E0 transition strengths as a tool to constraint model parameters. Application to even-even Xe isotopes
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910046252695552 |
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| author | Martin-Higueras, P. Garcia-Ramos, J. E. |
| author_facet | Martin-Higueras, P. Garcia-Ramos, J. E. |
| contents | Background: In any nuclear structure model, the accurate description of E0 transition rates constitutes a significant challenge; at the same time, these observables provide a stringent constraint on the admissible parameter space of the model.
Purpose: This work pretend to study the value of certain $ρ^2(E0)$ values or ratios over the whole parameter space of the interacting boson model. As an application, the case of the even-even Xe isotopes will be explored.
Method: The interacting boson model will be considered for the calculation of $ρ^2(E0)$ values for some key transitions and to explore how these observables change over the parameter space of the model.
Results: Several key $ρ^2(E0)$ values or ratios are considered and contour plots in the parameter space of the interacting boson model (Casten triangle) are computed. The results for even-even Xe isotopes are superimposed on the contour plots.
Conclusions: The presented analysis confirms that $ρ^2(E0)$ values and, in particular, certain ratios allow to constraint the parameter space of the interacting boson model. There are certain regions where the $ρ^2(E0)$ values cannot be altered by the fine tuning of the Hamiltonian parameters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_08197 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | E0 transition strengths as a tool to constraint model parameters. Application to even-even Xe isotopes Martin-Higueras, P. Garcia-Ramos, J. E. Nuclear Theory Background: In any nuclear structure model, the accurate description of E0 transition rates constitutes a significant challenge; at the same time, these observables provide a stringent constraint on the admissible parameter space of the model. Purpose: This work pretend to study the value of certain $ρ^2(E0)$ values or ratios over the whole parameter space of the interacting boson model. As an application, the case of the even-even Xe isotopes will be explored. Method: The interacting boson model will be considered for the calculation of $ρ^2(E0)$ values for some key transitions and to explore how these observables change over the parameter space of the model. Results: Several key $ρ^2(E0)$ values or ratios are considered and contour plots in the parameter space of the interacting boson model (Casten triangle) are computed. The results for even-even Xe isotopes are superimposed on the contour plots. Conclusions: The presented analysis confirms that $ρ^2(E0)$ values and, in particular, certain ratios allow to constraint the parameter space of the interacting boson model. There are certain regions where the $ρ^2(E0)$ values cannot be altered by the fine tuning of the Hamiltonian parameters. |
| title | E0 transition strengths as a tool to constraint model parameters. Application to even-even Xe isotopes |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2603.08197 |