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Shell and shape evolution at N=28: The Mg40 ground state

Crawford, HL, Fallon, P, Macchiavelli, AO, Clark, RM, Brown, BA, Tostevin, JA, Bazin, D, Aoi, N, Doornenbal, P, Matsushita, M, Scheit, H, Steppenbeck, D, Takeuchi, S, Baba, H, Campbell, CM, Cromaz, M, Ideguchi, E, Kobayashi, N, Kondo, Y, Lee, G, Lee, IY, Lee, J, Li, K, Michimasa, S, Motobayashi, T, Nakamura, T, Ota, S, Paschalis, S, Petri, M, Sako, T, Sakurai, H, Shimoura, S, Takechi, M, Togano, Y, Wang, H and Yoneda, K (2014) Shell and shape evolution at N=28: The Mg40 ground state Physical Review C: Nuclear Physics, 89, 041303.

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Abstract

A measurement of the direct two-proton removal from Si42 has provided the first structural information on the N=28 isotone Mg40. The value for the inclusive cross section for two-proton removal from Si42 of 40+27−17 μb is significantly lower than that predicted by structure calculations using the recent SDPF-MU shell-model effective interaction combined with eikonal reaction theory. This observed discrepancy is consistent with the interpretation that only one of the predicted low-lying 0+ states in Mg40 is bound. A two-state mixing analysis describing two-proton knockout cross sections along N=28 provides support for the interpretation of a prolate-deformed Mg40 ground state.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Crawford, HLUNSPECIFIEDUNSPECIFIED
Fallon, PUNSPECIFIEDUNSPECIFIED
Macchiavelli, AOUNSPECIFIEDUNSPECIFIED
Clark, RMUNSPECIFIEDUNSPECIFIED
Brown, BAUNSPECIFIEDUNSPECIFIED
Tostevin, JAUNSPECIFIEDUNSPECIFIED
Bazin, DUNSPECIFIEDUNSPECIFIED
Aoi, NUNSPECIFIEDUNSPECIFIED
Doornenbal, PUNSPECIFIEDUNSPECIFIED
Matsushita, MUNSPECIFIEDUNSPECIFIED
Scheit, HUNSPECIFIEDUNSPECIFIED
Steppenbeck, DUNSPECIFIEDUNSPECIFIED
Takeuchi, SUNSPECIFIEDUNSPECIFIED
Baba, HUNSPECIFIEDUNSPECIFIED
Campbell, CMUNSPECIFIEDUNSPECIFIED
Cromaz, MUNSPECIFIEDUNSPECIFIED
Ideguchi, EUNSPECIFIEDUNSPECIFIED
Kobayashi, NUNSPECIFIEDUNSPECIFIED
Kondo, YUNSPECIFIEDUNSPECIFIED
Lee, GUNSPECIFIEDUNSPECIFIED
Lee, IYUNSPECIFIEDUNSPECIFIED
Lee, JUNSPECIFIEDUNSPECIFIED
Li, KUNSPECIFIEDUNSPECIFIED
Michimasa, SUNSPECIFIEDUNSPECIFIED
Motobayashi, TUNSPECIFIEDUNSPECIFIED
Nakamura, TUNSPECIFIEDUNSPECIFIED
Ota, SUNSPECIFIEDUNSPECIFIED
Paschalis, SUNSPECIFIEDUNSPECIFIED
Petri, MUNSPECIFIEDUNSPECIFIED
Sako, TUNSPECIFIEDUNSPECIFIED
Sakurai, HUNSPECIFIEDUNSPECIFIED
Shimoura, SUNSPECIFIEDUNSPECIFIED
Takechi, MUNSPECIFIEDUNSPECIFIED
Togano, YUNSPECIFIEDUNSPECIFIED
Wang, HUNSPECIFIEDUNSPECIFIED
Yoneda, KUNSPECIFIEDUNSPECIFIED
Date : 30 April 2014
Identification Number : 10.1103/PhysRevC.89.041303
Related URLs :
Additional Information : Copyright 2014 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 16 May 2014 12:36
Last Modified : 16 Sep 2014 14:01
URI: http://epubs.surrey.ac.uk/id/eprint/805476

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