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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 , 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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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 :
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
Saito, T
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 :
Depositing User : Symplectic Elements
Date Deposited : 27 Apr 2017 13:33
Last Modified : 16 Jan 2019 17:14

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