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Neutron single-particle strength in silicon isotopes: Constraining the driving forces of shell evolution

Stroberg, SR, Gade, A, Tostevin, JA, Bader, VM, Baugher, T, Bazin, D, Berryman, JR, Brown, BA, Campbell, CM, Kemper KW, , Langer C, , Lunderberg E, , Lemasson, A, Noji, S, Otsuka, T, Reccia, F, Walz, C, Weisshaar, D and Williams, S (2015) Neutron single-particle strength in silicon isotopes: Constraining the driving forces of shell evolution Physical Review C: Nuclear Physics, 91 (4), 041302.

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Abstract

Shell evolution is studied in the neutron-rich silicon isotopes Si36,38,40 using neutron single-particle strengths deduced from one-neutron knockout reactions. Configurations involving neutron excitations across the N=20 and N=28 shell gaps are quantified experimentally in these rare isotopes. Comparisons with shell model calculations show that the tensor force, understood to drive the collective behavior in Si42 with N=28, is already important in determining the structure of Si40 with N=26. New data relating to cross-shell excitations provide the first quantitative support for repulsive contributions to the cross-shell T=1 interaction arising from three-nucleon forces.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Stroberg, SR
Gade, A
Tostevin, JA
Bader, VM
Baugher, T
Bazin, D
Berryman, JR
Brown, BA
Campbell, CM
Kemper KW,
Langer C,
Lunderberg E,
Lemasson, A
Noji, S
Otsuka, T
Reccia, F
Walz, C
Weisshaar, D
Williams, S
Date : 15 April 2015
Identification Number : 10.1103/PhysRevC.91.041302
Related URLs :
Additional Information : Copyright 2015 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 22 May 2015 08:12
Last Modified : 31 Oct 2017 17:25
URI: http://epubs.surrey.ac.uk/id/eprint/807486

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