First Indication for Shape Transitions in Neutron-rich Selenium Isotopes

Chen, S, Doornenbal, P, Obertelli, A, Rodrıguez, TR, Authelet, G, Baba, H, Calvet, D, Chateau, F, Corsi, A, Delbart, A et al, Gheller, J-M, Giganon, A, Gillibert, A, Lapoux, V, Motobayashi, T, Niikura, M, Paul, N, Rousse, J-Y, Sakurai, H, Santamaria, C, Steppenbeck, D, Taniuchi, R, Uesaka, T, Ando, T, Arici, T, Blazhev, A, Browne, F, Bruce, AM, Caroll, R, Chung, LX, Cortes, ML, Dewald, M, Ding, B, Flavigny, F, Franchoo, S, Gorska, M, Gottardo, A, Jungclaus, A, Lee, J, Lettmann, M, Linh, BD, Liu, J, Liu, Z, Lizarazo, C, Momiyama, S, Moschner, K, Nagamine, S, Nakatsuka, N, Nita, CR, Nobs, C, Olivier, L, Orlandi, R, Patel, Z, Podolyak, Zsolt, Rudigier, Matthias, Saito, T, Shand, Callum, Soderstrom, PA, Stefan, I, Vaquero, V, Werner, V, Wimmer, K and Xu, Z (2017) First Indication for Shape Transitions in Neutron-rich Selenium Isotopes Physical Review C: Nuclear Physics.

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Abstract

Neutron-rich 88,90,92,94Se isotopes were studied via in-beam γ-ray spectroscopy after production from nucleon removal at intermediate energies at the Radioactive Isotope Beam Factory. γ-γ coincidence analysis allowed to establish level schemes for the first time in these nuclei, including the 2+ 1 → 0 + gs, 4+ 1 → 2 + 1 transitions and their energy ratio R4/2. Low-lying 2+ 2 levels and their branching to the 2+ 1 and 0+ gs states were observed. The experimental results are in good agreement with self-consistent beyond-mean-field calculations based on the Gogny D1S interaction, suggesting ground state shape transition from oblate to prolate then back to oblate between N = 52 − 60 and indicating shape coexistence.

Item Type:	Article
Subjects :	Physics
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Name Email ORCID Chen, S Doornenbal, P Obertelli, A Rodrıguez, TR Authelet, G Baba, H Calvet, D Chateau, F Corsi, A Delbart, A Gheller, J-M Giganon, A Gillibert, A Lapoux, V Motobayashi, T Niikura, M Paul, N Rousse, J-Y Sakurai, H Santamaria, C Steppenbeck, D Taniuchi, R Uesaka, T Ando, T Arici, T Blazhev, A Browne, F Bruce, AM Caroll, R Chung, LX Cortes, ML Dewald, M Ding, B Flavigny, F Franchoo, S Gorska, M Gottardo, A Jungclaus, A Lee, J Lettmann, M Linh, BD Liu, J Liu, Z Lizarazo, C Momiyama, S Moschner, K Nagamine, S Nakatsuka, N Nita, CR Nobs, C Olivier, L Orlandi, R Patel, Z Podolyak, Zsolt Z.Podolyak@surrey.ac.uk Rudigier, Matthias m.rudigier@surrey.ac.uk Saito, T Shand, Callum c.shand@surrey.ac.uk Soderstrom, PA Stefan, I Vaquero, V Werner, V Wimmer, K Xu, Z
Date :	27 July 2017
Copyright Disclaimer :	Copyright 2017 American Physical Society
Related URLs :	Publisher
Depositing User :	Symplectic Elements
Date Deposited :	27 Apr 2017 13:33
Last Modified :	20 Jul 2017 13:48
URI:	http://epubs.surrey.ac.uk/id/eprint/814055

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