Systematics of low-lying dipole excitations in the deformed even-even nuclei Er164,166,168,170

H. Maser, S. Lindenstruth, I. Bauske, O. Beck, P. von Brentano, T. Eckert, H. Friedrichs, R. D. Heil, R.-D. Herzberg, A. Jung, U. Kneissl, J. Margraf, N. Pietralla, H. H. Pitz, C. Wesselborg, and A. Zilges
Phys. Rev. C 53, 2749 – Published 1 June 1996
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Abstract

Photon scattering experiments on the deformed even-even nuclei Er164,166,168,170 provided detailed information on the excitation energies, spins, transition probabilities, and K quantum numbers of low-lying dipole excitations. In the case of Er168, in addition, parities of the excited states were determined model independently by measuring the linear polarization of the scattered photons using a sectored Ge-Compton polarimeter with a BGO–anti-Compton shield. The results for M1 excitations are compared with the systematics of low-lying orbital M1 strength (‘‘scissors mode’’) in the neighboring rare-earth nuclei. The observed enhanced E1 transitions are discussed in terms of collective excitations (K=0 octupole bandheads or candidates for 2+3 two-phonon excitations) and in the framework of recent microscopic quasiparticle phonon model calculations. © 1996 The American Physical Society.

  • Received 21 November 1995

DOI:https://doi.org/10.1103/PhysRevC.53.2749

©1996 American Physical Society

Authors & Affiliations

H. Maser, S. Lindenstruth, I. Bauske, O. Beck, P. von Brentano, T. Eckert, H. Friedrichs, R. D. Heil, R.-D. Herzberg, A. Jung, U. Kneissl, J. Margraf, N. Pietralla, H. H. Pitz, C. Wesselborg, and A. Zilges

  • Institut für Strahlenphysik, Universität Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany
  • Institut für Kernphysik, Justus-Liebig-Universität Giessen, Leihgesterner Weg 217, D-35392 Giessen, Germany
  • Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany

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Issue

Vol. 53, Iss. 6 — June 1996

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