Speaker
Description
We will present the progress of the data analysis for the PRISMA + AGATA experiment titled "Probing nucleon-nucleon correlations in the $^{48}$Ca + $^{208}$Pb system below the Coulomb barrier", conducted in March 2023 at LNL. The experiment aimed at probing nucleon-nucleon correlations by measuring the transfer probabilities for multi-neutron and multi-proton transfer channels in the $^{48}$Ca + $^{208}$Pb system at energies close to and below the Coulomb barrier.
Heavy ion reactions are considered a valuable tool for investigating such correlations, since they enable the transfer of multiple nucleon pairs, both neutrons and protons, between the interacting nuclei [1-6].
The experiment was carried out in inverse kinematics, using a $^{208}$Pb beam directed at a $^{48}$Ca target, employing the superconducting PIAVE-ALPI accelerator complex.
In this selected system, both neutron and proton stripping and pick-up processes are open, providing the opportunity to investigate nucleon-nucleon correlations simultaneously across a complete set of transfer channels.
Building on preliminary results presented at last year's ACC meeting, this work will show further progress toward a better understanding of the relative importance of single-nucleon transfer and more complex processes involving correlated nucleon pairs, as well as the role of correlations in the dynamics of the collision.
The PRISMA magnetic spectrometer [7] was used to identify the light reaction products with excellent charge and mass resolution, allowing for the clear separation of multiple transfer channels, despite some experimental challenges.
Up to five proton pick-up channels were observed, as well as proton stripping down to -2.
For all channels, AGATA [8] will provide crucial information about the populated excited states and will allow to extract both the intensities of these excited states and, using also the information measured with PRISMA, the intensities of the ground-state populations.
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World Scientific, 2013.
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[5] L. Corradi et al. In: Phys. Lett. B 834.137477 (2022).
[6] S. Szilner et al. In: Phys. Rev. Lett. 133.202501 (2024).
[7] A. M. Stefanini et al. In: Nucl. Phys. A 701.217c (2002).
[8] J.J. Valiente-Dob´on et al. In: Nuc. Instr. Meth. A 1049.168040 (20