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Octupole strength in the neutron-rich calcium isotopes

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arxiv 1604.08624 v1 pith:X6G33DNJ submitted 2016-04-28 nucl-ex

classification nucl-ex
keywords isotopesstatescalciumgammaneutron-richoctupoleprotonarray
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abstract

Low-lying excited states of the neutron-rich calcium isotopes $^{48-52}$Ca have been studied via $\gamma$-ray spectroscopy following inverse-kinematics proton scattering on a liquid hydrogen target using the GRETINA $\gamma$-ray tracking array. The energies and strengths of the octupole states in these isotopes are remarkably constant, indicating that these states are dominated by proton excitations.

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