Shell evolution of N = 40 isotones towards 60Ca: First spectroscopy of 62Ti
Excited states in the isotone 62Ti were populated via the 63V62Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using γ-ray spectroscopy. The energies of the and transitions, observed here for the first time, indicate a deformed 62Ti ground state. These energies ar...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/215202 |
| Acceso en línea: | https://hdl.handle.net/2445/215202 |
| Access Level: | acceso abierto |
| Palabra clave: | Isòtops Espectrometria de raigs gamma Isotopes Gamma ray spectrometry |
| Sumario: | Excited states in the isotone 62Ti were populated via the 63V62Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using γ-ray spectroscopy. The energies of the and transitions, observed here for the first time, indicate a deformed 62Ti ground state. These energies are increased compared to the neighboring 64Cr and 66Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for 62Ti show a dominant configuration with four neutrons excited across the gap. Likewise, they indicate that the island of inversion extends down to , disfavoring a possible doubly magic character of the elusive 60Ca. |
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