EPJ Web of Conferences (Jan 2018)

Symmetries in mirror nuclei 31S and 31P

  • Tonev D.,
  • de Angelis G.,
  • Goutev N.,
  • Iliev S.,
  • Orlandi R.,
  • Deloncle I.,
  • Demerdjiev A.,
  • Gadea A.,
  • Geleva E.,
  • He C.,
  • Laftchiev H.,
  • Lunardi S.,
  • Marginean N.,
  • Nikolov A.,
  • Pavlov P.,
  • Pantaleev I.L.,
  • Penttilä H.,
  • Recchia F.,
  • Sahin E.,
  • Singh R.P.,
  • Slavchev B.,
  • Wirth H.–F.,
  • Yavahchova M.S.

DOI
https://doi.org/10.1051/epjconf/201819403001
Journal volume & issue
Vol. 194
p. 03001

Abstract

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Excited states in mirror nuclei 31S and 31P were populated in the 1n and 1p exit channels, respectively, of the reaction 20Ne + 12C. The beam of 20Ne, with an energy of 33 MeV, was delivered for the first time by the Piave-Alpi accelerator of the Laboratori Nazionali di Legnaro. Angular correlations of coincident pairs and Doppler-shift attenuation lifetime measurements in 31S and 31P were performed using the multidetector array GASP in conjunction with the EUCLIDES charged particle detector. A comparison of the determined B(E1) strengths of the analog mirror 7/2- → 5/2+ transitions indicates the presence of a violation of isospin symmetry.