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Shape evolution in the neutron-rich osmium isotopes: Prompt gamma-ray spectroscopy of Os-196

John, PR, Modamio, V, Valiente-Dobon, JJ, Mengoni, D, Lunardi, S, Rodriguez, TR, Bazzacco, D, Gadea, A, Wheldon, C, 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, Cederwall, B, Corradi, L, Crespi, FCL, Desesquelles, P, Eberth, J, Farnea, E, Fioretto, E, Goergen, A, Gottardo, A, Grebosz, J, Grente, L, Hess, H, Jungclaus, A, Kokalova, T, Korichi, A, Korten, W, Kusoglu, A, Lenzi, S, Leoni, S, Ljungvall, J, Maron, G, Meczynski, W, Melon, B, Menegazzo, R, Michelagnoli, C, Mijatovic, T, Million, B, Molini, P, Montagnoli, G, Montanari, D, Napoli, DR, Nolan, P, Oziol, C, Podolyak, Z, Pollarolo, G, Pullia, A, Quintana, B, Recchia, F, Reiter, P, Roberts, OJ, Rosso, D, Sahin, E, Salsac, M-D, Scarlassara, F, Sferrazza, M, Simpson, J, Soderstrom, P-A, Stefanini, AM, Stezowski, O, Szilner, S, Theisen, C, Ur, CA and Walshe, J (2014) Shape evolution in the neutron-rich osmium isotopes: Prompt gamma-ray spectroscopy of Os-196 Physical Review C - Nuclear Physics, 90 (2), ARTN 0.

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Abstract

The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
John, PR
Modamio, V
Valiente-Dobon, JJ
Mengoni, D
Lunardi, S
Rodriguez, TR
Bazzacco, D
Gadea, A
Wheldon, C
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
Cederwall, B
Corradi, L
Crespi, FCL
Desesquelles, P
Eberth, J
Farnea, E
Fioretto, E
Goergen, A
Gottardo, A
Grebosz, J
Grente, L
Hess, H
Jungclaus, A
Kokalova, T
Korichi, A
Korten, W
Kusoglu, A
Lenzi, S
Leoni, S
Ljungvall, J
Maron, G
Meczynski, W
Melon, B
Menegazzo, R
Michelagnoli, C
Mijatovic, T
Million, B
Molini, P
Montagnoli, G
Montanari, D
Napoli, DR
Nolan, P
Oziol, C
Podolyak, Z
Pollarolo, G
Pullia, A
Quintana, B
Recchia, F
Reiter, P
Roberts, OJ
Rosso, D
Sahin, E
Salsac, M-D
Scarlassara, F
Sferrazza, M
Simpson, J
Soderstrom, P-A
Stefanini, AM
Stezowski, O
Szilner, S
Theisen, C
Ur, CA
Walshe, J
Date : 13 August 2014
Identification Number : 10.1103/PhysRevC.90.021301
Uncontrolled Keywords : Science & Technology, Physical Sciences, Physics, Nuclear, Physics, ATOMIC-NUCLEI, TRANSITION, COEXISTENCE, ISOMERS, OS
Related URLs :
Additional Information : Copyright 2014 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 15 Sep 2015 08:27
Last Modified : 31 Oct 2017 17:37
URI: http://epubs.surrey.ac.uk/id/eprint/808397

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