| Issue |
EPJ Web Conf.
Volume 311, 2024
The Fifth International Workshop on State of the Art in Nuclear Cluster Physics (SOTANCP5)
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|
|---|---|---|
| Article Number | 00003 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/epjconf/202431100003 | |
| Published online | 28 October 2024 | |
https://doi.org/10.1051/epjconf/202431100003
Neutron-proton pairing in the unstable N=Z nuclei of the f-shell through two-nucleon transfer reactions
Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
* Corresponding author: marlene.assie@ijclab.in2p3.fr
Published online: 28 October 2024
Pair transfer is a unique tool to study pairing correlations in nuclei. Neutron-proton pairing is investigated in the N=Z nuclei of the f-shell, through the reaction (p,3He) in inverse kinematics, that allows to populate at the same time the lowest J=0+, T=1 (isovector pairing) state and J=1+, T=0 (isoscalar pairing) state. Radioactive beams of 56Ni and 52Fe produced by fragmentation at the GANIL/LISE facility combined with particle and gamma-ray detection make it possible to carry out this study from 48Cr (mid-shell nucleus) to 56Ni (doubly-magic nucleus). The cross-sections were extracted and compared with second-order distorted-wave born approximation (DWBA) calculations performed with neutron-proton amplitudes obtained from shell model calculations with GXPF1 interaction. Very low cross-sections for the J=1+,T=0 state (isoscalar channel) were observed. The cross-section for 56Ni is one of order of magnitude lower than for 40Ca showing a strong reduction of the isoscalar channel in the f-shell as compared to the sd-shell. On the other hand, the increase of the cross-section towards the middle of the shell for the isovector channel points towards a possible superfluid phase.
© The Authors, published by EDP Sciences, 2024
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