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Joakim

Joakim Cederkäll

Professor

Joakim

Coulomb excitation of Mg-31

Author

  • M. Seidlitz
  • D. Muecher
  • P. Reiter
  • V. Bildstein
  • A. Blazhev
  • N. Bree
  • B. Bruyneel
  • Joakim Cederkäll
  • E. Clement
  • T. Davinson
  • P. Van Duppen
  • Andreas Ekström
  • F. Finke
  • L. M. Fraile
  • K. Geibel
  • R. Gernhaeuser
  • H. Hess
  • A. Holler
  • M. Huyse
  • O. Ivanov
  • J. Jolie
  • M. Kalkuehler
  • T. Kotthaus
  • R. Kruecken
  • R. Lutter
  • E. Piselli
  • H. Scheit
  • I. Stefanescu
  • J. Van de Walle
  • D. Voulot
  • N. Warr
  • F. Wenander
  • A. Wiens
Show all

Summary, in English

The ground state properties of Mg-31 indicate a change of nuclear shape at N = 19 with a deformed J(pi) = 1/2(+) intruder state as a ground state, implying that Mg-31 is part of the "island of inversion". The collective properties of excited states were the subject of a Coulomb excitation experiment at REX-ISOLDE, CERN, employing a radioactive Mg-31 beam. De-excitation gamma-rays were detected by the MINIBALL gamma-spectrometer in coincidence with scattered particles in a segmented Si-detector. The level scheme of Mg-3I was extended. Spin and parity assignment of the 945 keV state yielded 5/2(+) and its de-excitation is dominated by a strong collective M1 transition. Comparison of the transition probabilities of Mg-30,Mg-31,Mg-32 establishes that for the N = 19 magnesium isotope not only the ground state but also excited states are largely dominated by a deformed pf intruder configuration. (C) 2011 Elsevier B.V. All rights reserved.

Department/s

  • Nuclear physics

Publishing year

2011

Language

English

Pages

181-186

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

700

Issue

3-4

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Keywords

  • Coulomb excitation
  • ISOL
  • Reduced transition matrix element
  • Island of
  • inversion

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693