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In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N = 126 shell gap

John, PR, Valiente-Dob on, JJ, Mengoni, D, Modamio, V, Lunardi, S, Bazzacco, D, Gadea, A, Wheldon, C, Rodr guez, TR, Alexander, T , de Angelis, G, Ashwood, N, Barr, M, Benzoni, G, Birkenbach, B, Bizzeti, PG, Bizzeti-Sona, AM, Bottoni, S, Bowry, M, Bracco, A, Browne, F, Bunce, M, Camera, F, Corradi, L, Crespi, FCL, Melon, B, Farnea, E, Fioretto, E, Gottardo, A, Grente, L, Hess, H, Kokalova, T, Mijatovi c, T, Montagnoli, G, Montanari, D, Napoli, DR, Podolyak, Zsolt, Pollarolo, G, Recchia, F, Reiter, P, Roberts, OJ, Sahin, E, Salsac, M-D, Scarlassara, F, Sferrazza, M, Soderstrom, P-A, Stefanini, AM, Szilner, S, Ur, CA, Vogt, A and Walshe, A (2017) In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N = 126 shell gap Physical Review C: Nuclear Physics, 95, 064321. 064321-1.

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Abstract

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.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
John, PR
Valiente-Dob on, JJ
Mengoni, D
Modamio, V
Lunardi, S
Bazzacco, D
Gadea, A
Wheldon, C
Rodr guez, TR
Alexander, T
de Angelis, G
Ashwood, N
Barr, M
Benzoni, G
Birkenbach, B
Bizzeti, PG
Bizzeti-Sona, AM
Bottoni, S
Bowry, M
Bracco, A
Browne, F
Bunce, M
Camera, F
Corradi, L
Crespi, FCL
Melon, B
Farnea, E
Fioretto, E
Gottardo, A
Grente, L
Hess, H
Kokalova, T
Mijatovi c, T
Montagnoli, G
Montanari, D
Napoli, DR
Podolyak, ZsoltZ.Podolyak@surrey.ac.uk
Pollarolo, G
Recchia, F
Reiter, P
Roberts, OJ
Sahin, E
Salsac, M-D
Scarlassara, F
Sferrazza, M
Soderstrom, P-A
Stefanini, AM
Szilner, S
Ur, CA
Vogt, A
Walshe, A
Date : 22 June 2017
Funders : Science and Technology Facilities Council (STFC)
Identification Number : 10.1103/PhysRevC.95.064321
Copyright Disclaimer : ©2017 American Physical Society.
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 11 May 2017 15:15
Last Modified : 27 Jul 2017 12:30
URI: http://epubs.surrey.ac.uk/id/eprint/814153

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