Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

B. Le Crom; M. Assié; Y. Blumenfeld; J. Guillot; H. Sagawa; T. Suzuki; M. Honma; N.L. Achouri; B. Bastin; R. Borcea; W.N. Catford; E. Clément; L. Cáceres; M. Caamaño; A. Corsi; G. De France; F. Delaunay; N. De Séréville; B. Fernandez-Dominguez; M. Fisichella; S. Franchoo; A. Georgiadou; J. Gibelin; A. Gillibert; F. Hammache; O. Kamalou; A. Knapton; V. Lapoux; S. Leblond; A.O. Macchiavelli; F.M. Marqués; A. Matta; L. Ménager; P. Morfouace; N.A. Orr; J. Pancin; X. Pereira-Lopez; L. Perrot; J. Piot; E. Pollacco; D. Ramos; T. Roger; F. Rotaru; A.M. Sánchez-Benítez; M. Sénoville; O. Sorlin; M. Stanoiu; I. Stefan; C. Stodel; D. Suzuki; J.-C. Thomas; M. Vandebrouck

doi:10.1016/j.physletb.2022.137057

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Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

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Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

B. Le Crom, M. Assié, Y. Blumenfeld, J. Guillot, H. Sagawa, T. Suzuki, M. Honma, N.L. Achouri, B. Bastin, R. Borcea, …

Physics letters. B, Vol.829(C), 137057

01/06/2022

DOI: https://doi.org/10.1016/j.physletb.2022.137057

Abstract

Cooper pairs

Direct reactions

Neutron-proton pairing

Radioactive beam

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.

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Title: Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer
Creators: B. Le Crom - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
M. Assié - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Y. Blumenfeld - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
J. Guillot - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
H. Sagawa - University of Aizu
T. Suzuki - Nihon University
M. Honma - University of Aizu
N.L. Achouri - Laboratoire de Physique Corpusculaire de Caen
B. Bastin - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
R. Borcea - Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
W.N. Catford - University of Surrey
E. Clément - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
L. Cáceres - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
M. Caamaño - Universidade de Santiago de Compostela
A. Corsi - IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
G. De France - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
F. Delaunay - Laboratoire de Physique Corpusculaire de Caen
N. De Séréville - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
B. Fernandez-Dominguez - Universidade de Santiago de Compostela
M. Fisichella - Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
S. Franchoo - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
A. Georgiadou - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
J. Gibelin - Laboratoire de Physique Corpusculaire de Caen
A. Gillibert - IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
F. Hammache - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
O. Kamalou - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
A. Knapton - Department of Physics, University of Surrey, Guildford GU2 5XH, United Kingdom
V. Lapoux - IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
S. Leblond - Laboratoire de Physique Corpusculaire de Caen
A.O. Macchiavelli - Lawrence Berkeley National Laboratory
F.M. Marqués - Laboratoire de Physique Corpusculaire de Caen
A. Matta - University of Surrey
L. Ménager - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
P. Morfouace - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
N.A. Orr - Laboratoire de Physique Corpusculaire de Caen
J. Pancin - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
X. Pereira-Lopez - Laboratoire de Physique Corpusculaire de Caen
L. Perrot - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
J. Piot - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
E. Pollacco - IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
D. Ramos - Universidade de Santiago de Compostela
T. Roger - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
F. Rotaru - Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
A.M. Sánchez-Benítez - University of Lisbon
M. Sénoville - IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
O. Sorlin - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
M. Stanoiu - Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
I. Stefan - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
C. Stodel - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
D. Suzuki - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
J.-C. Thomas - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
M. Vandebrouck - Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
Publication Details: Physics letters. B, Vol.829(C), 137057
Publisher: Elsevier B.V
Publication Date: 01/06/2022
Identifiers: 99822522002346; WOS:000821534900013
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

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