this paper, we employ the Variable Phase Approach (VPA) to obtain the scattering phase shifts δ (<i>E</i>, <i>r</i>) , amplitude function <i>A</i> (<i>r</i>), and radial wavefunction <i>u</i>(<i>r</i>) for various channels involved in the astrophysical reaction <sup>7</sup>Be(<i>p</i> ,γ ) <sup>8</sup>B. Using the extracted phase shifts, we compute the total and partial cross sections. It is observed that the peaks in the partial cross section correspond to resonant states in the compound nucleus <sup>8</sup>B, which also manifest as enhancements in the astrophysical <i>S</i>-factor. These resonances significantly increase the reaction probability at certain energies, particularly in the lowenergy regime relevant to stellar nucleosynthesis. The VPA thus serves as a reliable and efficient method for calculating scattering phase shifts and, in turn, extracting the resonance energies of different partial waves. These resonance energies can provide valuable insight into the energy region where the astrophysical <i>S</i>-factor is likely to peak.</p>

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Computational Analysis of Resonant Structures in p7Be Scattering and Their Correlation with the Astrophysical S-Factor

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. Khachi,
  • V. Dwivedi,
  • S. Awasthi

摘要

In this paper, we employ the Variable Phase Approach (VPA) to obtain the scattering phase shifts δ (E, r) , amplitude function A (r), and radial wavefunction u(r) for various channels involved in the astrophysical reaction 7Be(p ,γ ) 8B. Using the extracted phase shifts, we compute the total and partial cross sections. It is observed that the peaks in the partial cross section correspond to resonant states in the compound nucleus 8B, which also manifest as enhancements in the astrophysical S-factor. These resonances significantly increase the reaction probability at certain energies, particularly in the lowenergy regime relevant to stellar nucleosynthesis. The VPA thus serves as a reliable and efficient method for calculating scattering phase shifts and, in turn, extracting the resonance energies of different partial waves. These resonance energies can provide valuable insight into the energy region where the astrophysical S-factor is likely to peak.