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

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.; Fisichella, M.; Franchoo, S.; Georgiadou, A.; Gibelin, J.; Gillibert, A.; Hammache, F.; Kamalou, O.; Knapton, A.; Lapoux, V.; Leblond, S.; Macchiavelli, A. O.; Marqués, F. M.; Matta, A.; Ménager, L.; Morfouace, P.; Orr, N. A.; Pancin, J.; Pereira-Lopez, X.; Perrot, L.; Piot, J.; Pollacco, E.; Ramos, D.; Roger, T.; Rotaru, F.; Sánchez-Benítez, A. M.; Sénoville, M.; Sorlin, O.; Stanoiu, M.; Stefan, I.; Stodel, C.; Suzuki, D.; Thomas, J. -C.; Vandebrouck, M.

doi:10.1016/j.physletb.2022.137057

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

Journal Article · Wed Jun 01 00:00:00 EDT 2022 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2022.137057· OSTI ID:1861450

;

; Blumenfeld, Y.; Guillot, J.; Sagawa, H.;

; Honma, M.;

;

; Borcea, R.; Catford, W. N.; Clément, E.;

; Caamaño, M.; Corsi, A.; De France, G.;

; De Séréville, N.; Fernandez-Dominguez, B.; Fisichella, M. more »

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.

View Journal Article

Cite

Export

Save

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); European Union (EU)

Grant/Contract Number:: AC02-05CH11231; 262010

OSTI ID:: 1861450

Alternate ID(s):: OSTI ID: 1905766

Journal Information:: Physics Letters B, Journal Name: Physics Letters B Vol. 829 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

References (31)

