Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei
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...
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-03-01
|
| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320300265 |
| _version_ | 1811203628027871232 |
|---|---|
| author | N. Cieplicka-Oryńczak C. Michelagnoli A. Gargano B. Fornal S. Leoni G. Benzoni A. Blanc S. Bottoni F.C.L. Crespi Ł.W. Iskra M. Jentschel U. Köster P. Mutti N. Pietralla E. Ruiz-Martinez V. Werner |
| author_facet | N. Cieplicka-Oryńczak C. Michelagnoli A. Gargano B. Fornal S. Leoni G. Benzoni A. Blanc S. Bottoni F.C.L. Crespi Ł.W. Iskra M. Jentschel U. Köster P. Mutti N. Pietralla E. Ruiz-Martinez V. Werner |
| author_sort | N. Cieplicka-Oryńczak |
| collection | DOAJ |
| description | 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. Keywords: Nuclear structure 206Tl, 210Bi, γγ-coin. 206Tl, Branching ratios 206Tl, Deduced levels and Jπ 206Tl, Comparison with shell-model calculations |
| first_indexed | 2024-04-12T02:58:28Z |
| format | Article |
| id | doaj.art-5e238ed09ac343b8916130dd4200fb8e |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-12T02:58:28Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-5e238ed09ac343b8916130dd4200fb8e2022-12-22T03:50:45ZengElsevierPhysics Letters B0370-26932020-03-01802Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nucleiN. Cieplicka-Oryńczak0C. Michelagnoli1A. Gargano2B. Fornal3S. Leoni4G. Benzoni5A. Blanc6S. Bottoni7F.C.L. Crespi8Ł.W. Iskra9M. Jentschel10U. Köster11P. Mutti12N. Pietralla13E. Ruiz-Martinez14V. Werner15Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, PL-31342 Kraków, Poland; Corresponding author.Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceINFN Sezione di Napoli, Via Cintia, 80126 Napoli, ItalyInstitute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, PL-31342 Kraków, PolandINFN Sezione di Milano, Via Celoria 16, 20133 Milano, Italy; Università degli Studi di Milano, Via Celoria 16, 20133 Milano, ItalyINFN Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyInstitut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceINFN Sezione di Milano, Via Celoria 16, 20133 Milano, Italy; Università degli Studi di Milano, Via Celoria 16, 20133 Milano, ItalyINFN Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyINFN Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyInstitut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceInstitut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceInstitut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceTechnische Universität Darmstadt, Karolinenplatz 5, 64289 Darmstadt, GermanyInstitut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, FranceTechnische Universität Darmstadt, Karolinenplatz 5, 64289 Darmstadt, GermanyA 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. Keywords: Nuclear structure 206Tl, 210Bi, γγ-coin. 206Tl, Branching ratios 206Tl, Deduced levels and Jπ 206Tl, Comparison with shell-model calculationshttp://www.sciencedirect.com/science/article/pii/S0370269320300265 |
| spellingShingle | N. Cieplicka-Oryńczak C. Michelagnoli A. Gargano B. Fornal S. Leoni G. Benzoni A. Blanc S. Bottoni F.C.L. Crespi Ł.W. Iskra M. Jentschel U. Köster P. Mutti N. Pietralla E. Ruiz-Martinez V. Werner Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei Physics Letters B |
| title | Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei |
| title_full | Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei |
| title_fullStr | Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei |
| title_full_unstemmed | Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei |
| title_short | Contrasting properties of particle-particle and hole-hole excitations in 206Tl and 210Bi nuclei |
| title_sort | contrasting properties of particle particle and hole hole excitations in 206tl and 210bi nuclei |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320300265 |
| work_keys_str_mv | AT ncieplickaorynczak contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT cmichelagnoli contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT agargano contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT bfornal contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT sleoni contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT gbenzoni contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT ablanc contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT sbottoni contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT fclcrespi contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT łwiskra contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT mjentschel contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT ukoster contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT pmutti contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT npietralla contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT eruizmartinez contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei AT vwerner contrastingpropertiesofparticleparticleandholeholeexcitationsin206tland210binuclei |