Photo-response of the N= Z nucleus 24 Mg

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • J. Deary - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • M. Scheck - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • R. Schwengner - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • D. O’Donnell - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • D. Bemmerer - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • R. Beyer - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Th Hensel - , Helmholtz-Zentrum Dresden-Rossendorf, Technische Universität Dresden (Autor:in)
  • A. R. Junghans - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • T. Kögler - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • S. E. Müller - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • K. Römer - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • K. Schmidt - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • S. Turkat - , Professur für Kernphysik, Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • S. Urlaß - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • A. Wagner - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • M. Bowry - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • P. Adsley - , University of the Witwatersrand, iThemba Laboratory for Accelerator Based Sciences (Autor:in)
  • O. Agar - , University of the West of Scotland, Scottish Universities Physics Alliance, Karamanoglu Mehmetbey University (Autor:in)
  • R. Chapman - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • F. C.L. Crespi - , National Institute for Nuclear Physics, Università degli Studi di Milano (Autor:in)
  • D. T. Doherty - , University of Surrey (Autor:in)
  • U. Friman Gayer - , Triangle Universities Nuclear Laboratory, University of North Carolina at Chapel Hill (Autor:in)
  • R. D. Herzberg - , University of Liverpool (UOL) (Autor:in)
  • J. Isaak - , Technische Universität Darmstadt (Autor:in)
  • R. V.F. Janssens - , Triangle Universities Nuclear Laboratory, University of North Carolina at Chapel Hill (Autor:in)
  • T. Kröll - , Technische Universität Darmstadt (Autor:in)
  • B. Löher - , GSI Helmholtzzentrum für Schwerionenforschung (Autor:in)
  • B. S. Nara Singh - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • P. von Neumann-Cosel - , Technische Universität Darmstadt (Autor:in)
  • L. Pellegri - , University of the Witwatersrand, iThemba Laboratory for Accelerator Based Sciences (Autor:in)
  • E. E. Peters - , University of Kentucky (Autor:in)
  • G. Rainovski - , Sofia University St. Kliment Ohridski (Autor:in)
  • D. Savran - , GSI Helmholtzzentrum für Schwerionenforschung (Autor:in)
  • J. F. Smith - , University of the West of Scotland, Scottish Universities Physics Alliance (Autor:in)
  • M. Spieker - , Florida State University (Autor:in)
  • P. G. Thirolf - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • S. Triambak - , University of the Western Cape (Autor:in)
  • W. Tornow - , Triangle Universities Nuclear Laboratory, Duke University (Autor:in)
  • M. Venhart - , Slovak Academy of Sciences (Autor:in)
  • M. Wiedeking - , University of the Witwatersrand, iThemba Laboratory for Accelerator Based Sciences (Autor:in)
  • O. Wieland - , National Institute for Nuclear Physics (Autor:in)
  • S. W. Yates - , University of Kentucky (Autor:in)
  • A. Zilges - , Universität zu Köln (Autor:in)

Abstract

The electric E1 and magnetic M1 dipole responses of the N= Z nucleus 24 Mg were investigated in an inelastic photon scattering experiment. The 13.0 MeV electrons, which were used to produce the unpolarised bremsstrahlung in the entrance channel of the 24 Mg(γ, γ) reaction, were delivered by the ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf. The collimated bremsstrahlung photons excited one Jπ= 1 - , four Jπ= 1 + , and six Jπ= 2 + states in 24 Mg. De-excitation γ rays were detected using the four high-purity germanium detectors of the γ ELBE setup, which is dedicated to nuclear resonance fluorescence experiments. In the energy region up to 13.0 MeV a total B(M1)↑=2.7(3)μN2 is observed, but this N= Z nucleus exhibits only marginal E1 strength of less than ∑ B(E1) ↑ ≤ 0.61 × 10 - 3 e 2 fm 2 . The B(Π1,1iπ→21+)/B(Π1,1iπ→0gs+) branching ratios in combination with the expected results from the Alaga rules demonstrate that K is a good approximative quantum number for 24 Mg. The use of the known ρ2(E0,02+→0gs+) strength and the measured B(M1,1+→02+)/B(M1,1+→0gs+) branching ratio of the 10.712 MeV 1 + level allows, in a two-state mixing model, an extraction of the difference Δβ22 between the prolate ground-state structure and shape-coexisting superdeformed structure built upon the 6432-keV 02+ level.

Details

OriginalspracheEnglisch
Aufsatznummer198
FachzeitschriftEuropean Physical Journal A
Jahrgang59
Ausgabenummer9
PublikationsstatusVeröffentlicht - Sept. 2023
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0002-0509-8743/work/149081864

Schlagworte

ASJC Scopus Sachgebiete