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<p>The two-neutron transfer <sup>28</sup>Si(<sup>18</sup>O,<sup>16</sup>O)<sup>30</sup>Si reaction is investigated at an incident energy of <i>E</i><sub><i>lab</i></sub>=84&#xa0;MeV based on three effective nucleon-nucleon (<i>NN</i>) interactions; JLM, SPP2, and density-independent M3Y Reid zero range. The cross-section of the exact finite-range coupled reaction channels (CRC) and coupled channel Born approximation (CCBA) are calculated for the direct and sequential two-neutron transfer. The differential cross-sections for the ground state transition, the first-excited state 2<sup>+</sup> (2.235&#xa0;MeV) and the sum of excited states 2<sup>+</sup>( 3.498&#xa0;MeV), 1<sup>+</sup>( 3.769&#xa0;MeV) and 0<sup>+</sup> (3.788&#xa0;MeV) in <sup>30</sup>Si residual nucleus are calculated. The obtained cross sections using the spectroscopic amplitudes for the projectile from PSDMOD and ZBM interactions are compared. This comparison revealed that the inclusion of the extended PSDMOD space has a significant effect in the ground state transition and the sum of excited states for the sequential calculations. Moreover, a comparison between coherent and incoherent sum of the direct and sequential calculations is presented. The use of different <i>NN</i> interactions introduces variations in the calculated cross sections; however, these variations do not affect the qualitative conclusions regarding the dominant two-neutron transfer mechanism.</p>

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Reaction Mechanism Effects in the 28Si(18O,16O)30Si Two-Neutron Transfer Reaction

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • A. Hemmdan,
  • Ghada G. El Deen M. Kandeel,
  • Zakaria M. M. Mahmoud,
  • M. A. Hassanain

摘要

The two-neutron transfer 28Si(18O,16O)30Si reaction is investigated at an incident energy of Elab=84 MeV based on three effective nucleon-nucleon (NN) interactions; JLM, SPP2, and density-independent M3Y Reid zero range. The cross-section of the exact finite-range coupled reaction channels (CRC) and coupled channel Born approximation (CCBA) are calculated for the direct and sequential two-neutron transfer. The differential cross-sections for the ground state transition, the first-excited state 2+ (2.235 MeV) and the sum of excited states 2+( 3.498 MeV), 1+( 3.769 MeV) and 0+ (3.788 MeV) in 30Si residual nucleus are calculated. The obtained cross sections using the spectroscopic amplitudes for the projectile from PSDMOD and ZBM interactions are compared. This comparison revealed that the inclusion of the extended PSDMOD space has a significant effect in the ground state transition and the sum of excited states for the sequential calculations. Moreover, a comparison between coherent and incoherent sum of the direct and sequential calculations is presented. The use of different NN interactions introduces variations in the calculated cross sections; however, these variations do not affect the qualitative conclusions regarding the dominant two-neutron transfer mechanism.