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arXiv · 1712.00411

Spectroscopy of $^{54}$Ti 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. Weisshaar·R. G. T. Zegers
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Abstract

Excited states of the $N=32$ nucleus $^{54}$Ti have been studied, via both inverse-kinematics proton scattering and one-neutron knockout from $^{55}$Ti 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 $^{54}$Ti 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.

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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. Weisshaar, R. G. T. Zegers. 2017-12-01. Spectroscopy of $^{54}$Ti and the systematic behavior of low energy octupole states in Ca and Ti isotopes. https://doi.org/10.1103/physrevc.96.064315

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