%0 Journal Article %1 BOCCHI2016273 %A Bocchi, G. %A Leoni, S. %A Fornal, B. %A Colò, G. %A Bortignon, P.F. %A Bottoni, S. %A Bracco, A. %A Michelagnoli, C. %A Bazzacco, D. %A Blanc, A. %A de France, G. %A Jentschel, M. %A Köster, U. %A Mutti, P. %A Régis, J.-M. %A Simpson, G. %A Soldner, T. %A Ur, C.A. %A Urban, W. %A Fraile, L.M. %A Lozeva, R. %A Belvito, B. %A Benzoni, G. %A Bruce, A. %A Carroll, R. %A Cieplicka-Oryǹczak, N. %A Crespi, F.C.L. %A Didierjean, F. %A Jolie, J. %A Korten, W. %A Kröll, T. %A Lalkovski, S. %A Mach, H. %A Mărginean, N. %A Melon, B. %A Mengoni, D. %A Million, B. %A Nannini, A. %A Napoli, D. %A Olaizola, B. %A Paziy, V. %A Podolyák, Zs. %A Regan, P.H. %A Saed-Samii, N. %A Szpak, B. %A Vedia, V. %D 2016 %J Physics Letters B %K myown %P 273 - 278 %R https://doi.org/10.1016/j.physletb.2016.06.065 %T The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb %U http://www.sciencedirect.com/science/article/pii/S0370269316303252 %V 760 %X Abstract The γ-ray decay of excited states of the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission of 235U and 241Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr3(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus 132Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.

@article{BOCCHI2016273, abstract = {Abstract The γ-ray decay of excited states of the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission of 235U and 241Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr3(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus 132Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.}, added-at = {2018-01-20T22:38:21.000+0100}, author = {Bocchi, G. and Leoni, S. and Fornal, B. and Colò, G. and Bortignon, P.F. and Bottoni, S. and Bracco, A. and Michelagnoli, C. and Bazzacco, D. and Blanc, A. and de France, G. and Jentschel, M. and Köster, U. and Mutti, P. and Régis, J.-M. and Simpson, G. and Soldner, T. and Ur, C.A. and Urban, W. and Fraile, L.M. and Lozeva, R. and Belvito, B. and Benzoni, G. and Bruce, A. and Carroll, R. and Cieplicka-Oryǹczak, N. and Crespi, F.C.L. and Didierjean, F. and Jolie, J. and Korten, W. and Kröll, T. and Lalkovski, S. and Mach, H. and Mărginean, N. and Melon, B. and Mengoni, D. and Million, B. and Nannini, A. and Napoli, D. and Olaizola, B. and Paziy, V. and Podolyák, Zs. and Regan, P.H. and Saed-Samii, N. and Szpak, B. and Vedia, V.}, biburl = {https://www.bibsonomy.org/bibtex/217fb8a1f54904e5b4fd5449480b421f1/ikpcologne}, description = {The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb - ScienceDirect}, doi = {https://doi.org/10.1016/j.physletb.2016.06.065}, interhash = {eadef1838f613eeae0a0d4ecc9c85f22}, intrahash = {17fb8a1f54904e5b4fd5449480b421f1}, issn = {0370-2693}, journal = {Physics Letters B}, keywords = {myown}, pages = {273 - 278}, timestamp = {2018-01-20T22:38:21.000+0100}, title = {The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb}, url = {http://www.sciencedirect.com/science/article/pii/S0370269316303252}, volume = 760, year = 2016 }