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

GSI Helmholtz Centre for Heavy Ion Research GmbH

Technische Universität Darmstadt

F. Wamers

GSI Helmholtz Centre for Heavy Ion Research GmbH

Technische Universität Darmstadt

Frankfurt Institute for Advanced Studies

F. Aksouh

GSI Helmholtz Centre for Heavy Ion Research GmbH

Y. Aksyutina

GSI Helmholtz Centre for Heavy Ion Research GmbH

H. Alvarez-Pol

Universidade de Santiagode Compostela

T. Aumann

Technische Universität Darmstadt

GSI Helmholtz Centre for Heavy Ion Research GmbH

S. Beceiro-Novo

Universidade de Santiagode Compostela

K. Boretzky

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. J. G. Borge

European Organization for Nuclear Research

CSIC - Instituto de Estructura de la Materia (IEM)

M. Chartier

University of Liverpool

A. Chatillon

GSI Helmholtz Centre for Heavy Ion Research GmbH

L. V. Chulkov

National Research Centre "Kurchatov Institute"

GSI Helmholtz Centre for Heavy Ion Research GmbH

D. Cortina-Gil

Universidade de Santiagode Compostela

H. Emling

GSI Helmholtz Centre for Heavy Ion Research GmbH

O. Ershova

GSI Helmholtz Centre for Heavy Ion Research GmbH

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

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Heil

GSI Helmholtz Centre for Heavy Ion Research GmbH

D. H. H. Hoffmann

Technische Universität Darmstadt

J. Hoffmann

GSI Helmholtz Centre for Heavy Ion Research GmbH

Håkan T Johansson

Chalmers, Fundamental fysik

Björn Jonson

Chalmers, Fundamental fysik

C. Karagiannis

GSI Helmholtz Centre for Heavy Ion Research GmbH

O. A. Kiselev

GSI Helmholtz Centre for Heavy Ion Research GmbH

J. V. Kratz

Johannes Gutenberg-Universität Mainz

R. Kulessa

Uniwersytet Jagiellonski w Krakowie

N. Kurz

GSI Helmholtz Centre for Heavy Ion Research GmbH

C. Langer

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johann Wolfgang Goethe Universität Frankfurt am Main

M. Lantz

Uppsala universitet

T. Le Bleis

Technische Universität München

GSI Helmholtz Centre for Heavy Ion Research GmbH

R. Lemmon

Daresbury Laboratory

Y. A. Litvinov

GSI Helmholtz Centre for Heavy Ion Research GmbH

K. Mahata

Bhabha Atomic Research Centre

GSI Helmholtz Centre for Heavy Ion Research GmbH

C. Muntz

GSI Helmholtz Centre for Heavy Ion Research GmbH

Thomas Nilsson

Chalmers, Fundamental fysik

C. Nociforo

GSI Helmholtz Centre for Heavy Ion Research GmbH

Göran Hugo Nyman

Chalmers, Fundamental fysik

W. Ott

GSI Helmholtz Centre for Heavy Ion Research GmbH

V. Panin

GSI Helmholtz Centre for Heavy Ion Research GmbH

Technische Universität Darmstadt

S. Paschalis

Technische Universität Darmstadt

University of Liverpool

A. Perea

CSIC - Instituto de Estructura de la Materia (IEM)

R. Plag

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johann Wolfgang Goethe Universität Frankfurt am Main

R. Reifarth

Johann Wolfgang Goethe Universität Frankfurt am Main

GSI Helmholtz Centre for Heavy Ion Research GmbH

A. Richter

Technische Universität Darmstadt

C. Rodriguez-Tajes

Universidade de Santiagode Compostela

D. Rossi

GSI Helmholtz Centre for Heavy Ion Research GmbH

K. Riisager

Aarhus Universitet

D. Savran

GSI Helmholtz Centre for Heavy Ion Research GmbH

Frankfurt Institute for Advanced Studies

G. Schrieder

Technische Universität Darmstadt

H. Simon

GSI Helmholtz Centre for Heavy Ion Research GmbH

J. Stroth

Johann Wolfgang Goethe Universität Frankfurt am Main

K. Summerer

GSI Helmholtz Centre for Heavy Ion Research GmbH

O. Tengblad

CSIC - Instituto de Estructura de la Materia (IEM)

H. Weick

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Wiescher

University of Notre Dame

C. Wimmer

Johann Wolfgang Goethe Universität Frankfurt am Main

GSI Helmholtz Centre for Heavy Ion Research GmbH

Mikhail Zhukov

Chalmers, Fundamental fysik

European Physical Journal A

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

Vol. 51 1-9

Ämneskategorier

Subatomär fysik

DOI

10.1140/epja/i2015-15009-0