Abstract
Background: In our recent work [M. J. Ermamatov et al., Phys. Rev. C 94, 024610 (2016)], the two-neutron transfer induced by the reaction was studied for nucleus. Theoretical analysis of the low-lying states of indicates that the transfer to the ground state proceeds predominantly through simultaneous transfer of the two-neutron system.
Purpose: In this work, we extend our previous theoretical analysis towards high-lying states of the nucleus. In order to achieve a comprehensive picture, we revisit the experimental data for the reaction at 15 MeV bombarding energy. We also include new experimental cross sections for the high-lying states of the residual nucleus, populated in the reaction at 84 MeV.
Method: The same spectroscopic parameters of the target nucleus were used as input in the coupled channel calculations for the transfer induced by triton and projectiles. Simultaneous two-neutron transfer is calculated within the coupled reaction channel approach, using the extreme cluster and independent coordinate models. The sequential process is calculated within the distorted-wave Born approximation.
Results: Theoretical calculations reproduce the data well, leading to natural parity states in the nucleus without the need of adjustable parameters. The same methods are applied to the data and a good agreement is observed.
Conclusions: Detailed analyses show the importance of a simultaneous mechanism for the two-neutron transfer reactions. In transferring two neutrons, the pairing correlation plays an important role.
- Received 24 July 2017
DOI:https://doi.org/10.1103/PhysRevC.96.044603
©2017 American Physical Society