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Contrasting properties of particle-particle and hole-hole excitations in ²⁰⁶Tl and ²¹⁰Bi nuclei

Cieplicka-Oryńczak, Natalia ; Michelagnoli, Caterina ; Gargano, Angela ; Fornal, Bogdan ; Leoni, Silvia ; Benzoni, Giovanna ; Blanc, Aurélien ; Bottoni, Simone ; Crespi, Fabio Celso Luigi ; Iskra, Łukasz ; Jentschel, Michael ; Köster, Ulli ; Mutti, Paolo ; Pietralla, Norbert ; Ruiz-Martinez, Emilio ; Werner, Volker (2022):
Contrasting properties of particle-particle and hole-hole excitations in ²⁰⁶Tl and ²¹⁰Bi nuclei. (Publisher's Version)
In: Physics Letters B, 802, Elsevier, ISSN 0370-2693, e-ISSN 1873-2445,
DOI: 10.26083/tuprints-00012679,

Available under: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Origin: Secondary publication
Status: Publisher's Version
Title: Contrasting properties of particle-particle and hole-hole excitations in ²⁰⁶Tl and ²¹⁰Bi nuclei
Language: English

A complete-spectroscopy investigation of low-lying, low-spin states in the one-proton-hole and one-neutron-hole nucleus 206Tl has been performed by using thermal neutron capture and γ-coincidence technique with the FIPPS Ge array at ILL Grenoble. The new experimental results, together with data for the one-proton-particle and one-neutron-particle nucleus 210Bi (taken from a previous study done at ILL in the EXILL campaign), allowed for an extensive comparison with predictions of shell-model calculations performed with realistic interactions. No phenomenological adjustments were introduced in the calculations. In 210Bi, state energies, transition multipolarities and decay branchings agree well with theory for the three well separated multiplets of states which dominate the low-lying excitations. On the contrary, in 206Tl significant discrepancies are observed: in the same energy region, six multiplets were identified, with a significant mixing among them being predicted, as a consequence of the smaller energy separation between the active orbitals. The discrepancies in 206Tl are attributed to the larger uncertainties in the determination of the off-diagonal matrix elements of the realistic shell-model interaction with respect to the calculated diagonal matrix elements, the only ones playing a major role in the case of 210Bi. The work points to the need of more advanced approaches in the construction of the realistic interactions.

Journal or Publication Title: Physics Letters B
Volume of the journal: 802
Publisher: Elsevier
Collation: 5 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
05 Department of Physics > Institute of Nuclear Physics > Experimentelle Kernphysik > Experimental Nuclear Structure Physics with Exotic Ion Beams
Date Deposited: 09 Mar 2022 13:32
Last Modified: 10 Mar 2022 09:55
DOI: 10.26083/tuprints-00012679
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-126796
Additional Information:

Keywords: Nuclear structure 206Tl; 210Biγγ-coin. 206Tl; Branching ratios 206Tl; Deduced levels and Jπ206Tl; Comparison with shell-model calculations

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12679
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