Quasifree (p, pN) scattering of light neutron-rich nuclei near N=14
Journal article, 2018
Background: For many years, quasifree scattering reactions in direct kinematics have been extensively used to study the structure of stable nuclei, demonstrating the potential of this approach. The (RB)-B-3 collaboration has performed a pilot experiment to study quasifree scattering reactions in inverse kinematics for a stable C-12 beam. The results from that experiment constitute the first quasifree scattering results in inverse and complete kinematics. This technique has lately been extended to exotic beams to investigate the evolution of shell structure, which has attracted much interest due to changes in shell structure if the number of protons or neutrons is varied. Purpose: In this work we investigate for the first time the quasifree scattering reactions (p, pn) and (p, 2p) simultaneously for the same projectile in inverse and complete kinematics for radioactive beams with the aim to study the evolution of single-particle properties from N = 14 to N = 15. Method: The structure of the projectiles O-23, O-22, and N-21 has been studied simultaneously via (p, pn) and (p, 2p) quasifree knockout reactions in complete inverse kinematics, allowing the investigation of proton and neutron structure at the same time. The experimental data were collected at the (RB)-B-3-LAND setup at GSI at beam energies of around 400 MeV/u. Two key observables have been studied to shed light on the structure of those nuclei: the inclusive cross sections and the corresponding momentum distributions. Conclusions: The knockout reactions (p, pn) and (p, 2p) with radioactive beams in inverse kinematics have provided important and complementary information for the study of shell evolution and structure. For the (p, pn) channels, indications of a change in the structure of these nuclei moving from N = 14 to N = 15 have been observed, i.e., from the 0d(5/2) shell to the 1s(1/2). This supports previous observations of a subshell closure at N = 14 for neutron-rich oxygen isotopes and its weakening for the nitrogen isotopes.
Author
Paloma Diaz Fernandez
Universidade de Santiagode Compostela
Chalmers, Physics, Subatomic and Plasma Physics
Julius Hagdahl
Student at Chalmers
Andreas Martin Heinz
Chalmers, Physics, Subatomic and Plasma Physics
Håkan T Johansson
Chalmers, Physics, Subatomic and Plasma Physics
Björn Jonson
Chalmers, Physics, Subatomic and Plasma Physics
Simon Lindberg
Chalmers, Physics, Subatomic and Plasma Physics
Thomas Nilsson
Chalmers, Physics, Subatomic and Plasma Physics
Ronja Thies
Chalmers, Physics, Subatomic and Plasma Physics
H. Alvarez-Pol
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
J. M. Boillos
Universidade de Santiagode Compostela
M. Caamano
Universidade de Santiagode Compostela
P. Cabanelas
Universidade de Santiagode Compostela
D. Cortina-Gil
Universidade de Santiagode Compostela
B. Fernandez-Dominguez
Universidade de Santiagode Compostela
B. Pietras
Universidade de Santiagode Compostela
R. Crespo
Instituto Superior Tecnico
University of Lisbon
E. Cravo
University of Lisbon
L. Atar
Technische Universität Darmstadt
T. Aumann
Helmholtz
Technische Universität Darmstadt
C. Caesar
Technische Universität Darmstadt
Helmholtz
J. Enders
Technische Universität Darmstadt
M. Heine
Technische Universität Darmstadt
M. Holl
Technische Universität Darmstadt
A. Hufnagel
Technische Universität Darmstadt
A. Ignatov
Technische Universität Darmstadt
T. Kroell
Technische Universität Darmstadt
A. Movsesyan
Technische Universität Darmstadt
V. Panin
Technische Universität Darmstadt
S. Paschalis
Technische Universität Darmstadt
University of York
M. Petri
University of York
Technische Universität Darmstadt
H. Scheit
Technische Universität Darmstadt
I. Syndikus
Technische Universität Darmstadt
V. Volkov
Technische Universität Darmstadt
F. Wamers
Technische Universität Darmstadt
Helmholtz
A. Deltuva
Vilnius University
D. Jurciukonis
Vilnius University
K. Boretzky
Helmholtz
I. Dillmann
Helmholtz
Justus Liebig University Giessen
A. Estrade
Helmholtz
Saint Mary's University
F. Farinon
Helmholtz
H. Geissel
Helmholtz
M. Heil
Helmholtz
A. Kelic-Heil
Helmholtz
N. Kurz
Helmholtz
J. Marganiec
Helmholtz
C. Nociforo
Helmholtz
S. Pietri
Helmholtz
D. Rossi
Helmholtz
H. Simon
Helmholtz
H. Weick
Helmholtz
J. S. Winfield
Helmholtz
V. Avdeichikov
Lund University
J. Cederkall
Lund University
P. Golubev
Lund University
A. Knyazev
Lund University
S. Beceiro-Novo
Michigan State University
D. Bemmerer
Helmholtz
Z. Elekes
Helmholtz
M. Roeder
Helmholtz
Technische Universität Dresden
A. Wagner
Helmholtz
D. Yakorev
Helmholtz
C. A. Bertulani
Texas A&M University
M. J. G. Borge
Spanish National Research Council (CSIC)
E. Nacher
Spanish National Research Council (CSIC)
A. Perea
Spanish National Research Council (CSIC)
G. Ribeiro
Spanish National Research Council (CSIC)
O. Tengblad
Spanish National Research Council (CSIC)
E. Casarejos
University of Vigo
W. Catford
University of Surrey
G. Wilson
University of Surrey
M. Chartier
University of Liverpool
J. T. Taylor
University of Liverpool
L. V. Chulkov
National Research Centre "Kurchatov Institute"
E. Nikolskii
National Research Centre "Kurchatov Institute"
U. Datta Pramanik
Saha Institute of Nuclear Physics
O. Ershova
Goethe University Frankfurt
K. Goebel
Goethe University Frankfurt
T. Heftrich
Goethe University Frankfurt
C. Langer
Goethe University Frankfurt
R. Plag
Goethe University Frankfurt
R. Reifarth
Goethe University Frankfurt
R. Kanungo
Saint Mary's University
L. M. Fraile
Complutense University
M. Freer
University of Birmingham
C. Wheldon
University of Birmingham
D. Galaviz
Lipoxen Plc
University of Lisbon
A. Henriques
Lipoxen Plc
P. Velho
Lipoxen Plc
R. Gernhaeuser
Technical University of Munich
T. Le Bleis
Technical University of Munich
N. Kalantar-Nayestanaki
University of Groningen
A. Najafi
University of Groningen
C. Rigollet
University of Groningen
M. Labiche
Daresbury Laboratory
R. Lemmon
Daresbury Laboratory
J. Machado
Nova University of Lisbon
D. Savran
FIAS
Helmholtz
Y. Togano
Helmholtz
A. M. Moro
University of Seville
K. Zuber
Technische Universität Dresden
O. Sorlin
Centre national de la recherche scientifique (CNRS)
M. Vandebrouck
Grand Accélérateur National d'Ions Lourds (GANIL)
Mikhail Zhukov
Chalmers, Physics
P. Woods
University of Edinburgh
A. Zilges
University of Cologne
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 97 2 024311Construction of FAIR-NUSTAR experiments
Swedish Research Council (VR) (2014-06644), 2016-01-01 -- 2018-12-31.
Experimental 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
Accelerator Physics and Instrumentation
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevC.97.024311