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Two-neutron knockout from neutron-deficient 34Ar, 30S, and 26Si

K. Yoneda, A. Obertelli, A. Gade, D. Bazin, B. A. Brown, C. M. Campbell, J. M. Cook, P. D. Cottle, A. D. Davies, D. -C. Dinca, T. Glasmacher, P. G. Hansen, T. Hoagland, K. W. Kemper, J. -L. Lecouey, W. F. Mueller, R. R. Reynolds, J. R. Terry, J. A. Tostevin, H. Zwahlen

nucl-exarXiv:nucl-ex/0607017

Abstract

Two-neutron knockout reactions from nuclei in the proximity of the proton dripline have been studied using intermediate-energy beams of neutron-deficient 34Ar, 30S, and 26Si. The inclusive cross sections, and also the partial cross sections for the population of individual bound final states of the 32Ar, 28S and 24Si knockout residues, have been determined using the combination of particle and γ-ray spectroscopy. Similar to the two-proton knockout mechanism on the neutron-rich side of the nuclear chart, these two-neutron removal reactions from already neutron-deficient nuclei are also shown to be consistent with a direct reaction mechanism.

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