Phys.Rev. C 100, 061303 (2019)

M.Spieker, D.Weisshaar, A.Gade, B.A.Brown, P.Adrich, D.Bazin, M.A.Bentley, J.R.Brown, C.M.Campbell, C.Aa.Diget, B.Elman, T.Glasmacher, M.Hill, B.Longfellow, B.Pritychenko, A.Ratkiewicz, D.Rhodes, J.A.Tostevin

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

NUCLEAR REACTIONS ⁹Be(⁵⁵Co, ⁵⁴Co), (⁵⁵Co, ⁵⁴Fe), E not given, [secondary ⁵⁵Co beam from ⁹Be(⁵⁸Ni, X), E=160 MeV/nucleon, followed by separation of ⁵⁵Co using A1900 fragment separator at NSCL-MSU]; measured projectile-like reaction residues, Eγ, Iγ, (particle)γ-coin using the S800 spectrograph for particles and SeGA array for γ rays. ⁵⁴Co, ⁵⁴Fe; deduced levels, J, π, cross sections for population of levels. Comparison with large-scale-shell-model (LSSM) calculations; investigated possible isospin-symmetry breaking in the A=54, T=1 triplet through the isobaric mass multiplet equation (IMME).

doi: 10.1103/PhysRevC.100.061303