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The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb

Bocchi, Giovanni ; Leoni, Silvia ; Fornal, Bogdan ; Colò, Gianluca ; Bortignon, Pier Francesco ; Bottoni, Simone ; Bracco, Angela ; Michelagnoli, Caterina ; Bazzacco, Dino B. ; Blanc, Aurélien ; France, Gilles de ; Jentschel, Michael ; Köster, Ulli ; Mutti, Paolo ; Régis, Jean Marc ; Simpson, Gary S. ; Soldner, Torsten ; Ur, Calin Alexandru ; Urban, Waldemar ; Fraile, Luis Mario ; Lozeva, Radomira ; Belvito, B. ; Benzoni, Giovanna ; Bruce, Alison M. ; Carroll, R. ; Cieplicka-Orynczak, Natalia ; Crespi, Fabio Celso Luigi ; Didierjean, François ; Jolie, Jan ; Korten, Wolfram ; Kröll, Thorsten ; Nannini, Adriana ; Napoli, Daniel R. ; Olaizola, Bruno ; Paziy, V. ; Podolyák, Zs. ; Regan, Patrick ; Saed-Samii, N. ; Szpak, Bartłomiej ; Lalkovski, Stefan ; Mach, Henryk A. ; Mârginean, Nicolae Marius ; Melon, Barbara ; Mengoni, Daniele ; Million, Bénédicte ; Vedia, Victoria (2022):
The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb. (Publisher's Version)
In: Physics Letters B, 760, pp. 273-278. Elsevier, ISSN 0370-2693, e-ISSN 1873-2445,
DOI: 10.26083/tuprints-00012670,
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Item Type: Article
Origin: Secondary publication
Status: Publisher's Version
Title: The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb
Language: English
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.

Journal or Publication Title: Physics Letters B
Volume of the journal: 760
Publisher: Elsevier
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 09 Mar 2022 15:16
Last Modified: 10 Mar 2022 09:55
DOI: 10.26083/tuprints-00012670
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-126705
Additional Information:

Keywords: Neutron induced fission; Gamma spectroscopy; Nuclear state lifetime; Large Ge array; Particle-core couplings

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12670
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