Ultrahigh resolution study of collective modes in 158Gd

H. G. Börner, M. Jentschel, N. V. Zamfir, R. F. Casten, M. Krticka, and W. Andrejtscheff
Phys. Rev. C 59, 2432 – Published 1 May 1999
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Abstract

Ultraprecise energies and absolute B(E2) values associated with K=0+ excitations in 158Gd, measured with the GRID technique, reveal significant information relating to the possible existence or absence of two-phonon vibrational excitations in deformed nuclei. A strong B(E2:K=02+γ) is observed but reflects band mixing rather than a γγ mode. For the K=03+ band, measurement of precise γ transition energies shows that suggested existing placements of strong deexcitation transitions are incorrect and that there is, again, no evidence for γγ-phonon character in this band either. A weak B(E1:K=1K=01+) value is interpreted in terms of the microscopic structure of K=0 and K=1 excitations.

  • Received 13 November 1998

DOI:https://doi.org/10.1103/PhysRevC.59.2432

©1999 American Physical Society

Authors & Affiliations

H. G. Börner1, M. Jentschel1, N. V. Zamfir2,3, R. F. Casten2, M. Krticka4, and W. Andrejtscheff5

  • 1Institut Laue-Langevin, F-38042 Grenoble, France
  • 2Wright Nuclear Structure Laboratory (WNSL), Yale University, New Haven, Connecticut 06520
  • 3Clark University, Worcester, Massachusetts 01610
  • 4Charles University, CZ-18000 Prague, Czech Republic
  • 5Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria

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Vol. 59, Iss. 5 — May 1999

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