Fermi superallowedβ+decays andT=1ground states of heavy odd-oddN=Znuclei
| Autor: | J. Giovinazzo, Ch. Miehé, J. Garcés Narro, S. Czajkowski, W. Gelletly, K. L. Jones, A.T. Reed, Alison Bruce, Robert Grzywacz, Duncan Appelbe, B. J. Greenhalgh, W. N. Catford, Leif Axelsson, J. M. Daugas, L. Frankland, D. M. Cullen, Marie K. Harder, R. M. Clark, C. Longour, O. Sorlin, B. Blank, M. Lewitowicz, C. J. Pearson, N. S. Kelsall, P. H. Regan, T. Kszczot, A. Fleury, C. Chandler, R. D. Page, R. Wadsworth, P. Dessagne |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Physical Review C. 63 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.63.044307 |
| Popis: | The ${\ensuremath{\beta}}^{+}$-decay half-lives of the neutron-deficient odd-odd $N=Z$ nuclei ${}^{74}\mathrm{Rb},$ ${}^{78}\mathrm{Y},$ ${}^{82}\mathrm{Nb},$ and ${}^{86}\mathrm{Tc}$ have been measured following the fragmentation of a primary ${}^{92}\mathrm{Mo}$ beam at an energy of 60 MeV per nucleon at the GANIL laboratory, France. This was achieved by correlating ${\ensuremath{\beta}}^{+}$ decays with the implantation of unambiguously identified fragments at the final focus of the LISE3 separator. The deduced ${\mathrm{log}}_{10}{\mathrm{ft}}_{1/2}$ values are consistent with ${0}^{+}\ensuremath{\rightarrow}{0}^{+},$ Fermi superallowed transitions, which together with the measured ${\ensuremath{\beta}}^{+}$-detection efficiencies, suggest $T=1,$ ${I}^{\ensuremath{\pi}}{=0}^{+}$ ground states for these odd-odd $N=Z$ nuclei. These data represent the heaviest $N=Z$ systems for which Fermi superallowed decays have been established. |
| Databáze: | OpenAIRE |
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