First direct observation of isomeric decay in neutron-rich odd-odd $^{186}$Ta
| Autor: | Jun Young Moon, F. G. Kondev, J. H. Park, M. Oyaizu, G. J. Lane, Hirofumi Watanabe, Y. X. Watanabe, Marco Rosenbusch, Satoshi Kimura, Yu. A. Litvinov, Peter Schury, T. Hashimoto, M. Mukai, Yoshikazu Hirayama, Michiharu Wada, M. Ahmed, Hiroari Miyatake, S. Ishizawa, T. Niwase, M. Brunet, P. M. Walker, Zs. Podolyák |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Decay scheme Energetic neutral atom 010308 nuclear & particles physics FOS: Physical sciences State (functional analysis) Coupling (probability) 7. Clean energy 01 natural sciences Isotope separation law.invention Atomic orbital law 0103 physical sciences Physics::Atomic and Molecular Clusters Neutron Atomic physics Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Storage ring |
| Zdroj: | Physical Review C |
| Popis: | Deexcitation $\ensuremath{\gamma}$ rays associated with an isomeric state of $^{186}\mathrm{Ta}$ were investigated. The isomers were produced in multinucleon transfer reactions between a $^{136}\mathrm{Xe}$ beam and a natural W target and were collected and separated by the KEK Isotope Separation System. Two $\ensuremath{\gamma}$ transitions with energies of 161.1(2) and 186.8(1) keV associated with an isomeric decay were observed for the first time. The half-life of the isomeric state of the neutral atom $^{186\mathrm{m}}\mathrm{Ta}$ was deduced as 17(2) s. Based on the comparison with the previous measurements of the isomeric state using the Experimental Storage Ring at GSI Darmstadt and the coupling of angular momenta of individual particle orbitals in odd-odd nuclei, a decay scheme of $^{186\mathrm{m}}\mathrm{Ta}$ was proposed. |
| Databáze: | OpenAIRE |
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