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Experimental identification of the T = 1, Jπ = 6+ state of 54Co and isospin symmetry in A = 54 studied via one-nucleon knockout reactions

Spieker, M., Weisshaar, D., Gade, A., Brown, B. A., Adrich, P., Bazin, D., Bentley, M.A., Brown, J.R., Campbell, C.M., Diget, C.Aa. , Elman, B., Glasmacher, T., Hill, M., Longfellow, B., Pritychenko, B., Ratkiewicz, A., Rhodes, D. and Tostevin, J.A. (2019) Experimental identification of the T = 1, Jπ = 6+ state of 54Co and isospin symmetry in A = 54 studied via one-nucleon knockout reactions Physical Review C, 100 (6), 061303(R).

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Abstract

New experimental data obtained from γ-ray tagged one-neutron and one-proton knockout from 55Co is presented. A candidate for the sought-after T = 1, T z = 0, Jπ = 6+ state in 54Co is proposed based on a comparison to the new data on 54Fe, the corresponding observables predicted by large-scale-shell-model (LSSM) calculations in the full fp-model space employing charge-dependent contributions, and isospin-symmetry arguments. Furthermore, possible isospin-symmetry breaking in the A = 54, T = 1 triplet is studied by calculating the experimental c coefficients of the isobaric mass multiplet equation (IMME) up to the maximum possible spin J = 6 expected for the (1f7/2)-2 two-hole configuration relative to the doubly-magic nucleus 56Ni. The experimental quantities are compared to the theoretically predicted c coefficients from LSSM calculations using two-body matrix elements obtained from a realistic chiral effective field theory potential at next-to-next-to-next-to leading order (N3LO).

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Spieker, M.
Weisshaar, D.
Gade, A.
Brown, B. A.
Adrich, P.
Bazin, D.
Bentley, M.A.
Brown, J.R.
Campbell, C.M.
Diget, C.Aa.
Elman, B.
Glasmacher, T.
Hill, M.
Longfellow, B.
Pritychenko, B.
Ratkiewicz, A.
Rhodes, D.
Tostevin, J.A.J.Tostevin@surrey.ac.uk
Date : 11 December 2019
Funders : Science and Technology Facilities Council (STFC)
DOI : 10.1103/PhysRevC.100.061303
Copyright Disclaimer : © 2019 American Physical Society
Related URLs :
Additional Information : This work was supported by the National Science Foundation under Grant No. PHY-1565546 (NSCL) and PHY-1811855, the DOE National Nuclear Security Ad- ministration through the Nuclear Science and Security Consortium under Award No. DE-NA0003180 as well as by the UK Science and Technology Facilities Coun- cil (STFC) through Research Grant No. ST/F005314/1, ST/P003885/1 and GR/T18486/01.
Depositing User : Diane Maxfield
Date Deposited : 21 Nov 2019 15:18
Last Modified : 21 Jan 2020 14:14
URI: http://epubs.surrey.ac.uk/id/eprint/853195

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