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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 :
NameEmailORCID
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
Yoneda, K
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 : 31 Oct 2017 16:44
URI: http://epubs.surrey.ac.uk/id/eprint/805476

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