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First observation of low-lying excited states in the very neutron-rich $^{95}Kr$

Abstract : Microsecond isomers of neutron-rich nuclei in the mass A=95 chain were investigated at the ILL reactor, Grenoble. These nuclei were produced by thermal-neutron induced fission of $^{241}Pu$. The detection is based on time correlation between fission fragments selected by the Lohengrin mass spectrometer and the $\gamma$-rays from the isomers. In this paper the decay scheme of an isomer of half life 1.4(2) micro second in $^{95}Kr$ is reported. It is the first time that excited states of this nucleus have been measured. These data show that this neutron rich N = 59 isotone is spherical at low excitation energy.
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Submitted on : Friday, January 13, 2006 - 10:43:19 AM
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J. Genevey, R. Guglielmini, R. Orlandi, J.A. Pinston, A. Scherillo, et al.. First observation of low-lying excited states in the very neutron-rich $^{95}Kr$. Physical Review C, American Physical Society, 2006, 73, pp.037308. ⟨10.1103/PhysRevC.73.037308⟩. ⟨in2p3-00025381⟩

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