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
Spanish National Research Council (CSIC)
E. Nacher
Spanish National Research Council (CSIC)
O. Tengblad
Spanish National Research Council (CSIC)
Paloma Diaz Fernandez
Chalmers, Physics, Subatomic and Plasma Physics
Y. Aksyutina
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Atar
Technische Universität Darmstadt
Helmholtz
T. Aumann
Helmholtz
Technische Universität Darmstadt
V Avdeichikov
Lund University
S. Beceiro-Novo
Universidade de Santiagode Compostela
Michigan State University
D. Bemmerer
Helmholtz
J. Benlliure
Universidade de Santiagode Compostela
C. A. Bertulani
Texas A&M University
J. M. Boillos
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz
M. J. G. Borge
Spanish National Research Council (CSIC)
M. Caamano
Universidade de Santiagode Compostela
C. Caesar
Technische Universität Darmstadt
E. Casarejos
University of Vigo
W. Catford
University of Surrey
J. Cederkall
Lund University
M. Chartier
University of Liverpool
L. Chulkov
Helmholtz
National Research Centre "Kurchatov Institute"
D. Cortina-Gil
Universidade de Santiagode Compostela
E. Cravo
Instituto Superior Tecnico
R. Crespo
Instituto Superior Tecnico
U. Datta Pramanik
Saha Institute of Nuclear Physics
I Dillmann
Helmholtz
Z. Elekes
Helmholtz
J. Enders
Technische Universität Darmstadt
O. Ershova
Goethe University Frankfurt
A. Estrade
Saint Mary's University
Helmholtz
F. Farinon
Helmholtz
L. M. Fraile
Complutense University
M. Freer
University of Birmingham
H. O. U. Fynbo
Aarhus University
D. Galaviz
University of Lisbon
H. Geissel
Helmholtz
R. Gernhaeuser
Technical University of Munich
P. Golubev
Lund University
K. Goebel
Goethe University Frankfurt
J. Hagdahl
Saab
T. Heftrich
Goethe University Frankfurt
M. Heil
Helmholtz
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
Helmholtz
N. Kurz
Helmholtz
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
Helmholtz
Technische Universität Darmstadt
A. Movsesyan
Technische Universität Darmstadt
Thomas Nilsson
Chalmers, Physics
C. Nociforo
Helmholtz
V Panin
Technische Universität Darmstadt
RIKEN
S. Paschalis
Technische Universität Darmstadt
University of York
A. Perea
Spanish National Research Council (CSIC)
M. Petri
University of York
Technische Universität Darmstadt
S. Pietri
Helmholtz
R. Plag
Goethe University Frankfurt
R. Reifarth
Goethe University Frankfurt
C. Rigollet
University of Groningen
K. Riisager
Aarhus University
D. Rossi
Helmholtz
Technische Universität Darmstadt
M. Roeder
Technische Universität Dresden
Helmholtz
D. Savran
Helmholtz
FIAS
H. Scheit
Technische Universität Darmstadt
H. Simon
Helmholtz
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
F. Wamers
Technische Universität Darmstadt
Helmholtz
M. Vandebrouck
Grand Accélérateur National d'Ions Lourds (GANIL)
H. Weick
Helmholtz
C. Wheldon
University of Birmingham
G. Wilson
University of Surrey
C. Wimmer
Goethe University Frankfurt
J. S. Winfield
Helmholtz
P. Woods
University of Edinburgh
Mikhail Zhukov
Chalmers, Physics
A. Zilges
University of Cologne
K. Zuber
Technische Universität Dresden
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 98 2 024603Experimental 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.
Subject Categories
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevC.98.024603