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

Frankfurt Institute for Advanced Studies

Technische Universität Darmstadt

Helmholtz

F. Aksouh

Helmholtz

Y. Aksyutina

Helmholtz

H. Alvarez-Pol

Universidade de Santiagode Compostela

T. Aumann

Helmholtz

Technische Universität Darmstadt

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

Technical University of Munich

Helmholtz

R. Lemmon

Daresbury Laboratory

Y. A. Litvinov

Helmholtz

K. Mahata

Bhabha Atomic Research Centre

Helmholtz

C. Muntz

Helmholtz

Thomas Nilsson

Chalmers, Fundamental Physics

C. Nociforo

Helmholtz

Göran Hugo Nyman

Chalmers, Fundamental Physics

W. Ott

Helmholtz

V. Panin

Technische Universität Darmstadt

Helmholtz

S. Paschalis

University of Liverpool

Technische Universität Darmstadt

A. Perea

CSIC - Instituto de Estructura de la Materia (IEM)

R. Plag

Goethe University Frankfurt

Helmholtz

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

Frankfurt Institute for Advanced Studies

Helmholtz

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

Goethe University Frankfurt

Helmholtz

Mikhail Zhukov

Chalmers, Fundamental Physics

European Physical Journal A

1434-6001 (ISSN) 1434-601X (eISSN)

Vol. 51 1 1-9

Subject Categories

Subatomic Physics

DOI

10.1140/epja/i2015-15009-0

More information

Latest update

9/15/2020