Proton-neutron structure of the effective quadrupole-octupole coupled E1 transition operator

N. Pietralla, C. Fransen, A. Gade, N. A. Smirnova, P. Von Brentano, V. Werner, S. W. Yates

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Electric dipole transitions between 31- octupole-phonon states, one-phonon 21,ms+ mixed-symmetry states of 92Zr, 94Mo, 96Ru, and 142Ce are observed, provide the first evidence for F-vector E1 transitions in nuclei. For effective boson models of the nuclear valence shell, F spin is the analog of isospin in the shell model. The 31 -→ 21,ms+ E1 transitions are stronger than those of the 21+ state. The effective E1 operator in the sdf-interacting boson model-2 is concluded to have F-vector character, in analogy with the well-known isovector character of the E1 operator in microscopic models.

Original languageEnglish
Article number031305
Pages (from-to)313051-313055
Number of pages5
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - Sep 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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