Structure of Be-13 studied in proton knockout from B-14
Artikel i vetenskaplig tidskrift, 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.
Författare
G. Ribeiro
Consejo Superior de Investigaciones Científicas (CSIC)
E. Nacher
Consejo Superior de Investigaciones Científicas (CSIC)
O. Tengblad
Consejo Superior de Investigaciones Científicas (CSIC)
Paloma Diaz Fernandez
Chalmers, Fysik, Subatomär fysik och plasmafysik
Y. Aksyutina
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Atar
Technische Universität Darmstadt
Helmholtz
T. Aumann
Helmholtz
Technische Universität Darmstadt
V Avdeichikov
Lunds universitet
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
Consejo Superior de Investigaciones Científicas (CSIC)
M. Caamano
Universidade de Santiagode Compostela
C. Caesar
Technische Universität Darmstadt
E. Casarejos
Universidad de Vigo
W. Catford
University of Surrey
J. Cederkall
Lunds universitet
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
Johann Wolfgang Goethe Universität Frankfurt am Main
A. Estrade
Saint Mary's University
Helmholtz
F. Farinon
Helmholtz
L. M. Fraile
Universidad Complutense de Madrid
M. Freer
University of Birmingham
H. O. U. Fynbo
Aarhus Universitet
D. Galaviz
Universidade de Lisboa
H. Geissel
Helmholtz
R. Gernhaeuser
Technische Universität München
P. Golubev
Lunds universitet
K. Goebel
Johann Wolfgang Goethe Universität Frankfurt am Main
J. Hagdahl
Saab
T. Heftrich
Johann Wolfgang Goethe Universität Frankfurt am Main
M. Heil
Helmholtz
M. Heine
Technische Universität Darmstadt
Andreas Martin Heinz
Chalmers, Fysik, Subatomär fysik och plasmafysik
A. Henriques
Universidade de Lisboa
M. Holl
Technische Universität Darmstadt
A. Hufnagel
Technische Universität Darmstadt
A. Ignatov
Technische Universität Darmstadt
Håkan T Johansson
Chalmers, Fysik, Subatomär fysik och plasmafysik
Björn Jonson
Chalmers, Fysik, Subatomär fysik och plasmafysik
N. Kalantar-Nayestanaki
Rijksuniversiteit 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
Johann Wolfgang Goethe Universität Frankfurt am Main
T. Le Bleis
Technische Universität München
R. Lemmon
Daresbury Laboratory
Simon Lindberg
Chalmers, Fysik, Subatomär fysik och plasmafysik
J. Machado
Universidade de Lisboa
J. Marganiec
Helmholtz
Technische Universität Darmstadt
A. Movsesyan
Technische Universität Darmstadt
Thomas Nilsson
Chalmers, Fysik
C. Nociforo
Helmholtz
V Panin
Technische Universität Darmstadt
RIKEN
S. Paschalis
Technische Universität Darmstadt
University of York
A. Perea
Consejo Superior de Investigaciones Científicas (CSIC)
M. Petri
University of York
Technische Universität Darmstadt
S. Pietri
Helmholtz
R. Plag
Johann Wolfgang Goethe Universität Frankfurt am Main
R. Reifarth
Johann Wolfgang Goethe Universität Frankfurt am Main
C. Rigollet
Rijksuniversiteit Groningen
K. Riisager
Aarhus Universitet
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, Fysik, Subatomär fysik och plasmafysik
P. Velho
Universidade de Lisboa
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
Johann Wolfgang Goethe Universität Frankfurt am Main
J. S. Winfield
Helmholtz
P. Woods
University of Edinburgh
Mikhail Zhukov
Chalmers, Fysik
A. Zilges
Universität zu Köln
K. Zuber
Technische Universität Dresden
PHYSICAL REVIEW C
2469-9985 (ISSN) 2469-9993 (eISSN)
Vol. 98 2 024603Experimentella studier av exotiska, lätta nukleära system
Vetenskapsrådet (VR) (2011-5324), 2012-01-01 -- 2014-12-31.
Ämneskategorier
Subatomär fysik
Fysik
Fundament
Grundläggande vetenskaper
DOI
10.1103/PhysRevC.98.024603