Abstract.
Prompt \( \gamma\) -rays from 191Bi have been studied by means of the recoil-decay-tagging technique. Two superdeformed rotational bands have been observed and interpreted as signature partners originating from the \( 1/2[651]\) Nilsson orbital. This is the lightest Bi isotope where superdeformation has been observed. The two previously observed oblate strongly coupled bands feeding the isomeric \( 13/2^{+}\) state and the \( 9/2^{-}\) ground state were extended to higher spins. The bands built on the \( 1/2^{+}\) intruder state were investigated in detail, showing signs of a more deformed prolate or triaxial shape in 191Bi compared to 193Bi .
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Nyman, M., Juutinen, S., Cullen, D. et al. First observation of superdeformed states in 191Bi. Eur. Phys. J. A 51, 31 (2015). https://doi.org/10.1140/epja/i2015-15031-2
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DOI: https://doi.org/10.1140/epja/i2015-15031-2