In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap (CROSBI ID 240402)
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John, P.R. ; Valiente-Dobon, J.J. ; Mengoni, D. ; Modamio, V. ; Lunardi, S. ; Bazzacco, D. ; Gadea, A. ; Wheldon, C. ; Rodriguez, T.R. ; Alexander, T. ; de Angelis, G. ; Ashwood, N. ; Barr, M. ; Benzoni, G. ; Birkenbach, B. ; Bizzeti, P.G. ; Bizzeti-Sona, A.M. ; Bottoni, S. ; Bowry, M. ; Bracco, A. ; Browne, F. ; Bunce, M. ; Camera, F. ; Corradi, L. ; Crespi, F.C.L. ; Melon, B. ; Farnea, E. ; Fioretto, E. ; Gottardo, A. ; Grente, L. ; Hess, H. ; Kokalova, Tz. ; Korten, W. ; Kussoglu, A. ; Lenzi, S. ; Leoni, S. ; Ljungvall, J. ; Menegazzo, R. ; Michelagnoli, C. ; Mijatović, Tea ; Montagnoli, G. ; Montanari, D. ; Napoli, D.R. ; Podolyak, Zs. ; Pollarolo, G. ; Recchia, F. ; Reiter, P. ; Roberts, O.J. ; Sahin, E. ; Salsac, M.-D. ; Scarlassara, F. ; Sferrazza, M. ; Soderstrom, P.-A. ; Stefanini, A.M. ; Szilner, Suzana ; Ur, C.A. ; Vogt, A. ; Walshe, J.
engleski
In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap
The neutron-rich nucleus 200Pt is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction 198Pt(82Se, 80Se)200Pt is used to populate excited states of 200Pt. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the 80Se recoils, the binary partner of 200Pt. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of 200Pt. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (6+1) state. An additional γ ray was found and it presumably deexcites the (8+1) state. The results are compared with state-of-the- art beyond mean-field calculations, performed for the even-even 190−204Pt isotopes, revealing that 200Pt marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.
nuclear structure ; electromagnetic transitions ; nuclear reactions
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