Isospin symmetry and proton decay: Identification of the10+isomer inNi54
Physical Review C2008Vol. 78(2)
Citations Over TimeTop 10% of 2008 papers
D. Rudolph, R. Hoischen, M. Hellström, S. Piétri, Zs. Podolyák, P. H. Regan, A. B. Garnsworthy, S. J. Steer, F. Becker, P. Bednarczyk, L. Cáceres, P. Doornenbal, J. Gerl, M. Górska, J. Grȩbosz, I. Kojouharov, N. Kurz, W. Prokopowicz, H. Schaffner, H. J. Wollersheim, L.-L. Andersson, L. Atanasova, D. L. Balabanski, M. A. Bentley, A. Blazhev, C. Brandau, J. R. Brown, C. Fahlander, Emma Johansson, A. Jungclaus, S. M. Lenzi
Abstract
The \ensuremath{\gamma} decays from an isomeric ${10}^{+}$ state at 6457 keV in the nucleus ${}_{28}^{54}$${\mathrm{Ni}}_{26}$ have been identified using the GSI fragment separator in conjunction with the RISING Ge-detector array. The state is interpreted as the isobaric analog of the 6527-keV ${10}^{+}$ isomer in ${}_{26}^{54}$${\mathrm{Fe}}_{28}$. The results are discussed in terms of isospin-dependent shell-model calculations. Clear evidence is presented for a discrete $\ensuremath{\ell}=5$ proton decay branch into the first excited $9/{2}^{\ensuremath{-}}$ state of the daughter $^{53}\mathrm{Co}$. This decay is the first of its kind observed following projectile fragmentation reactions.
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