Studies of continuum states in (16) Ne using three-body correlation techniques
Journal article, 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.
Author
J. Marganiec
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
F. Wamers
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
Frankfurt Institute for Advanced Studies
F. Aksouh
Helmholtz Association of German Research Centres
Y. Aksyutina
Helmholtz Association of German Research Centres
H. Alvarez-Pol
Universidade de Santiagode Compostela
T. Aumann
Technische Universität Darmstadt
Helmholtz Association of German Research Centres
S. Beceiro-Novo
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz Association of German Research Centres
M. J. G. Borge
CERN
Spanish National Research Council (CSIC)
M. Chartier
University of Liverpool
A. Chatillon
Helmholtz Association of German Research Centres
L. V. Chulkov
Helmholtz Association of German Research Centres
National Research Centre "Kurchatov Institute"
D. Cortina-Gil
Universidade de Santiagode Compostela
H. Emling
Helmholtz Association of German Research Centres
O. Ershova
Helmholtz Association of German Research Centres
Goethe University Frankfurt
L.M. Fraile
Complutense University
H. O. U. Fynbo
Aarhus University
D. Galaviz
Spanish National Research Council (CSIC)
H. Geissel
Helmholtz Association of German Research Centres
M. Heil
Helmholtz Association of German Research Centres
D. H. H. Hoffmann
Technische Universität Darmstadt
J. Hoffmann
Helmholtz Association of German Research Centres
Håkan T Johansson
Chalmers, Fundamental Physics
Björn Jonson
Chalmers, Fundamental Physics
C. Karagiannis
Helmholtz Association of German Research Centres
O. A. Kiselev
Helmholtz Association of German Research Centres
J. V. Kratz
Johannes Gutenberg University Mainz
R. Kulessa
Jagiellonian University in Kraków
N. Kurz
Helmholtz Association of German Research Centres
C. Langer
Goethe University Frankfurt
Helmholtz Association of German Research Centres
M. Lantz
Uppsala University
T. Le Bleis
Technical University of Munich
Helmholtz Association of German Research Centres
R. Lemmon
Daresbury Laboratory
Y. A. Litvinov
Helmholtz Association of German Research Centres
K. Mahata
Helmholtz Association of German Research Centres
Bhabha Atomic Research Centre (BARC)
C. Muntz
Helmholtz Association of German Research Centres
Thomas Nilsson
Chalmers, Fundamental Physics
C. Nociforo
Helmholtz Association of German Research Centres
Göran Hugo Nyman
Chalmers, Fundamental Physics
W. Ott
Helmholtz Association of German Research Centres
V. Panin
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
S. Paschalis
Technische Universität Darmstadt
University of Liverpool
A. Perea
Spanish National Research Council (CSIC)
R. Plag
Helmholtz Association of German Research Centres
Goethe University Frankfurt
R. Reifarth
Helmholtz Association of German Research Centres
Goethe University Frankfurt
A. Richter
Technische Universität Darmstadt
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
D. Rossi
Helmholtz Association of German Research Centres
K. Riisager
Aarhus University
D. Savran
Helmholtz Association of German Research Centres
Frankfurt Institute for Advanced Studies
G. Schrieder
Technische Universität Darmstadt
H. Simon
Helmholtz Association of German Research Centres
J. Stroth
Goethe University Frankfurt
K. Summerer
Helmholtz Association of German Research Centres
O. Tengblad
Spanish National Research Council (CSIC)
H. Weick
Helmholtz Association of German Research Centres
M. Wiescher
University of Notre Dame
C. Wimmer
Goethe University Frankfurt
Helmholtz Association of German Research Centres
Mikhail Zhukov
Chalmers, Fundamental Physics
European Physical Journal A
1434-6001 (ISSN) 1434-601X (eISSN)
Vol. 51 1 1-9 9Subject Categories (SSIF 2011)
Subatomic Physics
DOI
10.1140/epja/i2015-15009-0