Studies of continuum states in (16) Ne using three-body correlation techniques
Artikel i vetenskaplig tidskrift, 2015
Two-proton decay of the unbound nucleus Ne-16 , produced in one-neutron knockout from a 500 MeV/u Ne-17 beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, ( MeV) above the O-14 +p+p threshold, and two narrow resonances at MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2(+) state and the 0(+) ground state in Ne-16 with its mirror nucleus C-16 reveals a small Thomas-Ehrman shift (TES) of keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for F-16 obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the O-14 +p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the intermediate nucleus F-15 , the 3.22 MeV state predominantly via the F-15 ground-state resonance, while the 7.57 MeV state decays via the 5/2(+) resonance in F-15 at 2.8 MeV above the O-14 +p+p threshold. Further, from an analysis of angular correlations, the spin-parity of the 7.57 MeV state has been determined as and assigned as the third 2(+) state in Ne-16 based on a comparison with C-16.
Författare
J. Marganiec
Helmholtz
Technische Universität Darmstadt
F. Wamers
Helmholtz
Technische Universität Darmstadt
Frankfurt Institute for Advanced Studies
F. Aksouh
Helmholtz
Y. Aksyutina
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
T. Aumann
Technische Universität Darmstadt
Helmholtz
S. Beceiro-Novo
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz
M. J. G. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
CERN
M. Chartier
University of Liverpool
A. Chatillon
Helmholtz
L. V. Chulkov
National Research Centre "Kurchatov Institute"
Helmholtz
D. Cortina-Gil
Universidade de Santiagode Compostela
H. Emling
Helmholtz
O. Ershova
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
L.M. Fraile
Universidad Complutense de Madrid
H. O. U. Fynbo
Aarhus Universitet
D. Galaviz
CSIC - Instituto de Estructura de la Materia (IEM)
H. Geissel
Helmholtz
M. Heil
Helmholtz
D. H. H. Hoffmann
Technische Universität Darmstadt
J. Hoffmann
Helmholtz
Håkan T Johansson
Chalmers, Fundamental fysik
Björn Jonson
Chalmers, Fundamental fysik
C. Karagiannis
Helmholtz
O. A. Kiselev
Helmholtz
J. V. Kratz
Johannes Gutenberg-Universität Mainz
R. Kulessa
Uniwersytet Jagiellonski w Krakowie
N. Kurz
Helmholtz
C. Langer
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
M. Lantz
Uppsala universitet
T. Le Bleis
Helmholtz
Technische Universität München
R. Lemmon
Daresbury Laboratory
Y. A. Litvinov
Helmholtz
K. Mahata
Helmholtz
Bhabha Atomic Research Centre (BARC)
C. Muntz
Helmholtz
Thomas Nilsson
Chalmers, Fundamental fysik
C. Nociforo
Helmholtz
Göran Hugo Nyman
Chalmers, Fundamental fysik
W. Ott
Helmholtz
V. Panin
Helmholtz
Technische Universität Darmstadt
S. Paschalis
University of Liverpool
Technische Universität Darmstadt
A. Perea
CSIC - Instituto de Estructura de la Materia (IEM)
R. Plag
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
R. Reifarth
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
A. Richter
Technische Universität Darmstadt
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
D. Rossi
Helmholtz
K. Riisager
Aarhus Universitet
D. Savran
Helmholtz
Frankfurt Institute for Advanced Studies
G. Schrieder
Technische Universität Darmstadt
H. Simon
Helmholtz
J. Stroth
Johann Wolfgang Goethe Universität Frankfurt am Main
K. Summerer
Helmholtz
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
H. Weick
Helmholtz
M. Wiescher
University of Notre Dame
C. Wimmer
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
Mikhail Zhukov
Chalmers, Fundamental fysik
European Physical Journal A
1434-6001 (ISSN) 1434-601X (eISSN)
Vol. 51 1 1-9 9Ämneskategorier
Subatomär fysik
DOI
10.1140/epja/i2015-15009-0