Experimental study of mirror nuclei 10Be - 10C, 11B - 11C, and 9Be - 9B populated via 10B + 10B nuclear reactions

Jelavić Malenica, Deša; Milin, Matko; Di Pietro, Alessia; Figuera, Pierpaolo; Musumarra, Agatino; Pellegriti, Maria Grazia; Scuderi, Valentina; Soić, Neven; Szilner, Suzana; Torresi, Domenico; Uroić, Milivoj (2025) Experimental study of mirror nuclei 10Be - 10C, 11B - 11C, and 9Be - 9B populated via 10B + 10B nuclear reactions. Physical Review C, 112 (4). ISSN 2469-9985

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Abstract

The symmetric 10B + 10B reaction provides a unique opportunity to populate high-energy, high-spin states in the mirror pairs 10Be-10C,11B-11C,and 9Be-9B. Excitation spectra for these systems have been measured and mirror analog states identified, enabling a systematic comparison of their level energies. We find that states in compact shell-model configurations (e.g., members of ground-state rotational bands) show very small mirror energy differences (consistent with standard Coulomb displacement energies), whereas spatially extended clusterlike states exhibit significantly reduced energy gaps consistent with the Thomas-Ehrman shift. In the 10Be-10C pair, a previously unreported level at Ex = 9.24 MeV in 10C is observed, which we propose as the isospin analog of the 9.56 MeV 2+ state in 10Be. In the 11B-11C pair, we report a high-lying state at Ex = 10.69 MeV in 11C, mirroring the 11.21-MeV level in 11B which was populated via one-nucleon transfer for the first time. Finally, the observed 9Be-9B mirrors show nearly identical excitation spectra; in particular, strongly populated states follow a J(J + 1) energy trend, highest of which are consistent with their assignment as the 9/2-members of the ground-state rotational band. These findings highlight the interplay of Coulomb and structural effects in mirror nuclei and extend the known level schemes of the nuclei in question.

Item Type:	Article
Uncontrolled Keywords:	nuclear physics; mirror nuclei; cluster states
Subjects:	NATURAL SCIENCES > Physics > Nuclear Physics
Divisions:	Division of Experimental Physics
Depositing User:	Deša Jelavić Malenica
Date Deposited:	30 Jan 2026 11:18
URI:	http://fulir.irb.hr/id/eprint/11199
DOI:	10.1103/p14g-w98k

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