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

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

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

Technische Universität München

Helmholtz

R. Lemmon

Daresbury Laboratory

Y. A. Litvinov

Helmholtz

K. Mahata

Bhabha Atomic Research Centre

Helmholtz

C. Muntz

Helmholtz

Thomas Nilsson

Chalmers, Fundamental fysik

C. Nociforo

Helmholtz

Göran Hugo Nyman

Chalmers, Fundamental fysik

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

Johann Wolfgang Goethe Universität Frankfurt am Main

Helmholtz

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

Frankfurt Institute for Advanced Studies

Helmholtz

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

Johann Wolfgang Goethe Universität Frankfurt am Main

Helmholtz

Mikhail Zhukov

Chalmers, Fundamental fysik

European Physical Journal A

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

Vol. 51 1 1-9

Ämneskategorier

Subatomär fysik

DOI

10.1140/epja/i2015-15009-0

Mer information

Senast uppdaterat

2020-09-15