Restoring the valence-shell stabilization in 140Nd

R. Kern*, R. Zidarova, N. Pietralla, G. Rainovski, R. Stegmann, A. Blazhev, A. Boukhari, J. Cederkäll, J. G. Cubiss, M. Djongolov, C. Fransen, L. P. Gaffney, K. Gladnishki, E. Giannopoulos, H. Hess, J. Jolie, V. Karayonchev, L. Kaya, J. M. Keatings, D. KochevaTh. Kröll, O. Möller, G. G. O'Neill, J. Pakarinen, P. Reiter, D. Rosiak, M. Scheck, J. Snall, P.-A. Söderström, P. Spagnoletti, M. Stoyanova, S. Thiel, A. Vogt, N. Warr, A. Welker, V. Werner, J. Wiederhold, H. 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 to obtain E2 and M1 transition matrix elements of 140Nd using the multistep Coulomb-excitation code GOSIA. The absolute M1 strengths, B(M1; 2+2 → 2+1) = 0.033(8) µ2N,B(M1; 2+3 → 2+1) = 0.26+0.11−µ2N, and B(M1; 2+4 → 2+1) < 0.04 µ2N, identify the 2+3 state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state of 140Nd. The degree of F-spin mixing in 140Nd was quantified with the determination of the mixing matrix element VF−mix < 7+13−7 keV.
Original languageEnglish
Article number041304(R)
Number of pages6
JournalPhysical Review C
Volume102
Issue number4
DOIs
Publication statusPublished - 16 Oct 2020

Keywords

  • Coulomb-excitation
  • radioactive-ion beam
  • CERN

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