Strong Neutron Pairing in core+4n Nuclei
Journal article, 2018
The emission of neutron pairs from the neutron-rich N=12 isotones C18 and O20 has been studied by high-energy nucleon knockout from N19 and O21 secondary beams, populating unbound states of the two isotones up to 15 MeV above their two-neutron emission thresholds. The analysis of triple fragment-n-n correlations shows that the decay N19(-1p)C18∗→C16+n+n is clearly dominated by direct pair emission. The two-neutron correlation strength, the largest ever observed, suggests the predominance of a C14 core surrounded by four valence neutrons arranged in strongly correlated pairs. On the other hand, a significant competition of a sequential branch is found in the decay O21(-1n)O20∗→O18+n+n, attributed to its formation through the knockout of a deeply bound neutron that breaks the O16 core and reduces the number of pairs.
Author
A. Revel
IN2P3 Institut National de Physique Nucleaire et de Physique des Particules
ENSICAEN Ecole Nationale Superieure d'Ingenieurs de Caen
F. M. Marqués
ENSICAEN Ecole Nationale Superieure d'Ingenieurs de Caen
Olivier Sorlin
IN2P3 Institut National de Physique Nucleaire et de Physique des Particules
T. Aumann
Technische Universität Darmstadt
Helmholtz
C. Caesar
Helmholtz
Technische Universität Darmstadt
M. Holl
Technische Universität Darmstadt
V. Panin
Technische Universität Darmstadt
M. Vandebrouck
University Paris-Saclay
F. Wamers
Technische Universität Darmstadt
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Atar
Technische Universität Darmstadt
V.V. Avdeichikov
Lund University
S. Beceiro-Novo
Michigan State University
D. Bemmerer
Helmholtz
J. Benlliure
Universidade de Santiagode Compostela
C.A. Bertulani
Texas A&M University
J. M. Boillos
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz
M. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
M. Caamano
Universidade de Santiagode Compostela
E. Casarejos
University of Vigo
W. N. Catford
University of Surrey
J. Cederkall
Lund University
M. Chartier
University of Liverpool
L. V. Chulkov
Helmholtz
National Research Centre "Kurchatov Institute"
D. Cortina-Gil
Universidade de Santiagode Compostela
E. Cravo
University of Lisbon
R. Crespo
Instituto Superior Tecnico
U. Datta Pramanik
Saha Institute of Nuclear Physics
Paloma Diaz Fernandez
Universidade de Santiagode Compostela
I. Dillmann
Justus Liebig University Giessen
Helmholtz
Z. Elekes
Hungarian Academy of Sciences
J. Enders
Technische Universität Darmstadt
O. Ershova
Helmholtz
A. Estradé
University of Edinburgh
F. Farinon
Helmholtz
L. M. Fraile
Complutense University
M. Freer
University of Birmingham
D. Galaviz
University of Lisbon
Laboratory of Instrumentation and Experimental Particle Physics
H. Geissel
Helmholtz
R. Gernhäuser
Technical University of Munich
P.I. Golubev
Lund University
K. Gobel
Goethe University Frankfurt
Julius Hagdahl
Chalmers, Physics, Subatomic and Plasma Physics
T. Heftrich
Goethe University Frankfurt
M. Heil
Helmholtz
M. Heine
Centre national de la recherche scientifique (CNRS)
Andreas Martin Heinz
Chalmers, Physics, Subatomic and Plasma Physics
A. Henriques
Laboratory of Instrumentation and Experimental Particle Physics
A. Ignatov
Technische Universität Darmstadt
Håkan T Johansson
Chalmers, Physics, Subatomic and Plasma Physics
Björn Jonson
Chalmers, Physics, Subatomic and Plasma Physics
J. Kahlbow
Technische Universität Darmstadt
N. Kalantar-Nayestanaki
Kernfysisch Versneller Institut
R. Kanungo
Saint Mary's University
A. Kelic-Heil
Helmholtz
A. Knyazev
Lund University
T. Kröll
Technische Universität Darmstadt
N. Kurz
Helmholtz
M. Labiche
Daresbury Laboratory
C. Langer
Goethe University Frankfurt
T. Le Bleis
Technical University of Munich
R.C. Lemmon
Daresbury Laboratory
Simon Lindberg
Chalmers, Physics, Subatomic and Plasma Physics
J. Machado
Nova University of Lisbon
J. Marganiec
Helmholtz
Technische Universität Darmstadt
A. Movsesyan
Technische Universität Darmstadt
E. Nacher
CSIC - Instituto de Estructura de la Materia (IEM)
M. A. Najafi
Kernfysisch Versneller Institut
Thomas Nilsson
Chalmers, Physics, Subatomic and Plasma Physics
C. Nociforo
Helmholtz
S. Paschalis
Technische Universität Darmstadt
University of York
A. Perea
CSIC - Instituto de Estructura de la Materia (IEM)
M. Petri
University of York
Technische Universität Darmstadt
S. Pietri
Helmholtz
R. Plag
Helmholtz
R. Reifarth
Goethe University Frankfurt
G. Ribeiro
CSIC - Instituto de Estructura de la Materia (IEM)
C. Rigollet
Kernfysisch Versneller Institut
M. Röder
Helmholtz
Technische Universität Dresden
D. Rossi
Helmholtz
D. Savran
Helmholtz
H. Scheit
Technische Universität Darmstadt
H. Simon
Helmholtz
I. Syndikus
Technische Universität Darmstadt
J.E. Taylor
University of Liverpool
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
Ronja Thies
Chalmers, Physics, Subatomic and Plasma Physics
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 120 15 152504Experimental studies of exotic, light nuclear systems - combining front-line physics and FAIR preparations
Swedish Research Council (VR) (2011-5324), 2012-01-01 -- 2014-12-31.
Exotiska nukleära system vid gränsen för existens - fysik i frontlinjen med perspektiv mot FAIR
Swedish Research Council (VR) (2017-03839), 2018-01-01 -- 2021-12-31.
Subject Categories
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevLett.120.152504