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Search for 2d5/2 Neutron States in $^{69}$Ni

Abstract : It has been shown that the neutron 2d5=2 orbital has to be included in shell-model calculations to explain the large quadrupole collectivity observed in the Fe and Cr of N = 40 region, probably a new island of inversion similar to the one known for light nuclei around N = 20. Indeed, in these calculations using a large valence neutron space, the position, i.e. the singleparticle energy, of the 2d5=2 orbital is a crucial ingredient. The experiment discussed in this paper aims to determine the $\nu$1g9=2–$\nu$2d5=2 gap using the neutron stripping reaction d(68Ni; p)68Ni which has been performed at GANIL in inverse kinematics. Preliminary results are presented.
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http://hal.in2p3.fr/in2p3-00578739
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Submitted on : Tuesday, March 22, 2011 - 9:13:49 AM
Last modification on : Friday, December 4, 2020 - 9:42:02 AM

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M. Moukaddam, G. Duchêne, D. Beaumel, G. Burgunder, L. Caceres, et al.. Search for 2d5/2 Neutron States in $^{69}$Ni. XLV Zakopane Conference on Nuclear physics "Extremes of the Nuclear Landscape", Aug 2010, Zakopane, Poland. pp.541-544, ⟨10.5506/APhysPolB.42.541⟩. ⟨in2p3-00578739⟩

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