EPJ Web of Conferences (Jan 2016)

Search for mixed-symmetry states of nuclei in the vicinity of the double-magic nucleus 208Pb

  • Kocheva D.,
  • Stegmann R.,
  • Rainovski G.,
  • Jolie J.,
  • Pietralla N.,
  • Stahl C.,
  • Petkov P.,
  • Blazhev A.,
  • Hennig A.,
  • Bauer C.,
  • Braunroth Th.,
  • Carpenter M.P.,
  • Cortes L.,
  • Dewald A.,
  • Djongolov M.,
  • Fransen C.,
  • Gladnishki K.,
  • Janssens R.V.F.,
  • Karayonchev V.,
  • Lettmann M.,
  • Lister C.J.,
  • Litzinger J.,
  • Möller Th.,
  • Möller-Gatermann C.,
  • Scheck M.,
  • Scholz Ph.,
  • Schramm C.,
  • Thöle P.,
  • Werner V.,
  • Wölk D.,
  • Zhu S.,
  • Van Isacker P.

DOI
https://doi.org/10.1051/epjconf/201610703004
Journal volume & issue
Vol. 107
p. 03004

Abstract

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In this work we present the results from two experiments dedicated to search for quadrupolecollective isovector valence-shell excitation, the states with so-called mixed proton-neutron symmetry (MSS), in nuclei around the doubly magic nucleus 208Pb. 212Po was studied in an α-transfer reaction. 204Hg was studied in an inverse kinematics Coulomb excitation reaction on a carbon target. Both experiments provide indications for existence of one-phonon MSSs. Those are the first experimentally identified MSSs in the mass A ≈ 208 region.