Collective T=0 pairing in N=Z nuclei? Pairing vibrations around 56Ni revisited Macchiavelli, A. O.; Fallon, P.; Clark, R. M. Physics Letters B, Vol. 480, Issue 1-2 https://doi.org/10.1016/S0370-2693(00)00381-6	journal	May 2000
CATS, a low pressure multiwire proportionnal chamber for secondary beam tracking at GANIL Ottini-Hustache, S.; Mazur, C.; Auger, F. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 431, Issue 3 https://doi.org/10.1016/S0168-9002(99)00380-0	journal	July 1999
Cooper pair transfer in nuclei Potel, G.; Idini, A.; Barranco, F. Reports on Progress in Physics, Vol. 76, Issue 10 https://doi.org/10.1088/0034-4885/76/10/106301	journal	October 2013
Competition between T = 0 and T = 1 pairing in proton-rich nuclei Satuła, W.; Wyss, R. Physics Letters B, Vol. 393, Issue 1-2 https://doi.org/10.1016/S0370-2693(96)01603-6	journal	February 1997
The effective interaction between nucleons deduced from nuclear spectra Schiffer, John P.; True, William W. Reviews of Modern Physics, Vol. 48, Issue 2 https://doi.org/10.1103/RevModPhys.48.191	journal	April 1976
Coupled reaction channels calculations in nuclear physics Thompson, Ian J. Computer Physics Reports, Vol. 7, Issue 4 https://doi.org/10.1016/0167-7977(88)90005-6	journal	April 1988
Measurements on a prototype segmented Clover detector Shepherd, S. L.; Nolan, P. J.; Cullen, D. M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 434, Issue 2-3 https://doi.org/10.1016/S0168-9002(99)00524-0	journal	September 1999
Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ${}^{88}{Ru}$ Cederwall, B.; Liu, X.; Aktas, Ö. Physical Review Letters, Vol. 124, Issue 6 https://doi.org/10.1103/PhysRevLett.124.062501	journal	February 2020
Nucleon-Nucleus Optical-Model Parameters, $A > 40$ , $E < 50$ MeV Becchetti, F. D.; Greenlees, G. W. Physical Review, Vol. 182, Issue 4 https://doi.org/10.1103/PhysRev.182.1190	journal	June 1969
Enhancement of deuteron transfer reactions by neutron-proton pairing correlations Fröbrich, P. Physics Letters B, Vol. 37, Issue 4 https://doi.org/10.1016/0370-2693(71)90195-X	journal	December 1971
NPTool: a simulation and analysis framework for low-energy nuclear physics experiments Matta, A.; Morfouace, P.; Séréville, N. de Journal of Physics G: Nuclear and Particle Physics, Vol. 43, Issue 4 https://doi.org/10.1088/0954-3899/43/4/045113	journal	March 2016
Theory of Superconductivity Bardeen, J.; Cooper, L. N.; Schrieffer, J. R. Physical Review, Vol. 108, Issue 5 https://doi.org/10.1103/PhysRev.108.1175	journal	December 1957
Investigating neutron-proton pairing in $s d$ -shell nuclei via $(p, {}^{3}{He})$ and $({}^{3}{He}, p)$ transfer reactions Ayyad, Y.; Lee, J.; Tamii, A. Physical Review C, Vol. 96, Issue 2 https://doi.org/10.1103/PhysRevC.96.021303	journal	August 2017
New effective interaction for $p f$ -shell nuclei and its implications for the stability of the $N = Z = 28$ closed core Honma, M.; Otsuka, T.; Brown, B. A. Physical Review C, Vol. 69, Issue 3 https://doi.org/10.1103/PhysRevC.69.034335	journal	March 2004
Competition between $T = 1$ and $T = 0$ pairing in $p f$ -shell nuclei with $N = Z$ Sagawa, H.; Tanimura, Y.; Hagino, K. Physical Review C, Vol. 87, Issue 3 https://doi.org/10.1103/PhysRevC.87.034310	journal	March 2013
Spin-triplet pairing in large nuclei Bertsch, G. F.; Luo, Y. Physical Review C, Vol. 81, Issue 6 https://doi.org/10.1103/PhysRevC.81.064320	journal	June 2010
Note on the two-nucleon stripping reaction Yoshida, Shiro Nuclear Physics, Vol. 33 https://doi.org/10.1016/0029-5582(62)90559-X	journal	May 1962
Pairing vibrations Bès, D. R.; Broglia, R. A. Nuclear Physics, Vol. 80, Issue 2 https://doi.org/10.1016/0029-5582(66)90090-3	journal	May 1966
Symmetry restoration in mixed-spin paired heavy nuclei Rrapaj, Ermal; Macchiavelli, A. O.; Gezerlis, Alexandros Physical Review C, Vol. 99, Issue 1 https://doi.org/10.1103/PhysRevC.99.014321	journal	January 2019
Error Propagation for Large Errors Seiler, Fritz A. Risk Analysis, Vol. 7, Issue 4 https://doi.org/10.1111/j.1539-6924.1987.tb00487.x	journal	December 1987
Is there $np$ pairing in $N = Z$ nuclei? Macchiavelli, A. O.; Fallon, P.; Clark, R. M. Physical Review C, Vol. 61, Issue 4 https://doi.org/10.1103/PhysRevC.61.041303	journal	March 2000
Neutron–Proton Pairs in Nuclei Van Isacker, P. International Journal of Modern Physics E, Vol. 22, Issue 11 https://doi.org/10.1142/S0218301313300282	journal	November 2013
Effects of deformation on the coexistence between neutron-proton and particle-like pairing in $N = Z$ medium-mass nuclei Gambacurta, Danilo; Lacroix, Denis Physical Review C, Vol. 91, Issue 1 https://doi.org/10.1103/PhysRevC.91.014308	journal	January 2015
Enhancement of high-spin collectivity in N=Z nuclei by the isoscalar neutron–proton pairing Kaneko, K.; Sun, Y.; de Angelis, G. Nuclear Physics A, Vol. 957 https://doi.org/10.1016/j.nuclphysa.2016.08.007	journal	January 2017
Pairing and the structure of the pf-shell N∼Z nuclei Poves, Alfredo; Martinez-Pinedo, Gabriel Physics Letters B, Vol. 430, Issue 3-4 https://doi.org/10.1016/S0370-2693(98)00538-3	journal	July 1998
The achromatic spectrometer LISE at GANIL Anne, R.; Bazin, D.; Mueller, A. C. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 257, Issue 2 https://doi.org/10.1016/0168-9002(87)90741-8	journal	June 1987
A global nucleon optical model potential Varner, R. L.; Thompson, W. J.; McAbee, T. L. Physics Reports, Vol. 201, Issue 2 https://doi.org/10.1016/0370-1573(91)90039-O	journal	March 1991
Overview of neutron–proton pairing Frauendorf, S.; Macchiavelli, A. O. Progress in Particle and Nuclear Physics, Vol. 78 https://doi.org/10.1016/j.ppnp.2014.07.001	journal	September 2014
Partial-wave contributions to pairing in nuclei Baroni, Simone; Macchiavelli, Augusto O.; Schwenk, Achim Physical Review C, Vol. 81, Issue 6 https://doi.org/10.1103/PhysRevC.81.064308	journal	June 2010
Mixed-Spin Pairing Condensates in Heavy Nuclei Gezerlis, Alexandros; Bertsch, G. F.; Luo, Y. L. Physical Review Letters, Vol. 106, Issue 25 https://doi.org/10.1103/PhysRevLett.106.252502	journal	June 2011
MUST2: A new generation array for direct reaction studies Pollacco, E.; Beaumel, D.; Roussel-Chomaz, P. The European Physical Journal A, Vol. 25, Issue S1 https://doi.org/10.1140/epjad/i2005-06-162-5	journal	July 2005

Similar Records

Isospin character of low-lying states in {sup 56}Fe

Journal Article · Sat Jun 01 00:00:00 EDT 1996 · Physical Review, C · OSTI ID:1861450

De Leo, R; Akimune, H; Blasi, N; +31 more

Neutron-proton pairing correction in the extended isovector and isoscalar pairing model

Journal Article · Wed Oct 07 00:00:00 EDT 2020 · Physical Review. C · OSTI ID:1861450

Pan, Feng; He, Yingwen; Wu, Yingxin; +3 more

Isoscalar and isovector pair correlations in an isospin-invariant pairing plus quadrupole model

Journal Article · Mon Feb 01 00:00:00 EST 1999 · Physical Review, C · OSTI ID:1861450

Kaneko, K; Hasegawa, M; Zhang, J

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
radioactive beam
direct reactions
neutron-proton pairing
Cooper pairs

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

Citation Formats

References (31)

Similar Records

Related Subjects