RT Journal Article
T1 Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer
A1 Le Crom, B.
A1 Sánchez Benítez, Ángel Miguel
A1 Vandebrouck, M.
AB The isovector and isoscalar components of neutron-proton pairing are investigated in the N=Z unstable nuclei of the fp-shell through the two-nucleon transfer reaction (p,3He) in inverse kinematics. The combination of particle and gamma-ray detection with radioactive beams of 56Ni and 52Fe, produced by fragmentation at the GANIL/LISE facility, made it possible to carry out this study for the first time in a closed and an open-shell nucleus in the fp-shell. The transfer cross-sections for ground-state to ground-state (J=0+, T=1) and to the first (J=1+, T=0) state were extracted for both cases together with the transfer cross-section ratios σ(0+, T=1)/σ(1+, T=0). They are compared with second-order distorted-wave born approximation (DWBA) calculations. The enhancement of the ground-state to ground-state pair transfer cross-section close to mid-shell, in 52Fe, points towards a superfluid phase in the isovector channel. For the “deuteron-like” transfer, very low cross-sections to the first (J=1+, T=0) state were observed both for 56Ni(p,3He) and 52Fe(p,3He) and are related to a strong hindrance of this channel due to spin-orbit effect. No evidence for an isoscalar deuteron-like condensate is observed.
PB Elsevier
SN 0370-2693
SN 1873-2445 (electrónico)
YR 2022
FD 2022
LK https://hdl.handle.net/10272/21979
UL https://hdl.handle.net/10272/21979
LA eng
NO Le Crom, B., Assié, M., Blumenfeld, Y., Guillot, J., Sagawa, H., Suzuki, T., Honma, M., Achouri, N. L., Bastin, B., Borcea, R., Catford, W. N., Clément, E., Cáceres, L., Caamaño, M., Corsi, A., De France, G., Delaunay, F., De Séréville, N., Fernandez-Dominguez, B., … Vandebrouck, M. (2022). Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer. In Physics Letters B (Vol. 829, p. 137057). Elsevier BV. https://doi.org/10.1016/j.physletb.2022.137057
NO The authors are very grateful to GANIL staff, particularly Vincent Morel for assistance with the set-up. The research leading to these results has received funding from the European Union under Seventh Framework Programme FP7 Infrastructures project ENSAR, grant agreement No. 262010. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC02-05CH11231 (LBNL). A.O. Macchiavelli thanks the Université Paris-Sud for support as an invited professor.
DS Repositorio Institucional de la Universidad de Huelva
RD 4 jun 2026