Doubly Magic NucleusHs162108270
| Autor: | Alexander Yakushev, J. Dvorak, V. Gorshkov, Ch. E. Düllmann, M. L. Chelnokov, B. Schausten, Y. Nagame, W. Brüchle, Klaus Eberhardt, E. Schimpf, A. V. Yeremin, Z. H. Qin, P. Thörle, Egon Jäger, F. Nebel, R. Krücken, A. Semchenkov, M. Wegrzecki, Z. Novackova, B. Wierczinski, Rugard Dressler, A. A. Kuznetsov, Matthias Schädel, Andreas Türler |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 97 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | Theoretical calculations predict $^{270}\mathrm{Hs}$ ($Z=108$, $N=162$) to be a doubly magic deformed nucleus, decaying mainly by $\ensuremath{\alpha}$-particle emission. In this work, based on a rapid chemical isolation of Hs isotopes produced in the $^{26}\mathrm{Mg}+^{248}\mathrm{Cm}$ reaction, we observed 15 genetically linked nuclear decay chains. Four chains were attributed to the new nuclide $^{270}\mathrm{Hs}$, which decays by $\ensuremath{\alpha}$-particle emission with ${Q}_{\ensuremath{\alpha}}=9.02\ifmmode\pm\else\textpm\fi{}0.03\text{ }\text{ }\mathrm{MeV}$ to $^{266}\mathrm{Sg}$ which undergoes spontaneous fission with a half-life of ${444}_{\ensuremath{-}148}^{+444}\text{ }\text{ }\mathrm{ms}$. A production cross section of about 3 pb was measured for $^{270}\mathrm{Hs}$. Thus, $^{270}\mathrm{Hs}$ is the first nucleus for which experimental nuclear decay properties have become available for comparison with theoretical predictions of the $N=162$ shell stability. |
| Databáze: | OpenAIRE |
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