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

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

M. Zhukov

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

University of Lisbon

Inst Super Tecn

E. Cravo

University of Lisbon

L. Atar

Technische Universität Darmstadt

T. Aumann

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

C. Caesar

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

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

University of York

Technische Universität Darmstadt

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

GSI Helmholtz Centre for Heavy Ion Research

A. Deltuva

Vilnius University

D. Jurciukonis

Vilnius University

K. Boretzky

GSI Helmholtz Centre for Heavy Ion Research

I. Dillmann

GSI Helmholtz Centre for Heavy Ion Research

Justus Liebig University Giessen

A. Estrade

GSI Helmholtz Centre for Heavy Ion Research

Saint Mary's University

F. Farinon

GSI Helmholtz Centre for Heavy Ion Research

H. Geissel

GSI Helmholtz Centre for Heavy Ion Research

M. Heil

GSI Helmholtz Centre for Heavy Ion Research

A. Kelic-Heil

GSI Helmholtz Centre for Heavy Ion Research

N. Kurz

GSI Helmholtz Centre for Heavy Ion Research

J. Marganiec

GSI Helmholtz Centre for Heavy Ion Research

C. Nociforo

GSI Helmholtz Centre for Heavy Ion Research

S. Pietri

GSI Helmholtz Centre for Heavy Ion Research

D. Rossi

GSI Helmholtz Centre for Heavy Ion Research

H. Simon

GSI Helmholtz Centre for Heavy Ion Research

H. Weick

GSI Helmholtz Centre for Heavy Ion Research

J. S. Winfield

GSI Helmholtz Centre for Heavy Ion Research

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-Zentrum Dresden-Rossendorf

Z. Elekes

Helmholtz-Zentrum Dresden-Rossendorf

M. Roeder

Helmholtz-Zentrum Dresden-Rossendorf

Technische Universität Dresden

A. Wagner

Helmholtz-Zentrum Dresden-Rossendorf

D. Yakorev

Helmholtz-Zentrum Dresden-Rossendorf

C. A. Bertulani

Texas A&M University

M. J. G. Borge

Consejo Superior de Investigaciones Científicas

E. Nacher

Consejo Superior de Investigaciones Científicas

A. Perea

Consejo Superior de Investigaciones Científicas

G. Ribeiro

Consejo Superior de Investigaciones Científicas

O. Tengblad

Consejo Superior de Investigaciones Científicas

E. Casarejos

Universidad de 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

GSI Helmholtz Centre for Heavy Ion Research

Y. Togano

GSI Helmholtz Centre for Heavy Ion Research

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)

P. Woods

University of Edinburgh

A. Zilges

University of Cologne

Physical Review C

2469-9985 (ISSN) 2469-9993 (eISSN)

Vol. 97 2 024311

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Subject Categories

Accelerator Physics and Instrumentation

Subatomic Physics

Physical Sciences

Roots

Basic sciences

DOI

10.1103/PhysRevC.97.024311

More information

Latest update

5/9/2019 5