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High spin structure of 155Dy

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Published: Dec 5, 2019
DOI: https://doi.org/10.12681/hnps.2378
C. T. Papadopoulos
National Technical University of Athens
R. Vlastou
National Technical University of Athens
M. Serris
National Technical University of Athens
C. A. Kalfas
Institute of Nuclear Physics, NCSR"Democritos"
N. Fotiades
Institute of Nuclear Physics, NCSR"Democritos"
S. Harissopulos
Institute of Nuclear Physics, NCSR"Democritos"
S. Kosslonides
Institute of Nuclear Physics, NCSR"Democritos"
M. A. Rilley
Oliver Lodge Laboratory, University of Liverpool; Department of Physics, Florida State University
J. Simpson
Oliver Lodge Laboratory, University of Liverpool; SERC, Daresbury Laboratory
E. S. Paul
Oliver Lodge Laboratory, University of Liverpool
J. F. Sharpey-Schafer
Oliver Lodge Laboratory, University of Liverpool
Abstract

High spin states in 155Dy have been studied by γ-γ coincidence measurements via the 124Sn(36S, 5n)155Dy reaction at a beam energy of 155 MeV. Eight rotational bands have been populated and observed up to high spin (I<91/2).The band features have been analysed within the framework of the cranked shell model. The Ì13/2 neutron alignments and the h11/2 proton alignments are discussed. B(M1)/B(E2) ratios have also been extracted for the strongly coupled bands to deduce further information on the detailed structure of these bands. For the highest states (above spin 30) of the negative parity bands an irregularity in y-ray energies appears which is discussed in terms of band termination.

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