EPJ Web of Conferences 66, 02047 (2014)
https://doi.org/10.1051/epjconf/20146602047

Spectroscopy of ¹⁹³Bi

¹ Department of Physics, University of Jyväskylä, P.O. Box 35, Jyväskylä FI-40014, Finland
² CSNSM , IN2P3-CNRS, F-91405 Orsay Campus, France
³ iThemba Laboratory for Accelerator Based Sciences, P.O. Box 722, 7129 Somerset West, South Africa
⁴ TRIUMF, Westbrook Mall, Vancouver, BC, V6T 2A3, Canada
⁵ European Commission, Joint Research Centre, IRMM, Retieseweg 111, B-2440 Geel, Belgium

^a. e-mail: andrej.a.herzan@jyu.fi

Published online: 20 March 2014

Abstract

An experiment aiming to study the shape coexistence in ¹⁹³Bi has been performed at the Accelerator laboratory of the University of Jyväskylä, Finland (JYFL). Many new states have been found, hugely extending the previously known level scheme of ¹⁹³Bi. The $I^{\pi }={\frac{29}{2}}^{+}$ member of the πi_13/2 band de-excites also to the previously, only tentatively placed long-lived isomeric state. This link determines the energy of the isomeric state to be 2260(1) keV and suggests a spin and parity of $\left({\frac{27}{2}}^{+}\right)$. The half-life of the isomeric state was measured to be 84.4(6) µs. A level structure on top of this isomeric state was constructed. However, transition directly depopulating this state could not be identified. A superdeformed band almost identical to that present in the neighboring isotope ¹⁹¹Bi has been identified.