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. 795 682-688

Experimentella 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

Mer information

Senast uppdaterat

2020-09-15