In-beam γ -ray spectroscopy of the neutron-rich platinum isotope Pt200 toward the N=126 shell gap
| Autor: | S. M. Lenzi, M. Bunce, A. Vogt, B. Birkenbach, A. M. Bizzeti-Sona, A. Gottardo, W. Korten, Michele Sferrazza, P. Reiter, A. Kusoglu, M. D. Salsac, J. Walshe, C. A. Ur, P. R. John, Fernando Scarlassara, F. Recchia, P. G. Bizzeti, D. Bazzacco, A. M. Stefanini, L. Corradi, A. Bracco, L. Grente, C. Wheldon, Roberto Menegazzo, G. Montagnoli, G. Pollarolo, D. Mengoni, Tz. Kokalova, T. Mijatović, V. Modamio, Tomás R. Rodríguez, Zs. Podolyák, A. Gadea, Herbert Hess, F. Browne, M. Barr, G. Benzoni, F. C. L. Crespi, Suzana Szilner, E. Fioretto, B. Melon, S. Leoni, M. Bowry, E. Farnea, C. Michelagnoli, S. Bottoni, S. Lunardi, D. Montanari, G. de Angelis, Oliver J. Roberts, Pär-Anders Söderström, E. Sahin, J. Ljungvall, J. J. Valiente-Dobón, N. I. Ashwood, D. R. Napoli, F. Camera, T. Alexander |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Gamma ray Order (ring theory) 7. Clean energy 01 natural sciences medicine.anatomical_structure Excited state 0103 physical sciences medicine Neutron AGATA Gamma spectroscopy Atomic physics Nuclear Experiment 010306 general physics Spectroscopy Nucleus |
| Zdroj: | Physical Review C. 95 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | The neutron-rich nucleus \nucleus{200}{Pt} is investigated via in-beam \gamma-ray spectroscopy in order to study the shape evolution in the neutron-rich platinum isotopes towards the N = 126 shell closure. The two-neutron transfer reaction \nucleus{198}{Pt}(\nucleus{82}{Se}, \nucleus{80}{Se})\nucleus{200}{Pt} is used to populate excited states of \nucleus{200}{Pt}. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects \gamma rays coincident with the \nucleus{80}{Se} recoils, the binary partner of \nucleus{200}{Pt}. The binary partner method is applied to extract the \gamma-ray transitions and build the level scheme of \nucleus{200}{Pt}. The level at 1884\,keV reported by Yates et. al [Phys. Rev. C 37, 1889] was confirmed to be at 1882.1\,keV and assigned as the (6^+_1) state. An additional \gamma ray was found and it presumably de-excites the (8^+_1) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even \nucleus{190-204}{Pt} isotopes, revealing that \nucleus{200}{Pt} marks the transition from the \gamma-unstable behaviour of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure. |
| Databáze: | OpenAIRE |
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