Ground-state phase transition in odd-A and odd-odd nuclei near N=90

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Ground-state phase transitions in odd nuclei are examined. Especially, the phase transitions in odd-odd nuclei are revealed. It is found that odd-even effects may reach their maximal or minimal values around the critical point at N=90; the signals of phase transition in odd nuclei are greatly enhanced relative to those in the adjacent even-even species. Moreover, a pairing model analysis of the phase transition in Sm isotopes indicates that the critical behaviors related to pairing may be driven by the decrease in the pair strength G with a sudden flattening in ΔG around the critical point. © 2013 American Physical Society.

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Physical Review C - Nuclear Physics

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