Magicity versus Superfluidity around 28O viewed from the Study of 30F
Journal article, 2024
The neutron-rich unbound fluorine isotope30F21has been observed for the first time by measuring itsneutron decay at the SAMURAI spectrometer (RIBF, RIKEN) in the quasifree proton knockout reactionof31Ne nuclei at235MeV=nucleon. The mass and thus one-neutron-separation energy of30F has been determined to beSn 1/4 -47258 & eth;stat & THORN;33 & eth;sys & THORN;keV from the measurement of its invariant-massspectrum. The absence of a sharp drop inSn & eth;30F & THORN;shows that the"magic"N 1/4 20shell gap is not restoredclose to28O, which is in agreement with our shell-model calculations that predict a near degeneracybetween the neutrondandfporbitals, with the1p3=2and1p1=2orbitals becoming more bound than the0f7=2one. This degeneracy and reordering of orbitals has two potential consequences:28O behaves like astrongly superfluid nucleus with neutron pairs scattering across shells, and both29;31F appear to be goodtwo-neutron halo-nucleus candidates
Author
J. Kahlbow
Massachusetts Institute of Technology (MIT)
Technische Universität Darmstadt
RIKEN
T. Aumann
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
O. Sorlin
Grand Accelerateur Natl Ions Lourds GANIL
Y. Kondo
Tokyo Institute of Technology
T. Nakamura
Tokyo Institute of Technology
F. Nowacki
University of Strasbourg
A. Revel
Grand Accelerateur Natl Ions Lourds GANIL
Univ Caen BasseNormandie
N. L. Achouri
Univ Caen BasseNormandie
H. Al Falou
Lebanese University
L. Atar
Technische Universität Darmstadt
H. Baba
RIKEN
K. Boretzky
Helmholtz Association of German Research Centres
C. Caesar
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
D. Calvet
University Paris-Saclay
H. Chae
Institute for Basic Science - Korea (IBS)
N. Chiga
RIKEN
A. Corsi
University Paris-Saclay
F. Delaunay
Univ Caen BasseNormandie
A. Delbart
University Paris-Saclay
Q. Deshayes
Univ Caen BasseNormandie
Z. Dombradi
HUN REN Inst Nucl Res
C. A. Douma
University of Groningen
Z. Elekes
HUN REN Inst Nucl Res
I. Gasparic
RIKEN
Ruder Boskovic Institute
J. -m. Gheller
University Paris-Saclay
J. Gibelin
Univ Caen BasseNormandie
A. Gillibert
University Paris-Saclay
M. N. Harakeh
Helmholtz Association of German Research Centres
University of Groningen
A. Hirayama
Tokyo Institute of Technology
M. Holl
University of Groningen
A. Horvat
University of Groningen
Eötvös Loránd University (ELTE)
J. . W. Hwang
Seoul National University
T. Isobe
RIKEN
N. Kalantar-Nayestanaki
University of Groningen
S. Kawase
Kyushu University
S. Kim
Seoul National University
K. Kisamori
RIKEN
T. Kobayashi
Tohoku University
D. Koerper
Helmholtz Association of German Research Centres
S. Koyama
University of Tokyo
I. Kuti
HUN REN Inst Nucl Res
V. Lapoux
University Paris-Saclay
Simon Lindberg
Chalmers, Physics, Subatomic and Plasma Physics
F. M. Marques
Univ Caen BasseNormandie
S. Masuoka
University of Tokyo
J. Mayer
University of Cologne
K. Miki
Michigan State University
T. Murakami
Kyoto University
M. Najafi
University of Groningen
K. Nakano
Kyushu University
N. Nakatsuka
Kyoto University
Thomas Nilsson
Chalmers, Physics
A. Obertelli
University Paris-Saclay
N. A. Orr
Univ Caen BasseNormandie
H. Otsu
RIKEN
V. Panin
RIKEN
S. Paschalis
Technische Universität Darmstadt
D. M. Rossi
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
A. T. Saito
Tokyo Institute of Technology
T. Saito
University of Tokyo
M. Sasano
RIKEN
H. Sato
RIKEN
Y. Satou
Seoul National University
H. Scheit
Technische Universität Darmstadt
F. Schindler
Technische Universität Darmstadt
P. Schrock
University of Tokyo
M. Shikata
Tokyo Institute of Technology
K. Shimada
Tokyo Institute of Technology
Y. Shimizu
RIKEN
H. Simon
Helmholtz Association of German Research Centres
D. Sohler
HUN REN Inst Nucl Res
L. Stuhl
Helmholtz Association of German Research Centres
Institute for Basic Science - Korea (IBS)
S. Takeuchi
Tokyo Institute of Technology
M. Tanaka
Osaka University
M. Thoennessen
Michigan State University
H. Tornqvist
Technische Universität Darmstadt
Helmholtz Association of German Research Centres
Y. Togano
Tokyo Institute of Technology
T. Tomai
Tokyo Institute of Technology
J. Tscheuschner
Technische Universität Darmstadt
J. Tsubota
Tokyo Institute of Technology
T. Uesaka
RIKEN
H. Wang
RIKEN
Z. Yang
RIKEN
M. Yasuda
Tokyo Institute of Technology
K. Yoneda
RIKEN
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 133 8 082501Subject Categories (SSIF 2011)
Subatomic Physics
DOI
10.1103/PhysRevLett.133.082501
PubMed
39241734