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Detailed spectroscopy of Bi 193
Vise andre og tillknytning
2015 (engelsk)Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, nr 4Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

An experiment aiming to study shape coexistence in Bi193 has been performed. Due to its transitional character, it has an exceptionally large number of structures identified close to the yrast line. Many new states have been found, significantly extending the previously known level scheme of Bi193, including several new rotational bands. The πi13/2 band was extended to Iπ=45/2+. The Iπ=31/2+ member of the πi13/2 band was found to de-excite also to a long-lived isomeric state. This isomeric state is located at 2350 keV and has a spin and parity of 29/2+. The half-life of the isomeric state was measured to be 85(3) μs and it decays via the emission of an 84 keV E2 transition. A level structure feeding this isomeric state was constructed. A low-energy, 49 keV transition has been identified to depopulate the (29/2-) isomeric state, which places it at an energy 2405 keV in the level scheme. This is the first time such a decay has been observed in the neutron-deficient Bi isotopes. A superdeformed band almost identical to that present in the neighboring isotope Bi191, based on the 1/2[651] Nilsson orbital, has also been identified.

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2015. Vol. 92, nr 4
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URN: urn:nbn:se:kth:diva-181987DOI: 10.1103/PhysRevC.92.044310ISI: 000362897900002Scopus ID: 2-s2.0-84945232541OAI: oai:DiVA.org:kth-181987DiVA, id: diva2:903205
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QC 20160215

Tilgjengelig fra: 2016-02-15 Laget: 2016-02-11 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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