Structure of Be-13 studied in proton knockout from B-14
Journal article, 2018

The neutron-unbound isotope Be-13 has been studied in several experiments using different reactions, different projectile energies, and different experimental setups. There is, however, no real consensus in the interpretation of the data, in particular concerning the structure of the low-lying excited states. Gathering new experimental information, which may reveal the Be-13 structure, is a challenge, particularly in light of its bridging role between Be-12, where the N = 8 neutron shell breaks down, and the Borromean halo nucleus Be-14. The purpose of the present study is to investigate the role of bound excited states in the reaction product Be-12 after proton knockout from B-14, by measuring coincidences between Be-12, neutrons, and gamma rays originating from de-excitation of states fed by neutron decay of Be-13. The Be-13 isotopes were produced in proton knockout from a 400 MeV/nucleon B-14 beam impinging on a CH2 target. The Be-12-n relative-energy spectrum d sigma/dE(fn) was obtained from coincidences between Be-12(g.s.) and a neutron, and also as threefold coincidences by adding gamma rays, from the de-excitation of excited states in Be-12. Neutron decay from the first 5/2(+) state in Be-13 to the 2(+) state in Be-12 at 2.11 MeV is confirmed. An energy independence of the proton-knockout mechanism is found from a comparison with data taken with a 35 MeV/nucleon B-14 beam. A low-lying p-wave resonance in Be-13(1/2(-)) is confirmed by comparing proton- and neutron-knockout data from B-14 and Be-14.

Author

G. Ribeiro

Consejo Superior de Investigaciones Científicas

E. Nacher

Consejo Superior de Investigaciones Científicas

O. Tengblad

Consejo Superior de Investigaciones Científicas

Paloma Diaz Fernandez

Chalmers, Physics, Subatomic and Plasma Physics

Y. Aksyutina

GSI Helmholtz Centre for Heavy Ion Research

H. Alvarez-Pol

Universidade de Santiagode Compostela

L. Atar

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

T. Aumann

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

V Avdeichikov

Lund University

S. Beceiro-Novo

Universidade de Santiagode Compostela

Michigan State University

D. Bemmerer

Helmholtz-Zentrum Dresden-Rossendorf

J. Benlliure

Universidade de Santiagode Compostela

C. A. Bertulani

Texas A&M University

J. M. Boillos

Universidade de Santiagode Compostela

K. Boretzky

GSI Helmholtz Centre for Heavy Ion Research

M. J. G. Borge

Consejo Superior de Investigaciones Científicas

M. Caamano

Universidade de Santiagode Compostela

C. Caesar

Technische Universität Darmstadt

E. Casarejos

Universidad de Vigo

W. Catford

University of Surrey

J. Cederkall

Lund University

M. Chartier

University of Liverpool

L. Chulkov

GSI Helmholtz Centre for Heavy Ion Research

National Research Centre "Kurchatov Institute"

D. Cortina-Gil

Universidade de Santiagode Compostela

E. Cravo

Inst Super Tecn

R. Crespo

Inst Super Tecn

U. Datta Pramanik

Saha Institute of Nuclear Physics

I Dillmann

GSI Helmholtz Centre for Heavy Ion Research

Z. Elekes

Helmholtz-Zentrum Dresden-Rossendorf

J. Enders

Technische Universität Darmstadt

O. Ershova

Goethe University Frankfurt

A. Estrade

GSI Helmholtz Centre for Heavy Ion Research

Saint Mary's University

F. Farinon

GSI Helmholtz Centre for Heavy Ion Research

L. M. Fraile

Complutense University

M. Freer

University of Birmingham

H. O. U. Fynbo

Aarhus University

D. Galaviz

University of Lisbon

H. Geissel

GSI Helmholtz Centre for Heavy Ion Research

R. Gernhaeuser

Technical University of Munich

P. Golubev

Lund University

K. Goebel

Goethe University Frankfurt

J. Hagdahl

T. Heftrich

Goethe University Frankfurt

M. Heil

GSI Helmholtz Centre for Heavy Ion Research

M. Heine

Technische Universität Darmstadt

Andreas Martin Heinz

Chalmers, Physics, Subatomic and Plasma Physics

A. Henriques

University of Lisbon

M. Holl

Technische Universität Darmstadt

A. Hufnagel

Technische Universität Darmstadt

A. Ignatov

Technische Universität Darmstadt

Håkan T Johansson

Chalmers, Physics, Subatomic and Plasma Physics

Björn Jonson

Chalmers, Physics, Subatomic and Plasma Physics

N. Kalantar-Nayestanaki

University of Groningen

R. Kanungo

Saint Mary's University

A. Kelic-Heil

GSI Helmholtz Centre for Heavy Ion Research

N. Kurz

GSI Helmholtz Centre for Heavy Ion Research

T. Kroell

Technische Universität Darmstadt

M. Labiche

Daresbury Laboratory

C. Langer

Goethe University Frankfurt

T. Le Bleis

Technical University of Munich

R. Lemmon

Daresbury Laboratory

Simon Lindberg

Chalmers, Physics, Subatomic and Plasma Physics

J. Machado

University of Lisbon

J. Marganiec

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

A. Movsesyan

Technische Universität Darmstadt

Thomas Nilsson

Chalmers, Physics

C. Nociforo

GSI Helmholtz Centre for Heavy Ion Research

V Panin

Technische Universität Darmstadt

RIKEN

S. Paschalis

University of York

Technische Universität Darmstadt

A. Perea

Consejo Superior de Investigaciones Científicas

M. Petri

Technische Universität Darmstadt

University of York

S. Pietri

GSI Helmholtz Centre for Heavy Ion Research

R. Plag

Goethe University Frankfurt

R. Reifarth

Goethe University Frankfurt

C. Rigollet

University of Groningen

K. Riisager

Aarhus University

D. Rossi

GSI Helmholtz Centre for Heavy Ion Research

Technische Universität Darmstadt

M. Roeder

Helmholtz-Zentrum Dresden-Rossendorf

Technische Universität Dresden

D. Savran

GSI Helmholtz Centre for Heavy Ion Research

FIAS

H. Scheit

Technische Universität Darmstadt

H. Simon

GSI Helmholtz Centre for Heavy Ion Research

O. Sorlin

Centre national de la recherche scientifique (CNRS)

I Syndikus

Technische Universität Darmstadt

J. T. Taylor

University of Liverpool

Ronja Thies

Chalmers, Physics, Subatomic and Plasma Physics

P. Velho

University of Lisbon

A. Wagner

Helmholtz-Zentrum Dresden-Rossendorf

F. Wamers

Technische Universität Darmstadt

GSI Helmholtz Centre for Heavy Ion Research

M. Vandebrouck

Grand Accélérateur National d'Ions Lourds (GANIL)

H. Weick

GSI Helmholtz Centre for Heavy Ion Research

C. Wheldon

University of Birmingham

G. Wilson

University of Surrey

C. Wimmer

Goethe University Frankfurt

J. S. Winfield

GSI Helmholtz Centre for Heavy Ion Research

P. Woods

University of Edinburgh

Mikhail Zhukov

Chalmers, Physics

A. Zilges

University of Cologne

K. Zuber

Technische Universität Dresden

PHYSICAL REVIEW C

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

Vol. 98 2 024603

Experimental studies of exotic, light nuclear systems - combining front-line physics and FAIR preparations

Swedish Research Council (VR), 2012-01-01 -- 2014-12-31.

Subject Categories

Subatomic Physics

Physical Sciences

Roots

Basic sciences

DOI

10.1103/PhysRevC.98.024603

More information

Latest update

5/9/2019 5