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Lui","submitted_at":"2018-04-22T08:46:01Z","abstract_excerpt":"Nuclear level densities and $\\gamma$-ray strength functions have been extracted for $^{59, 60}\\rm{Ni}$, using the Oslo method on data sets from the $^{60}$Ni($^{3}$He,$^{3}$He$^{\\prime}\\gamma$)$^{60}$Ni and $^{60}$Ni($^{3}$He,$\\alpha\\gamma$)$^{59}$Ni reactions. Above the neutron separation energy, S$_n$, we have measured the $\\gamma$-ray strength functions for $^{61}$Ni and $^{60}$Ni in photoneutron experiments. The low-energy part of the $^{59,60}$Ni $\\gamma$-ray strength functions show an increase for decreasing $\\gamma$ energies. 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