Neutron excitations and interactions above the N=80 superdeformed closed shell: Superdeformation in 144Eu

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ID: 272817
1997
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Abstract
Three superdeformed bands have been observed in the nucleus ${}^{144}$Eu with the GAMMASPHERE spectrometer in its early implementation phase. The reaction used was ${}^{122}$Sn${(}^{27}$Al,5${n)}^{144}$Eu at a beam energy of 142 MeV. All three bands are identified as single-neutron excitations with respect to ${}^{143}$Eu. One band is a confirmation of a previously suggested candidate. It is assigned as the yrast sequence based on the $\ensuremath{\pi}{6}^{1}\ensuremath{\nu}{7}^{1}$ configuration, and is believed to undergo an interaction with the $\ensuremath{\nu}$[514]9/2${}^{\ensuremath{-}}$ orbital. The other two bands are assigned as signature partners based on the $\ensuremath{\pi}{6}^{1}\ensuremath{\nu}{6\mathrm{\ifmmode \tilde{}\else \~{}\fi{}}}^{1}$ configuration, where $6\mathrm{\ifmmode \tilde{}\else \~{}\fi{}}$ corresponds to a mixed [651]1/2${}^{+}$/ [642]5/2${}^{+}$ state. The partner that contains the $\ensuremath{\alpha}$=-1/2 signature component of the $6\mathrm{\ifmmode \tilde{}\else \~{}\fi{}}$ orbital is identified from a band crossing that occurs in related bands in ${}^{145}$Gd and ${}^{146}$Gd. Alignment plots suggest that the interaction strength becomes stronger as the mass number increases.
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hackman1997physicalneutron Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors G. Hackman;S. M. Mullins;D. Haslip;S. Flibotte;J. A. Kuehner;J. C. Waddington;R. M. Clark;S. Pilotte;
Journal physical review c
Year 1997
DOI
doi:10.1103/PhysRevC.55.1101
URL
https://doi.org/10.1103/physrevc.55.1101
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