Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range
Artikel i vetenskaplig tidskrift, 2019
The quasi-free scattering reactions 11C(p,2p) and 10,11,12C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the R3B-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete measurements. The efficiency to detect these pairs has been obtained from GEANT4 simulations which were tested using the 12C(p,2p) and 12C(p,pn) reactions. Experimental cross sections and momentum distributions have been obtained and compared to DWIA calculations based on eikonal theory. The new results reported here are combined with previously published cross sections for quasi-free scattering from oxygen and nitrogen isotopes and together they enable a systematic study of the reduction of single-particle strength compared to predictions of the shell model over a wide neutron-to-proton asymmetry range. The combined reduction factors show a weak or no dependence on isospin asymmetry, in contrast to the strong dependency reported in nucleon-removal reactions induced by nuclear targets at lower energies. However, the reduction factors for (p,2p) are found to be 'significantly smaller than for (p,pn) reactions for all investigated nuclei.
neutrons
Shell model
Spectroscopic factors
Quasi-free scattering
nuclei
Inverse kinematics
Författare
M. Holl
Saint Mary's University
TRIUMF
Helmholtz
Technische Universität Darmstadt
V. Panin
RIKEN
Technische Universität Darmstadt
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Atar
Technische Universität Darmstadt
T. Aumann
Helmholtz
Technische Universität Darmstadt
S. Beceiro-Novo
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
C.A. Bertulani
Texas A&M University
J. M. Boillos
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz
M. Caamano
Universidade de Santiagode Compostela
C. Caesar
Helmholtz
Technische Universität Darmstadt
E. Casarejos
Universidad de Vigo
W. N. Catford
University of Surrey
J. Cederkall
Lunds universitet
L. V. Chulkov
National Research Centre "Kurchatov Institute"
D. Cortina-Gil
Universidade de Santiagode Compostela
E. Cravo
Faculdade de Ciencias, Universidade de Lisboa
I. Dillmann
Justus Liebig University Giessen
Helmholtz
Paloma Diaz Fernandez
Universidade de Santiagode Compostela
Chalmers, Fysik, Subatomär fysik och plasmafysik
Z. Elekes
Magyar Tudomanyos Akademia
J. Enders
Technische Universität Darmstadt
L. M. Fraile
Universidad Complutense de Madrid
D. Galaviz Redondo
LIP - Lisboa
Faculdade de Ciencias, Universidade de Lisboa
R. Gernhäuser
Technische Universität München
P.I. Golubev
Lunds universitet
T. Heftrich
Johann Wolfgang Goethe Universität Frankfurt am Main
M. Heil
Helmholtz
M. Heine
Université de Strasbourg
Andreas Martin Heinz
Chalmers, Fysik, Subatomär fysik och plasmafysik
A. Henriques
LIP - Lisboa
Håkan T Johansson
Chalmers, Fysik, Subatomär fysik och plasmafysik
Björn Jonson
Chalmers, Fysik, Subatomär fysik och plasmafysik
N. Kalantar-Nayestanaki
Kernfysisch Versneller Institut
R. Kanungo
Saint Mary's University
TRIUMF
A. Kelic-Heil
Helmholtz
T. Kröll
Technische Universität Darmstadt
N. Kurz
Helmholtz
C. Langer
Johann Wolfgang Goethe Universität Frankfurt am Main
T. Le Bleis
Technische Universität München
Simon Lindberg
Chalmers, Fysik, Subatomär fysik och plasmafysik
J. Machado
Universidade NOVA de Lisboa
E. Nacher
CSIC - Instituto de Estructura de la Materia (IEM)
M. A. Najafi
Kernfysisch Versneller Institut
Thomas Nilsson
Chalmers, Fysik
C. Nociforo
Helmholtz
S. Paschalis
University of York
Technische Universität Darmstadt
M. Petri
University of York
Technische Universität Darmstadt
R. Reifarth
Johann Wolfgang Goethe Universität Frankfurt am Main
G. Ribeiro
CSIC - Instituto de Estructura de la Materia (IEM)
C. Rigollet
Kernfysisch Versneller Institut
D. Rossi
Helmholtz
Technische Universität Darmstadt
D. Savran
Helmholtz
H. Scheit
Technische Universität Darmstadt
H. Simon
Helmholtz
Olivier Sorlin
Grand Accélérateur National d'Ions Lourds (GANIL)
I. Syndikus
Technische Universität Darmstadt
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
Y. Togano
RIKEN
M. Vandebrouck
Grand Accélérateur National d'Ions Lourds (GANIL)
P. Velho
LIP - Lisboa
F. Wamers
Helmholtz
Technische Universität Darmstadt
H. Weick
Helmholtz
C. Wheldon
University of Birmingham
G. L. Wilson
University of Surrey
J. S. Winfield
Helmholtz
P. J. Woods
University of Edinburgh
Mikhail Zhukov
Chalmers, Fysik
K. Zuber
Magyar Tudomanyos Akademia
Technische Universität Dresden
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 795 682-688Experimentella studier av exotiska, lätta nukleära system
Vetenskapsrådet (VR), 2012-01-01 -- 2014-12-31.
Ämneskategorier
Acceleratorfysik och instrumentering
Subatomär fysik
Teoretisk kemi
DOI
10.1016/j.physletb.2019.06.069