Measurement of the dipole polarizability of the unstable neutron-rich nucleus Ni68
Artikel i vetenskaplig tidskrift, 2013

The E1 strength distribution in Ni68 has been investigated using Coulomb excitation in inverse kinematics at the RB3-LAND setup and by measuring the invariant mass in the one- and two-neutron decay channels. The giant dipole resonance and a low-lying peak (pygmy dipole resonance) have been observed at 17.1(2) and 9.55(17) MeV, respectively. The measured dipole polarizability is compared to relativistic random phase approximation calculations yielding a neutron-skin thickness of 0.17(2) fm. A method and analysis applicable to neutron-rich nuclei has been developed, allowing for a precise determination of neutron skins in nuclei as a function of neutron excess.

Författare

D. Rossi

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johannes Gutenberg-Universität Mainz

P. Adrich

GSI Helmholtz Centre for Heavy Ion Research GmbH

F. Aksouh

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

J. Benlliure

Universidade de Santiagode Compostela

M. Böhmer

Technische Universität München

K. Boretzky

GSI Helmholtz Centre for Heavy Ion Research GmbH

E. Casarejos

Universidad de Vigo

M. Chartier

University of Liverpool

A. Chatillon

GSI Helmholtz Centre for Heavy Ion Research GmbH

D. Cortina-Gil

Universidade de Santiagode Compostela

U. Datta Pramanik

Saha Institute of Nuclear Physics

H. Emling

GSI Helmholtz Centre for Heavy Ion Research GmbH

O.V. Ershova

Johann Wolfgang Goethe Universität Frankfurt am Main

B. Fernandez-Dominguez

University of Liverpool

Universidade de Santiagode Compostela

H. Geissel

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Górska

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Heil

GSI Helmholtz Centre for Heavy Ion Research GmbH

Håkan T Johansson

Chalmers, Teknisk fysik, Subatomär fysik

A.R. Junghans

Helmholtz-Zentrum Dresden-Rossendorf

A. Kelic-Heil

GSI Helmholtz Centre for Heavy Ion Research GmbH

O.A. Kiselev

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johannes Gutenberg-Universität Mainz

A. Klimkiewicz

Uniwersytet Jagiellonski w Krakowie

GSI Helmholtz Centre for Heavy Ion Research GmbH

J.V. Kratz

Johannes Gutenberg-Universität Mainz

R. Krücken

Technische Universität München

N. Kurz

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Labiche

Daresbury Laboratory

University of the West of Scotland

T. Le Bleis

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johann Wolfgang Goethe Universität Frankfurt am Main

Institut Pluridisciplinaire Hubert Curien

R.C. 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

P. Maierbeck

Technische Universität München

A. Movsesyan

Technische Universität Darmstadt

Thomas Nilsson

Chalmers, Teknisk fysik, Subatomär fysik

C. Nociforo

GSI Helmholtz Centre for Heavy Ion Research GmbH

R. Palit

Tata Institute of Fundamental Research

S. Paschalis

Technische Universität Darmstadt

University of Liverpool

R. Plag

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johann Wolfgang Goethe Universität Frankfurt am Main

R. Reifarth

GSI Helmholtz Centre for Heavy Ion Research GmbH

Johann Wolfgang Goethe Universität Frankfurt am Main

D. Savran

GSI Helmholtz Centre for Heavy Ion Research GmbH

Frankfurt Institute for Advanced Studies

H. Scheit

Technische Universität Darmstadt

H. Simon

GSI Helmholtz Centre for Heavy Ion Research GmbH

K. Sümmerer

GSI Helmholtz Centre for Heavy Ion Research GmbH

A. Wagner

Helmholtz-Zentrum Dresden-Rossendorf

W. Walua

Uniwersytet Jagiellonski w Krakowie

H. Weick

GSI Helmholtz Centre for Heavy Ion Research GmbH

M. Winkler

GSI Helmholtz Centre for Heavy Ion Research GmbH

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 111 242503

Ämneskategorier

Subatomär fysik

Fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevLett.111.242503