New insights into triaxiality and shape coexistence from odd-mass $^{109}$Rh
| Autor: | Bucher, B., Mach, H., Aprahamian, A., Robledo, L.M., Simpson, G.S., Rissanen, J., Ghiţă, D.G., Olaizola, B., Kurcewicz, W., Äystö, J., Eronen, T., Fraile, L.M., Jokinen, A., Karvonen, P., Moore, I.D., Penttilä, H., Reponen, M., Ruchowska, E., Saastamoinen, A., Smith, M.K., Weber, C. |
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| Přispěvatelé: | Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys.Rev.C Phys.Rev.C, 2018, 98 (6), pp.064320. ⟨10.1103/PhysRevC.98.064320⟩ Physical Review C Physical Review C, American Physical Society, 2018, 98 (6), pp.064320. ⟨10.1103/PhysRevC.98.064320⟩ |
| ISSN: | 2469-9985 2469-9993 |
| Popis: | International audience; Rapid shape evolutions near A=100 are now the focus of much attention in nuclear science. Much of the recent work has been centered on isotopes with Z≤40, where the shapes are observed to transition between near-spherical to highly deformed with only a single pair of neutrons added. At higher Z, the shape transitions become more gradual as triaxiality sets in, yet the coexistence of varying shapes continues to play an important role in the low-energy nuclear structure, particularly in the odd-Z isotopes. This work aims to characterize competing shapes in the triaxial region between Zr and Sn isotopes using ultrafast timing techniques to measure lifetimes of excited states in the neutron-rich nucleus Rh109. The measurements confirm the persistence at higher Z of similarly large deformations observed near Z=40. Moreover, we show that new self-consistent mean-field calculations, with proper treatment of the odd nucleon, are able to reproduce the coexisting triaxial and highly deformed configurations revealing, for the first time, the important contribution of the unpaired nucleon to these different shapes based on the blocking of specific single-particle orbitals. |
| Databáze: | OpenAIRE |
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