Coulomb excitation of proton-rich N = 80 isotones at HIE-ISOLDE

Ralph Kern*, Radostina Zidarova, Norbert Pietralla, Georgi Rainovski, Liam P. Gaffney, Andrey Blazhev, Amar Boukhari, Joakim Cederkäll, James G. Cubiss, Martin Djongolov, Christoph Fransen, Kalin Gladnishki, Efstathios Giannopoulos, Herbert Hess, Jan Jolie, Vasil Karayonchev, Levent Kaya, James M. Keatings, Diana Kocheva, Thorsten KröllOliver Möller, George G. O'Neill, Janne Pakarinen, Peter Reiter, Dawid Rosiak, Marcus Scheck, Jacob Snall, Pär-Anders Söderström, Pietro Spagnoletti, Robert Stegmann, Milena Stoyanova, Stefan Thiel, Andreas Vogt, Nigel Warr, Andree Welker, Volker Werner, Johannes Wiederhold, Hilde De Witte

*Corresponding author for this work

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Abstract

A projectile Coulomb-excitation experiment was performed at the radioactive ion beam facility HIE-ISOLDE at CERN. The radioactive 140Nd and 142Sm ions were post accelerated to the energy of 4.62 MeV/A and impinged on a 1.45 mg/cm2-thin 208Pb target. The γ rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL. The scattered charged particles were detected by a double-sided silicon strip detector in forward direction. Experimental γ-ray intensities were used for the determination of electromagnetic transition matrix elements. Preliminary results for the reduced transition strength of the B(M1;2+3 → 2+1) = 0.35(19) μ2N of 140Nd and a first estimation for 142Sm have been deduced using the Coulomb-excitation calculation software GOSIA. The 2+3 states of 140Nd and 142Sm show indications of being the main fragment of the proton-neutron mixed-symmetry 2+1,ms state.
Original languageEnglish
Article number012027
Number of pages8
JournalJournal of Physics: Conference Series
Volume1555
DOIs
Publication statusPublished - 1 May 2020
EventXXIII International School on Nuclear Physics, Neutron Physics and Applications - Varna, Bulgaria
Duration: 22 Sep 201928 Sep 2019

Keywords

  • Coulomb excitation
  • scattered particles
  • Ion beams

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