Competing shape evolution, crossing configurations and single particle levels in nuclei
Fuente:
arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909341838213120 |
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| author | Gavrielov, Noam |
| author_facet | Gavrielov, Noam |
| contents | The evolution of shape in the even-even zirconium (Zr) isotopes has been the subject of study for many years. However, the odd-mass isotopes have not been investigated as extensively due to limited experimental accessibility and computational challenges. This work, employing the interacting boson-fermion model with configuration mixing, examines the effect of rapid shape evolution and normal-intruder configuration crossing -- both identified as quantum phase transitions -- alongside evolution in single particle energies, on the positive-parity spectrum of odd-mass $^\text{93-103}$Zr isotopes. Calculated energy levels, magnetic moments, $B(E2)$ values, and quadrupole moments are compared to experimental data, showing good agreement. The special case of $^{99}$Zr, which lies near the critical point of both quantum phase transitions, is also addressed, offering a new interpretation to the $7/2^+_1$ isomeric state and the occurrence of the type II shell evolution, in light of recent debates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_00967 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Competing shape evolution, crossing configurations and single particle levels in nuclei Gavrielov, Noam Nuclear Theory The evolution of shape in the even-even zirconium (Zr) isotopes has been the subject of study for many years. However, the odd-mass isotopes have not been investigated as extensively due to limited experimental accessibility and computational challenges. This work, employing the interacting boson-fermion model with configuration mixing, examines the effect of rapid shape evolution and normal-intruder configuration crossing -- both identified as quantum phase transitions -- alongside evolution in single particle energies, on the positive-parity spectrum of odd-mass $^\text{93-103}$Zr isotopes. Calculated energy levels, magnetic moments, $B(E2)$ values, and quadrupole moments are compared to experimental data, showing good agreement. The special case of $^{99}$Zr, which lies near the critical point of both quantum phase transitions, is also addressed, offering a new interpretation to the $7/2^+_1$ isomeric state and the occurrence of the type II shell evolution, in light of recent debates. |
| title | Competing shape evolution, crossing configurations and single particle levels in nuclei |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2409.00967 |