Spectroscopy of 54Ti and the systematic behavior of low-energy octupole states in Ca and Ti isotopes

L.A. Riley, M.L. Agiorgousis, T.R. Baugher, D. Bazin, R.L. Blanchard, M. Bowry, P.D. Cottle, F.G. DeVone, A. Gade, M.T. Glowacki, K.W. Kemper, J.S. Kustina, E. Lunderberg, D.M. McPherson, S. Noji, J. Piekarewicz, F. Recchia, B.V. Sadler, M. Scott, D. WeisshaarR.G.T. Zegers

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Excited states of the N=32 nucleus 54Ti have been studied, via both inverse-kinematics proton scattering and one-neutron knockout from 55Ti by a liquid hydrogen target, using the GRETINA γ-ray tracking array. Inelastic proton-scattering cross sections and deformation lengths have been determined. A low-lying octupole state has been tentatively identified in 54Ti for the first time. A comparison of (p,p′) results on low-energy octupole states in the neutron-rich Ca and Ti isotopes with the results of random phase approximation calculations demonstrates that the observed systematic behavior of these states is unexpected.
Original languageEnglish
Article number064315
JournalPhysical Review C
Issue number6
Publication statusPublished - 19 Dec 2017
Externally publishedYes


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