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
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
Goethe University Frankfurt
L.M. Fraile
Complutense University
H. O. U. Fynbo
Aarhus University
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 Physics
Björn Jonson
Chalmers, Fundamental Physics
C. Karagiannis
Helmholtz
O. A. Kiselev
Helmholtz
J. V. Kratz
Johannes Gutenberg University Mainz
R. Kulessa
Jagiellonian University in Kraków
N. Kurz
Helmholtz
C. Langer
Helmholtz
Goethe University Frankfurt
M. Lantz
Uppsala University
T. Le Bleis
Helmholtz
Technical University of Munich
R. Lemmon
Daresbury Laboratory
Y. A. Litvinov
Helmholtz
K. Mahata
Helmholtz
Bhabha Atomic Research Centre (BARC)
C. Muntz
Helmholtz
Thomas Nilsson
Chalmers, Fundamental Physics
C. Nociforo
Helmholtz
Göran Hugo Nyman
Chalmers, Fundamental Physics
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
Goethe University Frankfurt
R. Reifarth
Helmholtz
Goethe University Frankfurt
A. Richter
Technische Universität Darmstadt
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
D. Rossi
Helmholtz
K. Riisager
Aarhus University
D. Savran
Helmholtz
Frankfurt Institute for Advanced Studies
G. Schrieder
Technische Universität Darmstadt
H. Simon
Helmholtz
J. Stroth
Goethe University Frankfurt
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
Goethe University Frankfurt
Mikhail Zhukov
Chalmers, Fundamental Physics
European Physical Journal A
1434-6001 (ISSN) 1434-601X (eISSN)
Vol. 51 1 1-9 9Subject Categories
Subatomic Physics
DOI
10.1140/epja/i2015-15009-0