https://doi.org/10.1140/epja/i2015-15031-2
Regular Article - Experimental Physics
First observation of superdeformed states in 191Bi
1
Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014, Jyväskylä, Finland
2
School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, M13 9PL, Manchester, UK
* e-mail: markus.e.j.nyman@gmail.com
Received:
20
October
2014
Revised:
27
January
2015
Accepted:
16
February
2015
Published online:
23
March
2015
Prompt 
-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 
Nilsson orbital. This is the lightest Bi isotope where superdeformation has been observed. The two previously observed oblate strongly coupled bands feeding the isomeric 
state and the 
ground state were extended to higher spins. The bands built on the 
intruder state were investigated in detail, showing signs of a more deformed prolate or triaxial shape in 191Bi compared to 193Bi .
Present address: Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440, Geel, Belgium
Present address: International Atomic Energy Agency, Vienna International Centre, A-1400, Vienna, Austria
Present address: iThemba LABS, National Research Foundation, P.O. Box 722, 7129, Somerset West, South Africa
© SIF, Springer-Verlag Berlin Heidelberg, 2015
